VOLTAGE-TO-FREQUENCY CONVERTER

Save this PDF as:

Size: px
Start display at page:

Download "VOLTAGE-TO-FREQUENCY CONVERTER"

Transcription

1 VOTAGE-TO-FEQUENY ONVETE Internal circuit of M I VOTAGE EFEENE M OP AMP UENT MIO Q,9V Q P B Vin T ONE SHOT TIME VOT OMP VOT OMP S Q Q Q Q Q Q In direct transmission of an analog signal (below), V AN will be more easily corrupted by noise. TEM PEATUE SENSO INTEFAE SIGNA V AN SIGNA NOISE FITE V AN By converting V AN to a large signal whose frequency is proportional to V AN, the transmission of the signal becomes much less corruptible by external noise. TEM PEATUE SENSO F to V O NVETE V AN INTEFAE V AN V to F O NVETE SIGNA SIGNA NOISE FITE- EV E DETETO. Sauriol ev. // Page -

2 Timing Diagram m = I s -(V ave / ) m - = V ave V ave V = V V IPPE VOTAGE m = I s I initial transient charging from to V VAIABE SW FIXED PW T out -, T, T V cc / V cc V T = V V out V cc SET ESET The D current, or average current, through capacitor is A once the V waveform has settled. TIME (ave ) PW T = I ( ave) I (ave) =, V if V in V V in A ave = T out PW = V ref n() T =,9 T V = PW m = PW I V S in = SW m = ( T PW). Sauriol ev. // Page -

3 NOTE: To obtain good linearity at low values of, the ripple voltage V must be very small which means that the time constant must be very large and this makes the converter very slow to react to changes of. When ripple is very small, the frequency of the V to F depends on a very small signal easily corruptible with noise or spurious signals which may result in an erratic O/P frequency. For small values of, the equation derived for is not accurate because ripple must be factored in and becomes a non-linear function of. Basic V-F onverter in BY, µf, µf V Vin HYS BA in out thr Ire M gnd Isw P T mv to V K Vin µf K K K Fmax adj ust in out thr Ire M Isw gnd K,K Fout Hz to khz, µf From =,9 T we find that s = will produce a khz full scale output given the standard values on the diagram. The k pot will have to be adjusted to some other value because of component tolerance. PW =, T =,**,µ =, µs fixed I s =,9V/Ω = µa For F = Hz to khz, duty ycle =,µ/(, to µ) * =,% to,% NOTE: PW and duty cycle refer to the switched current source I sw (pin#). The duty cycle of the output waveform is inverted, that is D/ out = 99,9% to,%. V o V and V - o V ipple Voltage ( ) k µ V = PW m = PW I =,µ µ m = 9,9m,mV pp NOTE: Those small ripple values make the V to F vulnerable to noise and unreliable operation may result. At Hz the discharge of is not linear (it is exponential) because =,s = T SW. The speed of the V-F converter is determine by the time constant. For the above circuit, the rise time of V thr is : t r =,/(F c ) =,* π* =,s which is rather slow. For a faster response of V thr (and ) should be made smaller but this will entail more ripple voltage across and therefore less accuracy at low and values. Hysteresis The amount of hysteresis of the input comparator, for clean and faster switching (no crossover oscillations), is V HYS = I s HYS = µ * =, mv - this will impair low operation.. Sauriol ev. // Page -

4 hoice of in in The input low-pass filter produces a cutoff frequency of F c = (π*k*,µ) - =,9 Hz. It is used to filter down any HF noise that contaminates the D input voltage. If the input D voltage is changed abruptly to a new value, the M input ( at pin ) will settle to its new value in about in in =*K*,µ = ms. Therefore the response time of the output frequency will the compounded value of t r of t r of V thr. hoice of T Maximum duty cycle (PW/T)* =, T * F max < 9% and should leave enough time for the internal circuit to reset when SW = T-PW becomes very small. PW should not be too small either. hoice of Select for desired maximum ripple V = PW = ( T PW ) and for desired rise time of V thr : t r =,*π* Waveforms showing effect of hysteresis provided by HYS on V waveform. When is detected by the comparator, V pulls up abruptly to prevent oscillations (chattering) at the internal comparator output. V V HYS V HYST IMPOVED V to F ONVETE -ve INTEGATO I E Aave F Vo V to F ONVETE V I sw A P s I s in out thr Ire M Isw gnd T p s. Sauriol ev. // Page -

5 The above converter has a very linear V to F characteristic because its output frequency is totally independant of the ripple voltage present at (pin ) of the M. For fast and reliable operation of the V to F converter, F can be made very small in order to get subtantial ripple - V pp recommended onverter equations = PW T = I E I F ave = I E = PW T = ( ) V ref P S n() T = ( P S ) = T = P S = V ref n() T. 9. T ( ) = I E ( T PW)= I I sw E F F PW The basic waveforms are shown below. m = I E / F m - = -(I sw -I E )/ F V thr V thr -, I sw A PW = T n() V V out V The output frequency can be made to respond very rapidly to an abrupt change in by selecting a small value for F which entails a large ripple voltage for of M.. Sauriol ev. // Page -

6 BASI F TO V ONVETE V Hz to khz Vmax adj ust Vin pf K K k k k k k in thr out M gnd k Ire Isw, µf,k k, µf, µf I SUPPY BY- PASS AP, µf D OUTPUT Vout mv to V V V V TH,V (I) 9V,V,V SET PW SET V V T V ESET A V EF PW T V V OUT (D) V. Sauriol ev. // Page -

7 The D output voltage is : V out (ave) = (ave ) = PW () T in = V ref, T F in =,9 T F in The output ripple voltage is given by - see appendix for derivation: V out (pp ) = PW The output filter has the following TF: F PW for F > (π ) - F(S) = ( ) S S = S S = S, ( ) S, The above TF allows us to determine the rise and fall times of V out in response to an input frequency jump. The approximate value can be determined from the first cutoff frequency: t r = t f. F =.. π =. The internal latch SET pulsewidth (PW set ) must be less than the current pulsewidth PW T =, T, otherwise the circuit will not work properly. PW set is determined by the input coupling capacitor and the input resistance K K. PW SET = in in n V V F.. = K p n V V F 9. =. µs PW T =, T =,.K.µ =. µs NOTE: PW set =. µs may not be long enough to set the internal S latch - minimum time not specified. NOTE: If the input square wave has a large amplitude, the protection diodes will turn on and the exponential pulses at the junction of the two K resistors will have two time constants, that is: ( K K K) p when one of the diodes is ON (K K ) x p when the diodes are OFF.. Sauriol ev. // Page -

8 APPENDIX Derivation Of Output ipple Voltage NOTON THEVENIN V V V V V TH V TH PW T V OUT (D ) V V V OUT (D ) V t PW ( () T ) V (PP) = V H ( A) dt = PW ( I t S V ave )= PW I S V (PP) = PW PW T ( ()) = PW ( ) PW T V (PP) = t V (A ) dt = ( V ( PP) T )= V (PP) T t V (PP) = T PW I S ( ) PW T = I PW ( ) T PW NOTE: =. Sauriol ev. // Page -

A Lesson on Digital Clocks, One Shots and Counters

A Lesson on Digital Clocks, One Shots and Counters A Lesson on Digital Clocks, One Shots and Counters Topics Clocks & Oscillators LM 555 Timer IC Crystal Oscillators Selection of Variable Resistors Schmitt Gates Power-On Reset Circuits One Shots Counters

More information

css Custom Silicon Solutions, Inc.

css Custom Silicon Solutions, Inc. css Custom Silicon Solutions, Inc. CSS555(C) CSS555/ PART DESCRIPTION The CSS555 is a micro-power version of the popular 555 Timer IC. It is pin-for-pin compatible with the standard 555 timer and features

More information

A Lesson on Digital Clocks, One Shots and Counters

A Lesson on Digital Clocks, One Shots and Counters A Lesson on Digital Clocks, One Shots and Counters Topics Clocks & Oscillators LM 555 Timer IC Crystal Oscillators Selection of Variable Resistors Schmitt Gates Power-On Reset Circuits One Shots Counters

More information

LM 358 Op Amp. If you have small signals and need a more useful reading we could amplify it using the op amp, this is commonly used in sensors.

LM 358 Op Amp. If you have small signals and need a more useful reading we could amplify it using the op amp, this is commonly used in sensors. LM 358 Op Amp S k i l l L e v e l : I n t e r m e d i a t e OVERVIEW The LM 358 is a duel single supply operational amplifier. As it is a single supply it eliminates the need for a duel power supply, thus

More information

Basic Op Amp Circuits

Basic Op Amp Circuits Basic Op Amp ircuits Manuel Toledo INEL 5205 Instrumentation August 3, 2008 Introduction The operational amplifier (op amp or OA for short) is perhaps the most important building block for the design of

More information

Constant Current Control for DC-DC Converters

Constant Current Control for DC-DC Converters Constant Current Control for DC-DC Converters Introduction... Theory of Operation... Power Limitations... Voltage Loop Stability...2 Current Loop Compensation...3 Current Control Example...5 Battery Charger

More information

NTE2053 Integrated Circuit 8 Bit MPU Compatible A/D Converter

NTE2053 Integrated Circuit 8 Bit MPU Compatible A/D Converter NTE2053 Integrated Circuit 8 Bit MPU Compatible A/D Converter Description: The NTE2053 is a CMOS 8 bit successive approximation Analog to Digital converter in a 20 Lead DIP type package which uses a differential

More information

Step Response of RC Circuits

Step Response of RC Circuits Step Response of RC Circuits 1. OBJECTIVES...2 2. REFERENCE...2 3. CIRCUITS...2 4. COMPONENTS AND SPECIFICATIONS...3 QUANTITY...3 DESCRIPTION...3 COMMENTS...3 5. DISCUSSION...3 5.1 SOURCE RESISTANCE...3

More information

NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator

NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator NTE923 & NTE923D Integrated Circuit Precision Voltage Regulator Description: The NTE923 and NTE923D are voltage regulators designed primarily for series regulator applications. By themselves, these devices

More information

AS2815. 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

AS2815. 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response 1.5A Low Dropout oltage Regulator Adjustable & Fixed Output, Fast Response FEATURES Adjustable Output Down To 1.2 Fixed Output oltages 1.5, 2.5, 3.3, 5.0 Output Current of 1.5A Low Dropout oltage 1.1 Typ.

More information

ICL8038. Features. Precision Waveform Generator/Voltage Controlled Oscillator. Ordering Information. Pinout. Functional Diagram

ICL8038. Features. Precision Waveform Generator/Voltage Controlled Oscillator. Ordering Information. Pinout. Functional Diagram Semiconductor IL0 September 99 File Number 4. Precision Waveform Generator/Voltage ontrolled Oscillator The IL0 waveform generator is a monolithic integrated circuit capable of producing high accuracy

More information

Physics 623 Transistor Characteristics and Single Transistor Amplifier Sept. 13, 2006

Physics 623 Transistor Characteristics and Single Transistor Amplifier Sept. 13, 2006 Physics 623 Transistor Characteristics and Single Transistor Amplifier Sept. 13, 2006 1 Purpose To measure and understand the common emitter transistor characteristic curves. To use the base current gain

More information

AP331A XX G - 7. Lead Free G : Green. Packaging (Note 2)

AP331A XX G - 7. Lead Free G : Green. Packaging (Note 2) Features General Description Wide supply Voltage range: 2.0V to 36V Single or dual supplies: ±1.0V to ±18V Very low supply current drain (0.4mA) independent of supply voltage Low input biasing current:

More information

Rectifier circuits & DC power supplies

Rectifier circuits & DC power supplies Rectifier circuits & DC power supplies Goal: Generate the DC voltages needed for most electronics starting with the AC power that comes through the power line? 120 V RMS f = 60 Hz T = 1667 ms) = )sin How

More information

FAN5346 Series Boost LED Driver with PWM Dimming Interface

FAN5346 Series Boost LED Driver with PWM Dimming Interface FAN5346 Series Boost LED Driver with PWM Dimming Interface Features Asynchronous Boost Converter Drives LEDs in Series: FAN5346S20X: 20V Output FAN5346S30X: 30V Output 2.5V to 5.5V Input Voltage Range

More information

Experiment # (4) AM Demodulator

Experiment # (4) AM Demodulator Islamic University of Gaza Faculty of Engineering Electrical Department Experiment # (4) AM Demodulator Communications Engineering I (Lab.) Prepared by: Eng. Omar A. Qarmout Eng. Mohammed K. Abu Foul Experiment

More information

HT9170 DTMF Receiver. Features. General Description. Selection Table

HT9170 DTMF Receiver. Features. General Description. Selection Table DTMF Receiver Features Operating voltage: 2.5V~5.5V Minimal external components No external filter is required Low standby current (on power down mode) General Description The HT9170 series are Dual Tone

More information

Precision Diode Rectifiers

Precision Diode Rectifiers by Kenneth A. Kuhn March 21, 2013 Precision half-wave rectifiers An operational amplifier can be used to linearize a non-linear function such as the transfer function of a semiconductor diode. The classic

More information

AMPLIFIED HIGH SPEED FIBER PHOTODETECTOR USER S GUIDE

AMPLIFIED HIGH SPEED FIBER PHOTODETECTOR USER S GUIDE AMPLIFIED HIGH SPEED FIBER PHOTODETECTOR USER S GUIDE Thank you for purchasing your Amplified High Speed Fiber Photodetector. This user s guide will help answer any questions you may have regarding the

More information

Operational Amplifier as mono stable multi vibrator

Operational Amplifier as mono stable multi vibrator Page 1 of 5 Operational Amplifier as mono stable multi vibrator Aim :- To construct a monostable multivibrator using operational amplifier 741 and to determine the duration of the output pulse generated

More information

Vi, fi input. Vphi output VCO. Vosc, fosc. voltage-controlled oscillator

Vi, fi input. Vphi output VCO. Vosc, fosc. voltage-controlled oscillator Experiment #4 CMOS 446 Phase-Locked Loop c 1997 Dragan Maksimovic Department of Electrical and Computer Engineering University of Colorado, Boulder The purpose of this lab assignment is to introduce operating

More information

Section 3. Sensor to ADC Design Example

Section 3. Sensor to ADC Design Example Section 3 Sensor to ADC Design Example 3-1 This section describes the design of a sensor to ADC system. The sensor measures temperature, and the measurement is interfaced into an ADC selected by the systems

More information

Op Amp Circuit Collection

Op Amp Circuit Collection Op Amp Circuit Collection Note: National Semiconductor recommends replacing 2N2920 and 2N3728 matched pairs with LM394 in all application circuits. Section 1 Basic Circuits Inverting Amplifier Difference

More information

Digital to Analog and Analog to Digital Conversion

Digital to Analog and Analog to Digital Conversion Real world (lab) is Computer (binary) is digital Digital to Analog and Analog to Digital Conversion V t V t D/A or DAC and A/D or ADC D/A Conversion Computer DAC A/D Conversion Computer DAC Digital to

More information

MM74HC4538 Dual Retriggerable Monostable Multivibrator

MM74HC4538 Dual Retriggerable Monostable Multivibrator MM74HC4538 Dual Retriggerable Monostable Multivibrator General Description The MM74HC4538 high speed monostable multivibrator (one shots) is implemented in advanced silicon-gate CMOS technology. They feature

More information

Testing a power supply for line and load transients

Testing a power supply for line and load transients Testing a power supply for line and load transients Power-supply specifications for line and load transients describe the response of a power supply to abrupt changes in line voltage and load current.

More information

1.5A Very L.D.O Voltage Regulator LM29150/29151/29152

1.5A Very L.D.O Voltage Regulator LM29150/29151/29152 FEATURES High Current Capability 1.5A Low Dropout Voltage 350mV Low Ground Current Accurate 1% Guaranteed Initial Tolerance Extremely Fast Transient Response Reverse-Battery and "Load Dump" Protection

More information

Frequency Response of Filters

Frequency Response of Filters School of Engineering Department of Electrical and Computer Engineering 332:224 Principles of Electrical Engineering II Laboratory Experiment 2 Frequency Response of Filters 1 Introduction Objectives To

More information

TEA1024/ TEA1124. Zero Voltage Switch with Fixed Ramp. Description. Features. Block Diagram

TEA1024/ TEA1124. Zero Voltage Switch with Fixed Ramp. Description. Features. Block Diagram Zero Voltage Switch with Fixed Ramp TEA04/ TEA4 Description The monolithic integrated bipolar circuit, TEA04/ TEA4 is a zero voltage switch for triac control in domestic equipments. It offers not only

More information

Tone Ringer SL2410 LOGIC DIAGRAM PIN ASSIGNMENT SLS

Tone Ringer SL2410 LOGIC DIAGRAM PIN ASSIGNMENT SLS Tone Ringer The SL2410 is a bipolar integrated circuit designed for telephone bell replacement. Designed for Telephone Bell Replacement Low Curent Drain Adjustable 2-frequency Tone Adjustable Warbling

More information

The full wave rectifier consists of two diodes and a resister as shown in Figure

The full wave rectifier consists of two diodes and a resister as shown in Figure The Full-Wave Rectifier The full wave rectifier consists of two diodes and a resister as shown in Figure The transformer has a centre-tapped secondary winding. This secondary winding has a lead attached

More information

FEATURES DESCRIPTION APPLICATIONS BLOCK DIAGRAM. PT2248 Infrared Remote Control Transmitter

FEATURES DESCRIPTION APPLICATIONS BLOCK DIAGRAM. PT2248 Infrared Remote Control Transmitter Infrared Remote Control Transmitter DESCRIPTION PT2248 is an infrared remote control transmitter utilizing CMOS Technology. It is capable of 18 functions and a total of 75 commands. Single-shot and continuous

More information

Fundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder

Fundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder Robert W. Erickson University of Colorado, Boulder 1 1.1. Introduction to power processing 1.2. Some applications of power electronics 1.3. Elements of power electronics Summary of the course 2 1.1 Introduction

More information

CE8301 Series. Introduction. Features. Ordering Information. Applications SMALL PACKAGE PFM CONTROL STEP-UP DC/DC CONVERTER

CE8301 Series. Introduction. Features. Ordering Information. Applications SMALL PACKAGE PFM CONTROL STEP-UP DC/DC CONVERTER SMALL PACKAGE PFM CONTROL STEP-UP DC/DC CONVERTER Introduction The is a CMOS PFM-control step-up switching DC/DC converter that mainly consists of a reference voltage source, an oscillator, and a comparator.

More information

Low Cost Instrumentation Amplifier AD622

Low Cost Instrumentation Amplifier AD622 Data Sheet FEATURES Easy to use Low cost solution Higher performance than two or three op amp design Unity gain with no external resistor Optional gains with one external resistor (Gain range: 2 to 000)

More information

AC/DC Power Supply Reference Design. Advanced SMPS Applications using the dspic DSC SMPS Family

AC/DC Power Supply Reference Design. Advanced SMPS Applications using the dspic DSC SMPS Family AC/DC Power Supply Reference Design Advanced SMPS Applications using the dspic DSC SMPS Family dspic30f SMPS Family Excellent for Digital Power Conversion Internal hi-res PWM Internal high speed ADC Internal

More information

High-Speed, 5 V, 0.1 F CMOS RS-232 Driver/Receivers ADM202/ADM203

High-Speed, 5 V, 0.1 F CMOS RS-232 Driver/Receivers ADM202/ADM203 a FEATURES kb Transmission Rate ADM: Small (. F) Charge Pump Capacitors ADM3: No External Capacitors Required Single V Power Supply Meets EIA-3-E and V. Specifications Two Drivers and Two Receivers On-Board

More information

See Horenstein 4.3 and 4.4

See Horenstein 4.3 and 4.4 EE 462: Laboratory # 4 DC Power Supply Circuits Using Diodes by Drs. A.V. Radun and K.D. Donohue (2/14/07) Department of Electrical and Computer Engineering University of Kentucky Lexington, KY 40506 Updated

More information

AN-8019 Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter

AN-8019 Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter www.fairchildsemi.com AN-8019 Reliable USB Modem Design Using the Combination of an Integrated Load Switch and a Buck Converter Introduction In the portable electronics market, a wireless network allows

More information

CD74HC4046A, CD74HCT4046A

CD74HC4046A, CD74HCT4046A February 99 SEMICONDUCTOR CD7HC6A, CD7HCT6A High-Speed CMOS Logic Phase-Locked-Loop with VCO Features Operating Frequency Range - Up to MHz (Typ) at = 5V - Minimum Center Frequency of MHz at Choice of

More information

1. Learn about the 555 timer integrated circuit and applications 2. Apply the 555 timer to build an infrared (IR) transmitter and receiver

1. Learn about the 555 timer integrated circuit and applications 2. Apply the 555 timer to build an infrared (IR) transmitter and receiver Electronics Exercise 2: The 555 Timer and its Applications Mechatronics Instructional Laboratory Woodruff School of Mechanical Engineering Georgia Institute of Technology Lab Director: I. Charles Ume,

More information

US-SPI New generation of High performances Ultrasonic device

US-SPI New generation of High performances Ultrasonic device US-SPI New generation of High performances Ultrasonic device Lecoeur Electronique - 19, Rue de Courtenay - 45220 CHUELLES - Tel. : +33 ( 0)2 38 94 28 30 - Fax : +33 (0)2 38 94 29 67 US-SPI Ultrasound device

More information

LM337. Three-terminal adjustable negative voltage regulators. Features. Description

LM337. Three-terminal adjustable negative voltage regulators. Features. Description Three-terminal adjustable negative voltage regulators Datasheet - production data current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional

More information

Switch Mode Power Supply Topologies

Switch Mode Power Supply Topologies Switch Mode Power Supply Topologies The Buck Converter 2008 Microchip Technology Incorporated. All Rights Reserved. WebSeminar Title Slide 1 Welcome to this Web seminar on Switch Mode Power Supply Topologies.

More information

CAN Bus Transceivers Operate from 3.3V or 5V and Withstand ±60V Faults

CAN Bus Transceivers Operate from 3.3V or 5V and Withstand ±60V Faults CAN Bus Transceivers Operate from 3.3V or 5V and Withstand ±6 Faults Ciaran Brennan design features The LTC2875 is a robust CAN bus transceiver that features ±6 overvoltage and ±25kV ESD tolerance to reduce

More information

LDS8720. 184 WLED Matrix Driver with Boost Converter FEATURES APPLICATION DESCRIPTION TYPICAL APPLICATION CIRCUIT

LDS8720. 184 WLED Matrix Driver with Boost Converter FEATURES APPLICATION DESCRIPTION TYPICAL APPLICATION CIRCUIT 184 WLED Matrix Driver with Boost Converter FEATURES High efficiency boost converter with the input voltage range from 2.7 to 5.5 V No external Schottky Required (Internal synchronous rectifier) 250 mv

More information

Current Loop Tuning Procedure. Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) General Procedure AN-015

Current Loop Tuning Procedure. Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) General Procedure AN-015 Servo Drive Current Loop Tuning Procedure (intended for Analog input PWM output servo drives) The standard tuning values used in ADVANCED Motion Controls drives are conservative and work well in over 90%

More information

US-Key New generation of High performances Ultrasonic device

US-Key New generation of High performances Ultrasonic device US-Key New generation of High performances Ultrasonic device US-Key connected to a laptop computer US-Key Ultrasound device single channel Features USB2 High Speed connection Ultralow noise preamplifier

More information

AP1510. General Description. Features. Applications. Typical Application Circuit PWM CONTROL 3A STEP-DOWN CONVERTER AP1510. x (1+R A = V FB /R B

AP1510. General Description. Features. Applications. Typical Application Circuit PWM CONTROL 3A STEP-DOWN CONVERTER AP1510. x (1+R A = V FB /R B Features General Description Input voltage: 3.6 to 23 Output voltage: 0.8 to CC. Duty ratio: 0% to 100% PWM control Oscillation frequency: 300kHz typ. Current Limit, Enable function Thermal Shutdown function

More information

Design A High Performance Buck or Boost Converter With Si9165

Design A High Performance Buck or Boost Converter With Si9165 Design A High Performance Buck or Boost Converter With Si9165 AN723 AN723 by Kin Shum INTRODUCTION The Si9165 is a controller IC designed for dc-to-dc conversion applications with 2.7- to 6- input voltage.

More information

Advanced Monolithic Systems

Advanced Monolithic Systems Advanced Monolithic Systems FEATURES Three Terminal Adjustable or Fixed oltages* 1.5, 1.8, 2.5, 2.85, 3.3 and 5. Output Current of 1A Operates Down to 1 Dropout Line Regulation:.2% Max. Load Regulation:.4%

More information

MIC33050. General Description. Features. Applications. Typical Application. 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load

MIC33050. General Description. Features. Applications. Typical Application. 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load 4MHz Internal Inductor PWM Buck Regulator with HyperLight Load General Description The Micrel is a high-efficiency 600mA PWM synchronous buck (step-down) regulator with internal inductor featuring HyperLight

More information

Baseband delay line QUICK REFERENCE DATA

Baseband delay line QUICK REFERENCE DATA FEATURES Two comb filters, using the switched-capacitor technique, for one line delay time (64 µs) Adjustment-free application No crosstalk between SECAM colour carriers (diaphoty) Handles negative or

More information

MP2259 1A, 16V, 1.4MHz Step-Down Converter

MP2259 1A, 16V, 1.4MHz Step-Down Converter MP59 1A, 1V, 1.MHz Step-Down Converter TM The Future of Analog IC Technology DESCRIPTION The MP59 is a monolithic integrated stepdown switch mode converter with an internal power MOSFET. It achieves 1A

More information

LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit

LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit Micropower Step-up DC/DC Converter with 550mA Peak Current Limit General Description The LM2704 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control

More information

Programmable Single-/Dual-/Triple- Tone Gong SAE 800

Programmable Single-/Dual-/Triple- Tone Gong SAE 800 Programmable Single-/Dual-/Triple- Tone Gong Preliminary Data SAE 800 Bipolar IC Features Supply voltage range 2.8 V to 18 V Few external components (no electrolytic capacitor) 1 tone, 2 tones, 3 tones

More information

DATA SHEET. TDA1543 Dual 16-bit DAC (economy version) (I 2 S input format) INTEGRATED CIRCUITS

DATA SHEET. TDA1543 Dual 16-bit DAC (economy version) (I 2 S input format) INTEGRATED CIRCUITS INTEGRATED CIRCUITS DATA SHEET File under Integrated Circuits, IC01 February 1991 FEATURES Low distortion 16-bit dynamic range 4 oversampling possible Single 5 V power supply No external components required

More information

MC33064DM 5 UNDERVOLTAGE SENSING CIRCUIT

MC33064DM 5 UNDERVOLTAGE SENSING CIRCUIT Order this document by MC3464/D The MC3464 is an undervoltage sensing circuit specifically designed for use as a reset controller in microprocessor-based systems. It offers the designer an economical solution

More information

TS555. Low-power single CMOS timer. Description. Features. The TS555 is a single CMOS timer with very low consumption:

TS555. Low-power single CMOS timer. Description. Features. The TS555 is a single CMOS timer with very low consumption: Low-power single CMOS timer Description Datasheet - production data The TS555 is a single CMOS timer with very low consumption: Features SO8 (plastic micropackage) Pin connections (top view) (I cc(typ)

More information

Analog & Digital Electronics Course No: PH-218

Analog & Digital Electronics Course No: PH-218 Analog & Digital Electronics Course No: PH-18 Lec 3: Rectifier and Clipper circuits Course nstructors: Dr. A. P. VAJPEY Department of Physics, ndian nstitute of Technology Guwahati, ndia 1 Rectifier Circuits:

More information

Theory of Operation. Figure 1 illustrates a fan motor circuit used in an automobile application. The TPIC2101. 27.4 kω AREF.

Theory of Operation. Figure 1 illustrates a fan motor circuit used in an automobile application. The TPIC2101. 27.4 kω AREF. In many applications, a key design goal is to minimize variations in power delivered to a load as the supply voltage varies. This application brief describes a simple DC brush motor control circuit using

More information

Designing With the SN54/74LS123. SDLA006A March 1997

Designing With the SN54/74LS123. SDLA006A March 1997 Designing With the SN54/74LS23 SDLA6A March 997 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without

More information

DIODE CIRCUITS LABORATORY. Fig. 8.1a Fig 8.1b

DIODE CIRCUITS LABORATORY. Fig. 8.1a Fig 8.1b DIODE CIRCUITS LABORATORY A solid state diode consists of a junction of either dissimilar semiconductors (pn junction diode) or a metal and a semiconductor (Schottky barrier diode). Regardless of the type,

More information

Transistor Amplifiers

Transistor Amplifiers Physics 3330 Experiment #7 Fall 1999 Transistor Amplifiers Purpose The aim of this experiment is to develop a bipolar transistor amplifier with a voltage gain of minus 25. The amplifier must accept input

More information

WHITE LED STEP-UP CONVERTER. Features

WHITE LED STEP-UP CONVERTER. Features General Description The is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain

More information

IR2154 SELF-OSCILLATING HALF-BRIDGE DRIVER. Features. Product Summary. Packages. Description. Typical Connection V OFFSET

IR2154 SELF-OSCILLATING HALF-BRIDGE DRIVER. Features. Product Summary. Packages. Description. Typical Connection V OFFSET Features Integrated 600V half-bridge gate driver 15.6V zener clamp on Vcc True micropower start up Tighter initial deadtime control Low temperature coefficient deadtime Shutdown feature (1/6th Vcc) on

More information

Bipolar Transistor Amplifiers

Bipolar Transistor Amplifiers Physics 3330 Experiment #7 Fall 2005 Bipolar Transistor Amplifiers Purpose The aim of this experiment is to construct a bipolar transistor amplifier with a voltage gain of minus 25. The amplifier must

More information

Interfacing To Alphanumeric Displays

Interfacing To Alphanumeric Displays Interfacing To Alphanumeric Displays To give directions or data values to users, many microprocessor-controlled instruments and machines need to display letters of the alphabet and numbers. In systems

More information

NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description

NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description NE555 SA555 - SE555 General-purpose single bipolar timers Features Low turn-off time Maximum operating frequency greater than 500 khz Timing from microseconds to hours Operates in both astable and monostable

More information

Diode Applications. As we have already seen the diode can act as a switch Forward biased or reverse biased - On or Off.

Diode Applications. As we have already seen the diode can act as a switch Forward biased or reverse biased - On or Off. Diode Applications Diode Switching As we have already seen the diode can act as a switch Forward biased or reverse biased - On or Off. Voltage Rectifier A voltage rectifier is a circuit that converts an

More information

MEETING TRANSIENT SPECIFICATIONS FOR ELECTRICAL SYSTEMS IN MILITARY VEHICLES

MEETING TRANSIENT SPECIFICATIONS FOR ELECTRICAL SYSTEMS IN MILITARY VEHICLES MEETING TRANSIENT SPECIFICATIONS FOR ELECTRICAL SYSTEMS IN MILITARY VEHICLES By Arthur Jordan Sr. Applications Engineer, Vicor Electrical systems in military vehicles are normally required to meet stringent

More information

MIC2940A/2941A. Features. General Description. Applications. Pin Configuration. 1.2A Low-Dropout Voltage Regulator

MIC2940A/2941A. Features. General Description. Applications. Pin Configuration. 1.2A Low-Dropout Voltage Regulator MIC294A/2941A 1.2A Low-Dropout oltage Regulator General Description The MIC294A and MIC2941A are bulletproof efficient voltage regulators with very low dropout voltage (typically 4 at light loads and 35

More information

28V, 2A Buck Constant Current Switching Regulator for White LED

28V, 2A Buck Constant Current Switching Regulator for White LED 28V, 2A Buck Constant Current Switching Regulator for White LED FP7102 General Description The FP7102 is a PWM control buck converter designed to provide a simple, high efficiency solution for driving

More information

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION OUT CFLY + CFLY - BOOT VREG FEEDCAP FREQ. July 2001 1/8

CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION OUT CFLY + CFLY - BOOT VREG FEEDCAP FREQ. July 2001 1/8 CLASS-D VERTICAL DEFLECTION AMPLIFIER FOR TV AND MONITOR APPLICATION FEATURES PRELIMINARY DATA HIGH EFFICIENCY POWER AMPLIFIER NO HEATSINK SPLIT SUPPLY INTERNAL FLYBACK GENERATOR OUTPUT CURRENT UP TO.5

More information

Single Supply Op Amp Circuits Dr. Lynn Fuller

Single Supply Op Amp Circuits Dr. Lynn Fuller ROCHESTER INSTITUTE OF TECHNOLOGY MICROELECTRONIC ENGINEERING Single Supply Op Amp Circuits Dr. Lynn Fuller Webpage: http://people.rit.edu/lffeee 82 Lomb Memorial Drive Rochester, NY 146235604 Tel (585)

More information

Features. Applications

Features. Applications LM555 Timer General Description The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the

More information

Design of a TL431-Based Controller for a Flyback Converter

Design of a TL431-Based Controller for a Flyback Converter Design of a TL431-Based Controller for a Flyback Converter Dr. John Schönberger Plexim GmbH Technoparkstrasse 1 8005 Zürich 1 Introduction The TL431 is a reference voltage source that is commonly used

More information

The D.C Power Supply

The D.C Power Supply The D.C Power Supply Voltage Step Down Electrical Isolation Converts Bipolar signal to Unipolar Half or Full wave Smoothes the voltage variation Still has some ripples Reduce ripples Stabilize the output

More information

AN ULTRA-CHEAP GRID CONNECTED INVERTER FOR SMALL SCALE GRID CONNECTION

AN ULTRA-CHEAP GRID CONNECTED INVERTER FOR SMALL SCALE GRID CONNECTION AN ULTRA-CHEAP GRID CONNECTED INVERTER FOR SMALL SCALE GRID CONNECTION Pramod Ghimire 1, Dr. Alan R. Wood 2 1 ME Candidate Email: pgh56@student.canterbury.ac.nz 2 Senior Lecturer: Canterbury University

More information

LM139/LM239/LM339 A Quad of Independently Functioning Comparators

LM139/LM239/LM339 A Quad of Independently Functioning Comparators LM139/LM239/LM339 A Quad of Independently Functioning Comparators INTRODUCTION The LM139/LM239/LM339 family of devices is a monolithic quad of independently functioning comparators designed to meet the

More information

AP2428.01. A/D Converter. Analog Aspects. C500 and C166 Microcontroller Families. Microcontrollers. Application Note, V 1.

AP2428.01. A/D Converter. Analog Aspects. C500 and C166 Microcontroller Families. Microcontrollers. Application Note, V 1. Application Note, V 1.0, May 2001 AP2428.01 A/D Converter C500 and C166 Microcontroller Families Analog Aspects Microcontrollers Never stop thinking. A/D Converter Revision History: 2001-05 V1.0 Previous

More information

Features. Applications. Transmitter. Receiver. General Description MINIATURE MODULE. QM MODULATION OPTIMAL RANGE 1000m

Features. Applications. Transmitter. Receiver. General Description MINIATURE MODULE. QM MODULATION OPTIMAL RANGE 1000m Features MINIATURE MODULE QM MODULATION OPTIMAL RANGE 1000m 433.05 434.79 ISM BAND 34 CHANNELS AVAILABLE SINGLE SUPPLY VOLTAGE Applications IN VEHICLE TELEMETRY SYSTEMS WIRELESS NETWORKING DOMESTIC AND

More information

Interfacing Analog to Digital Data Converters

Interfacing Analog to Digital Data Converters Converters In most of the cases, the PIO 8255 is used for interfacing the analog to digital converters with microprocessor. We have already studied 8255 interfacing with 8086 as an I/O port, in previous

More information

IR1168S DUAL SMART RECTIFIER DRIVER IC

IR1168S DUAL SMART RECTIFIER DRIVER IC Datasheet No PD97382 September 26, 2011 IR1168S DUAL SMART RECTIFIER DRIVER IC Features Secondary-side high speed controller for synchronous rectification in resonant half bridge topologies 200V proprietary

More information

IEC 1000-4-2 ESD Immunity and Transient Current Capability for the SP72X Series Protection Arrays

IEC 1000-4-2 ESD Immunity and Transient Current Capability for the SP72X Series Protection Arrays IEC 00-4-2 ESD Immunity and Transient Current Capability for the SP72X Series Protection Arrays Application Note July 1999 AN9612.2 Author: Wayne Austin The SP720, SP721, SP723, and SP724 are protection

More information

LM138 LM338 5-Amp Adjustable Regulators

LM138 LM338 5-Amp Adjustable Regulators LM138 LM338 5-Amp Adjustable Regulators General Description The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1 2V to 32V output range

More information

Understanding Power Impedance Supply for Optimum Decoupling

Understanding Power Impedance Supply for Optimum Decoupling Introduction Noise in power supplies is not only caused by the power supply itself, but also the load s interaction with the power supply (i.e. dynamic loads, switching, etc.). To lower load induced noise,

More information

LM2650 Synchronous Step-Down DC/DC Converter

LM2650 Synchronous Step-Down DC/DC Converter LM2650 Synchronous Step-Down DC/DC Converter General Description The LM2650 is a step-down DC/DC converter featuring high efficiency over a 3A to milliamperes load range. This feature makes the LM2650

More information

Let s examine the response of the circuit shown on Figure 1. The form of the source voltage Vs is shown on Figure 2. R. Figure 1.

Let s examine the response of the circuit shown on Figure 1. The form of the source voltage Vs is shown on Figure 2. R. Figure 1. Examples of Transient and RL Circuits. The Series RLC Circuit Impulse response of Circuit. Let s examine the response of the circuit shown on Figure 1. The form of the source voltage Vs is shown on Figure.

More information

STLQ015. 150 ma, ultra low quiescent current linear voltage regulator. Description. Features. Application

STLQ015. 150 ma, ultra low quiescent current linear voltage regulator. Description. Features. Application 150 ma, ultra low quiescent current linear voltage regulator Description Datasheet - production data Features SOT23-5L Input voltage from 1.5 to 5.5 V Very low quiescent current: 1.0 µa (typ.) at no load

More information

Output Ripple and Noise Measurement Methods for Ericsson Power Modules

Output Ripple and Noise Measurement Methods for Ericsson Power Modules Output Ripple and Noise Measurement Methods for Ericsson Power Modules Design Note 022 Ericsson Power Modules Ripple and Noise Abstract There is no industry-wide standard for measuring output ripple and

More information

12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER

12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER For most current data sheet and other product information, visit www.burr-brown.com 12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES SINGLE SUPPLY: 2.7V to 5V 4-CHANNEL INPUT

More information

SC728/SC729. 2A Low Vin, Very Low Ron Load Switch. POWER MANAGEMENT Features. Description. Applications. Typical Application Circuit SC728 / SC729

SC728/SC729. 2A Low Vin, Very Low Ron Load Switch. POWER MANAGEMENT Features. Description. Applications. Typical Application Circuit SC728 / SC729 POWER MANAGEMT Features Input Voltage Range 1.1V to 2A Continuous Output Current Ultra-Low Ron 36mΩ Automatic Output Discharge Circuit Fast Turn-on Option With No Output Discharge Circuit SC728 Extended

More information

7-41 POWER FACTOR CORRECTION

7-41 POWER FACTOR CORRECTION POWER FTOR CORRECTION INTRODUCTION Modern electronic equipment can create noise that will cause problems with other equipment on the same supply system. To reduce system disturbances it is therefore essential

More information

UC3842/UC3843/UC3844/UC3845

UC3842/UC3843/UC3844/UC3845 SMPS Controller www.fairchildsemi.com Features Low Start up Current Maximum Duty Clamp UVLO With Hysteresis Operating Frequency up to 500KHz Description The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode

More information

TEP 200WIR Series, 180 240 Watt

TEP 200WIR Series, 180 240 Watt TEP 200WIR Series, 180 240 Watt Features Chassis mount with screw terminal block Including EMI filter to meet EN 55022, class A Ultra wide 4:1 input voltage ranges 8.5 36, 16.5 75, 43 160 VDC EN 50155

More information

UNISONIC TECHNOLOGIES CO., LTD

UNISONIC TECHNOLOGIES CO., LTD UPS61 UNISONIC TECHNOLOGIES CO., LTD HIGH PERFORMANCE CURRENT MODE POWER SWITCH DESCRIPTION The UTC UPS61 is designed to provide several special enhancements to satisfy the needs, for example, Power-Saving

More information

MAX14760/MAX14762/MAX14764 Above- and Below-the-Rails Low-Leakage Analog Switches

MAX14760/MAX14762/MAX14764 Above- and Below-the-Rails Low-Leakage Analog Switches 19-652; Rev 1; 8/12 EVALUATION KIT AVAILABLE MAX1476// General Description The MAX1476// analog switches are capable of passing bipolar signals that are beyond their supply rails. These devices operate

More information

Discontinued Product For Reference Only

Discontinued Product For Reference Only Data Sheet 29319.12A 2962 DUAL PULSE-WIDTH MODULATED CURRENT CONTROL GROUND IN A SENSE A SINK A SOURCE A THS A V CC SOURCE B SINKB SENSEB IN B THS B 1 2 3 4 5 6 7 8 9 1 11 12 LOGIC LOGIC Dwg. No. D-11

More information

NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description

NE555 SA555 - SE555. General-purpose single bipolar timers. Features. Description NE555 SA555 - SE555 General-purpose single bipolar timers Features Low turn-off time Maximum operating frequency greater than 500 khz Timing from microseconds to hours Operates in both astable and monostable

More information