Timer Control for Triac and Relay U2100B

Transcription

1 Features Adjustable and Retriggerable Tracking Time Window Monitoring for Sensor Input Enable Input for Triggering Internal oise Suppression (0 ms) and Retrigger Blocking (60 ms) Two- or Three-wire Applications Applications Motion Detectors Touch Sensors Timers Description The timer control circuit U00B uses bipolar technology. It has different mode selections (zero voltage switch, phase control and relay control). The output stage is triggered according to input conditions. It can be used in triac application for two- or three-wire systems as a power switch. Timer Control for Triac and Relay U00B Rev.

2 Figure. Block Diagram with External Circuit C 8 0. Ref - Ref Supply voltage limitation oltage control monitoring Sync Mode selection - S C R R sync D Trigger signal Trigger window + - oise suppression 0 ms Retrigger delay 60 ms Control logic Output R G oad Z mains Enable C t Ref 0.6 Ref O 0. Ref OFF RC Oscillator Divider : 0 GD R t U00B

3 U00B Pin Configuration Figure. Pinning DIP8/SO8 GD 8 REF -S U00B 7 OSC OUTPUT 6 TRIG SYC E Pin Description Pin Symbol Function GD Reference point -S Supply voltage OUTPUT Driver output SYC Synchronization and mode selection E Enable 6 TRIG Input trigger signal 7 OSC RC oscillator 8 REF Reference voltage General Description The monostable integrated power-control circuit U00B can be used according to the mode selection in relay or triac applications. In addition, it can be used in triac applications for two-wire systems as power switch (the load in series to the switch), where the supply voltage for the control unit is gained from the remaining phase angle (α min operation). Figure. Two-wire Circuit Control

4 Figure. Three-wire Circuit Control For three-wire switch systems, two operational modes are possible: Zero voltage switch operation for triac control Static operation for relay control Mode Selection Pin and Supply oltage Pin Zero oltage Switch Operation (Figure ) The operational modes can be selected by the external voltage at the synchronous input pin (clamping). The mode selection determines the current requirement of the relay's or triac's driver stage and hence the selection of the supply voltage. Selection condition: = internal synchronous limitation, without external clamping R 0.8 M S I tot I tot = I S + I p + I X where: I S I P I X M = Supply current of the IC without load = Average trigger current I G = External circuit current requirement = Mains voltage Required firing pulse width t p t p --arcsin I M = ω P where: I P = Triac latching current = Power at load Z R sync [kω] M [] sin ( ω t p [s]) U00B

5 U00B Figure. Zero oltage Switch Operation - S D R C Sync R sync Z M Output R G GD I G DC Operation Selection condition (Figure 6): + = 6. - = internal limitation where: R 0 /0 X c X c 0.8 M S = I tot I tot = I S + I Rel + I X C 0 = ω X C Figure 6. DC Operation - S GD Output I Rel C Rel C 0 R 0 M 0 ~ R sync Sync

6 α min Operation Selection condition (Figure 7): - = 6. to = internal limitation.6 R αmax = R sync R(peak) 0 R αmin = R sync M 0 R(peak) is the peak voltage of the remaining phase angle, which should be high enough to generate the supply voltage, S. Figure 7. α min Operation (Two-wire Operation) D - S I 007 C 0 R0 Z C Sync R α 8 Rsync M 0 ~ 6.8 Output R(peak) GD R G I G C = 00 µf/ C o = 0. µf/0 ~ R o = 90 Ω R sync = 0 kω R α = 0 kω R G = 90 Ω D = I U00B

7 U00B Tracking Time Pin 7 An internal RC oscillator with a following divider stage : 0 allows a very long and reproducible tracking time. The RC values for the required final time, t t, can be calculated as follows: R t [Ω] = t s [s] C t [µf] C t [µf] = t s [s] R t [Ω] t t [s] = C t [µf] R t [Ω] Trigger Inputs Pins and 6 Two AD-connected, identical inputs determine the trigger conditions of the monostable time stages (Figure 8, Figure 9 on page 8), i.e., both inputs must be in position "O" so that the output is switched on. The tracking time starts after the trigger conditions have elapsed. The output O state is given until the tracking time has elapsed. Input pin is a simple comparator, whereas input pin 6 is designed as a window discriminator. The noise suppression for t O = 0 ms prevents peak noise signals at the inputs which could trigger the circuit. At the same time, the retrigger function is delayed for a duration of 60 ms (t OFF ) to avoid noise signal that may trigger the relay. Figure 8. Trigger Condition, Pin 0 OFF T = 0. Ref T = 0.6 Ref Hysteresis O Ref 7

8 Figure 9. Trigger Condition, Pin O T = 0. Ref T = 0.6 Ref OFF O Ref Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Pin Symbol alue Unit Supply Supply current Peak current t 0 ms -I S 0 -i s 60 Supply voltage - S Reference voltage source Output current 8 I O ma Synchronization Input current t 0 ms Window Monitoring ±I Sync. i Sync. 0 Input voltage 6 - Ref to 0 Enable Schmitt Trigger Input voltage - Ref to 0 Driver Output Collector voltage - o S to Storage temperature range T stg -0 to + C Junction temperature T j C Ambient temperature range T amb 0 to 00 C Thermal Resistance Parameters Symbol alue Unit Junction ambient DIP8 R thja 0 K/W SO8 on PC board R thja 0 K/W SO8 on ceramic R thja 0 K/W ma ma ma ma 8 U00B

9 U00B Electrical Characteristics S = -8, T amb = C, reference point pin, unless otherwise specified. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Supply-voltage limitation I S = 800 µa I S = ma - S - S. Current consumption I = 0 -I S 70 µa Supply-voltage Monitoring O-threshold - S OFF-threshold - S 6. Reference voltage I 8 = 0. ma I 8 =. ma 8 Synchronization - Ref.9 - Ref.7 Input current ±i sync 0.. ma oltage limitation I = ± ma ± sync Remaining phase angle α min threshold O Off Zero identification Zero identification O OFF ± T ± T.6.8 Operation Selection Zero voltage switch ± sync limit + α min operation sync limit - sync 6. to 7.8 DC mode - sync limit + sync 6. to 7.8 Window Monitoring, Figure 9 on page 8 6 Threshold - I / Ref Threshold - I / Ref Enable Schmitt Trigger, Figure 8 on page 7 Threshold OFF - I / Ref Threshold O - I / Ref Oscillator f = R t C t Threshold 7 - I / Ref Threshold 7-8 I m Input current 7 I I na Output Stage Saturation voltage I = 00 ma - Output current I 00 ma ± T ±I T ± T ±I T µa µa 9

10 Applications Figure 0. amp Time Control 8 Seconds to Minutes for Two-wire Systems 8 Triac C 0 90 Ω 007 D - 0 nf S 7 R 0 0 nf U00B 90 Ω C 6 R Timer start R S 0 kω/0. W D kω R 7 0 kω R kω 8 Tracking R D C 6 + D time R C. 00 µf. MΩ -.7 µf Figure. Fan Tracking Time Control 8 Seconds to Minutes M R 7 00 kω C 6 7 U00B R 00 kω 0 nf 90 Ω C0 R 0 0 nf 8 S R kω D C 00 kω C.7 µf R 6 R. MΩ D 00 µf RE 000 Ω Tracking time adjustment S open, motor starts 0 U00B

11 U00B Ordering Information Extended Type umber Package Remarks U00B-x DIP8 Tube U00B-xFP SO8 Tube U00B-xFPG SO8 Taped and reeled Package Information Package DIP8 Dimensions in mm max min. 6. max 0.6 max technical drawings according to DI sp ec ifica tio n s

12 Package SO8 Dimensions in mm technical drawings according to DI specifications Revision History Changes from Rev. 769A - 0/0 to Rev. 769B - /0 Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document.. Put datasheet in a new template.. Table Electrical Characteristics on page 9 changed. U00B

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