VIPer12ADIP VIPer12AS

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1 VIPer12ADIP VIPer12AS LOW POWER OFF LINE SMPS PRIMARY SWITCHER TYPICAL POWER CAPABILITY Mains ype SO-8 DIP8 European ( Vac) 8 W 13 W US / Wide range ( Vac) 5 W 8 W n FIXED 60 KHZ SWITCHING FREQUENCY n 9V TO 38V WIDE RANGE V DD VOLTAGE n CURRENT MODE CONTROL n AUXILIARY UNDERVOLTAGE LOCKOUT WITH HYSTERESIS n HIGH VOLTAGE START UP CURRENT n OVERTEMPERATURE, OVERCURRENT AND OVERVOLTAGE PROTECTION WITH AUTORESTART DESCRIPTION The VIPer12A combines a dedicaed curren mode PWM conroller wih a high volage Power SO-8 DIP-8 ORDER CODES PACKAGE TUBE T&R SO-8 VIPer12AS VIPer12AS13TR DIP-8 VIPer12ADIP MOSFET on he same silicon chip. Typical applicaions cover off line power supplies for baery charger adapers, sandby power supplies for TV or moniors, auxiliary supplies for moor conrol, ec. The inernal conrol circui offers he following benefis: Large inpu volage range on he V DD pin accommodaes changes in auxiliary supply volage. This feaure is well adaped o baery charger adaper configuraions. Auomaic burs mode in low load condiion. Overvolage proecion in hiccup mode. BLOCK DIAGRAM REGULATOR ON/OFF 60kHz OSCILLATOR INTERNAL SUPPLY OVERTEMP. DETECTOR R1 R2 S FF R3 PWM LATCH Q R4 VDD 8/14.5V _ + BLANKING + _ 0.23 V 42V + _ S R FF Q OVERVOLTAGE LATCH 230 Ω 1 kω November /15

2 PIN FUNCTION Name V DD CURRENT AND VOLTAGE CONVENTIONS Funcion Power supply of he conrol circuis. Also provides a charging curren during sar up hanks o a high volage curren source conneced o he drain. For his purpose, an hyseresis comparaor moniors he V DD volage and provides wo hresholds: - V DDon : Volage value (ypically 14.5V) a which he device sars swiching and urns off he sar up curren source. - V DDoff : Volage value (ypically 8V) a which he device sops swiching and urns on he sar up curren source. Power MOSFET source and circui ground reference. Power MOSFET drain. Also used by he inernal high volage curren source during sar up phase for charging he exernal V DD capacior. Feedback inpu. The useful volage range exends from 0V o 1V, and defines he peak drain MOSFET curren. The curren limiaion, which corresponds o he maximum drain curren, is obained for a pin shored o he pin. I DD I D V DD I VDD CONTROL V D V VIPer12A CONNECTION DIAGRAM VDD 4 5 VDD 4 5 SO-8 DIP8 2/15

3 ABSOLUTE MAXIMUM RATINGS Symbol Parameer Value Uni V DS(sw) Swiching Drain Source Volage (T j = C) (See noe 1) V V DS(s) Sar Up Drain Source Volage (T j = C) (See noe 2) V I D Coninuous Drain Curren Inernally limied A V DD Supply Volage V I Feedback Curren 3 ma V ESD Noe: 1. This parameer applies when he sar up curren source is off. This is he case when he V DD volage has reached V DDon and remains above V DDoff. 2. This parameer applies when he sar up curren source is on. This is he case when he V DD volage has no ye reached V DDon or has fallen below V DDoff. THERMAL DATA Elecrosaic Discharge: Machine Model (R=0Ω; C=200pF) Charged Device Model T j Juncion Operaing Temperaure Inernally limied C T c Case Operaing Temperaure -40 o 150 C T sg Sorage Temperaure -55 o 150 C Symbol Parameer Max Value Uni Rhj-case Rhj-amb Thermal Resisance Juncion-Pins for: SO-8 DIP8 Thermal Resisance Juncion-Ambien for: SO-8 (See noe 1) DIP8 (See noe 1) Noe: 1. When mouned on a sandard single-sided FR4 board wih 200 mm² of Cu (a leas 35 µm hick) conneced o all pins. ELECTRICAL CHARACTERISTICS (T j =25 C, V DD =18V, unless oherwise specified) POWER SECTION Symbol Parameer Tes Condiions Min. Typ. Max. Uni BV DSS Drain-Source Volage I D =1mA; V =2V 730 V I DSS Off Sae Drain Curren V DS =500V; V =2V; T j =125 C 0.1 ma R DSon f Saic Drain-Source On Sae Resisance Fall Time Noe: 1. On clamped inducive load I D =0.2A I D =0.2A; T j =100 C I D =0.1A; V IN =300V (See fig.1) (See noe 1) V kv C/W C/W Ω 100 ns r Rise Time I D =0.2A; V IN =300V (See fig.1) (See noe 1) 50 ns C oss Drain Capaciance V DS =25V 40 pf 3/15

4 ELECTRICAL CHARACTERISTICS (T j =25 C, V DD =18V, unless oherwise specified) SUPPLY SECTION Symbol Parameer Tes Condiions Min. Typ. Max. Uni I Sar Up Charging DDch VDS=100V; V Curren DD =5V...V DDon (See fig. 2) -1 ma I DDoff Sar Up Charging Curren in Thermal Shudown V DD =5V; V DS =100V T j > T SD - T HYST 0 ma I Operaing Supply Curren DD0 No Swiching I =2mA 3 5 ma I Operaing Supply Curren DD1 Swiching I =0.5mA; I D =50mA (Noe 1) 4.5 ma D RST Resar Duy Cycle (See fig. 3) 16 % V V DD Undervolage DDoff Shudown Threshold (See fig. 2 & 3) V V DDon V DD Sar Up Threshold (See fig. 2 & 3) V V V DD Threshold DDhys Hyseresis (See fig. 2) V V V DD Overvolage DDovp Threshold V Noe: 1. These es condiions obained wih a resisive load are leading o he maximum conducion ime of he device. OSCILLATOR SECTION Symbol Parameer Tes Condiions Min. Typ. Max. Uni F Oscillaor Frequency OSC V Toal Variaion DD =V DDoff... 35V; T j = C khz PWM COMPARATOR SECTION Symbol Parameer Tes Condiions Min. Typ. Max. Uni G ID I o I D Curren Gain (See fig. 4) 320 I Dlim Peak Curren Limiaion V =0V (See fig. 4) A I sd I Shudown Curren (See fig. 4) 0.9 ma R Pin Inpu Impedance I D =0mA (See fig. 4) 1.2 kω Curren Sense Delay o d Turn-Off I D =0.2A 200 ns b Blanking Time 500 ns ONmin Minimum Turn On Time 700 ns OVERTEMPERATURE SECTION Symbol Parameer Tes Condiions Min. Typ. Max. Uni T Thermal Shudown SD Temperaure (See fig. 5) C T Thermal Shudown HYST Hyseresis (See fig. 5) 40 C 4/15

5 Figure 1 : Rise and Fall Time I D C << Coss C L D V DS VDD 90% CONTROL 300V fv rv VIPer12A 10% Figure 2 : Sar Up VDD Curren I DD I DD0 V DDhys V DDoff V DDon V DD I DDch VDS = 100 V F sw = 0 khz Figure 3 : Resar Duy Cycle V DD V DDon VDD V DDoff 10µF CONTROL 100V CH ST ST D = RST ST + CH 2V VIPer12A 5/15

6 Figure 4 : Peak Drain Curren Vs. Feedback Curren 100V I D 4mH I Dpeak 1/F OSC 18V VDD CONTROL 100V I 47nF VIPer12A V I R sd The drain curren limiaion is obained for V = 0 V, and a negaive curren is drawn from he pin. See he Applicaion secion for furher deails. I I Dpeak I Dlim I Dpeak G = ID I I 0 I sd Figure 5 : Thermal Shudown T j T SD T HYST V DD V DDon Auomaic sar up 6/15

7 Figure 6 : Swiching Frequency vs Temperaure 1.01 Vdd = 10V... 35V Normalized Frequency Temperaure ( C) Figure 7 : Curren Limiaion vs Temperaure Normalized Curren Limiaion Vin = 100V Vdd = 20V Temperaure ( C) 7/15

8 Figure 8 : Recangular U-I oupu characerisics for baery charger DCOUT R1 C2 D1 T1 D2 C1 AC IN F1 C3 T2 - + D4 C4 C5 ISO1 U1 VDD CONTROL D3 C6 VIPerX2A C7 R2 D5 R3 U2 Vcc R4 Vref R5 C8 C9 R6 C R7 R8 TSM101 GND R9 R10 GND RECTANGULAR U-I OUTPUT CHARACTERISTIC A complee regulaion scheme can achieve combined and accurae oupu characerisics. Figure 8 presens a secondary feedback hrough an opocoupler driven by a TSM101. This device offers wo operaional amplifiers and a volage reference, hus allowing he regulaion of boh oupu volage and curren. An inegraed OR funcion performs he combinaion of he wo resuling error signals, leading o a dual volage and curren limiaion, known as a recangular oupu characerisic. This ype of power supply is especially useful for baery chargers where he oupu is mainly used in curren mode, in order o deliver a defined charging rae. The accurae volage regulaion is also convenien for Li-ion baeries which require boh modes of operaion. WIDE RANGE OF V DD VOLTAGE The V DD pin volage range exends from 9V o 38V. This feaure offers a grea flexibiliy in design o achieve various behaviors. In figure 8 a forward configuraion has been chosen o supply he device wih wo benefis: as soon as he device sars swiching, i immediaely receives some energy from he auxiliary winding. C5 can be herefore reduced and a small ceramic chip (100 nf) is sufficien o insure he filering funcion. The oal sar up ime from he swich on of inpu volage o oupu volage presence is dramaically decreased. he oupu curren characerisic can be mainained even wih very low or zero oupu volage. Since he TSM101 is also supplied in forward mode, i keeps he curren regulaion up whaever he oupu volage is.the V DD pin volage may vary as much as he inpu volage, ha is o say wih a raio of abou 4 for a wide range applicaion. 8/15

9 FEEDBACK PIN PRINCIPLE OF OPERATION A feedback pin conrols he operaion of he device. Unlike convenional PWM conrol circuis which use a volage inpu (he invered inpu of an operaional amplifier), he pin is sensiive o curren. Figure 9 presens he inernal curren mode srucure. The Power MOSFET delivers a sense curren I s which is proporional o he main curren Id. R2 receives his curren and he curren coming from he pin. The volage across R2 is hen compared o a fixed reference volage of abou 0.23 V. The MOSFET is swiched off when he following equaion is reached: R 2 ( I S + I ) = 0.23V By exracing I S : 0.23V I S = I R 2 Using he curren sense raio of he MOSFET G ID : 0.23V I D = G ID I S = G ID I R 2 The curren limiaion is obained wih he pin shored o ground (V = 0 V). This leads o a negaive curren sourced by his pin, and expressed by: 0.23V I = R 1 By reporing his expression in he previous one, i is possible o obain he drain curren limiaion I Dlim : 1 1 I Dlim = G ID 0.23V R 2 R 1 Figure 9 : Inernal Curren Conrol Srucure Secondary feedback +Vdd 60kHz OSCILLATOR S PWM LATCH R Q Id In a real applicaion, he pin is driven wih an opocoupler as shown on figure 9 which acs as a pull up. So, i is no possible o really shor his pin o ground and he above drain curren value is no achievable. Neverheless, he capacior C is averaging he volage on he pin, and when he opocoupler is off (sar up or shor circui), i can be assumed ha he corresponding volage is very close o 0 V. For low drain currens, he formula (1) is valid as long as I saisfies I < I sd, where I sd is an inernal hreshold of he VIPer12A. If I exceeds his hreshold he device will sop swiching. This is represened on figure 4, and I sd value is specified in he PWM COMPARATOR SECTION. Acually, as soon as he drain curren is abou 12% of Idlim, ha is o say 50 ma, he device will ener a burs mode operaion by missing swiching cycles. This is especially imporan when he converer is lighly loaded. I is hen possible o build he oal DC ransfer funcion beween I D and I as shown on figure 10. This figure also akes ino accoun he inernal blanking ime and is associaed minimum urn on ime. This imposes a minimum drain curren under which he device is no more able o conrol i in a linear way. This drain curren depends on he primary inducance value of he ransformer and he inpu volage. Two cases may occur, depending on he value of his curren versus he fixed 50 ma value, as described above. START UP SEQUENCE This device includes a high volage sar up curren source conneced on he drain of he device. As soon as a volage is applied on he inpu of he converer, his sar up curren source is acivaed as long as V DD is lower han V DDon. When reaching V DDon, he sar up curren source is swiched off and he device begins o operae by urning on and off is main power MOSFET. As he pin does no receive any curren from he opocoupler, he device operaes a full curren capaciy and he oupu volage rises unil reaching Figure 10 : I Transfer funcion I Dpeak I 0.23V 1 kω R1 Is I Dlim C 230 Ω R2 V 1 ONmin IN L 50mA V 2 ONmin IN L 0 Par masked by he I sd hreshold I sd I 9/15

10 Figure 11 : Sar Up Sequence Figure 12 : Overvolage Sequence V DD V DD V DDon V DDovp V DDoff V DDon ss V DDoff I V DS V OUT he regulaion poin where he secondary loop begins o send a curren in he opocoupler. A his poin, he converer eners a regulaed operaion where he pin receives he amoun of curren needed o deliver he righ power on secondary side. This sequence is shown in figure 11. Noe ha during he real saring phase ss, he device consumes some energy from he V DD capacior, waiing for he auxiliary winding o provide a coninuous supply. If he value of his capacior is oo low, he sar up phase is erminaed before receiving any energy from he auxiliary winding and he converer never sars up. This is illusraed also in he same figure in dashed lines. OVERVOLTAGE THRESHOLD An overvolage deecor on he V DD pin allows he VIPer12A o rese iself when V DD exceeds V DDovp. This is illusraed in figure 12, which shows he whole sequence of an overvolage even. Noe ha his even is only lached for he ime needed by V DD o reach V DDoff, and hen he device resumes normal operaion auomaically. 10/15

11 SO-8 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A a a a b b C c1 45 (yp.) D E e e F L M S 8 (max.) L /15 1

12 Plasic DIP-8 MECHANICAL DATA DIM. mm. MIN. TYP MAX. A 5.33 A A b b c D E E e 2.54 ea 7.62 eb L Package Weigh Gr. 470 P001 12/15

13 SO-8 TUBE SHIPMENT (no suffix) B C A Base Q.y 100 Bulk Q.y 2000 Tube lengh (± 0.5) 532 A 3.2 B 6 C (± 0.1) 0.6 All dimensions are in mm. TAPE AND REEL SHIPMENT (suffix 13TR ) REEL DIMENSIONS Base Q.y 2500 Bulk Q.y 2500 A (max) 330 B (min) 1.5 C (± 0.2) 13 F 20.2 G (+ 2 / -0) 12.4 N (min) 60 T (max) 18.4 All dimensions are in mm. TAPE DIMENSIONS According o Elecronic Indusries Associaion (EIA) Sandard 481 rev. A, Feb 1986 Tape widh W 12 Tape Hole Spacing P0 (± 0.1) 4 Componen Spacing P 8 Hole Diameer D (± 0.1/-0) 1.5 Hole Diameer D1 (min) 1.5 Hole Posiion F (± 0.05) 5.5 Comparmen Deph K (max) 4.5 Hole Spacing P1 (± 0.1) 2 All dimensions are in mm. End Sar Top cover ape No componens 500mm min Componens Empy componens pockes saled wih cover ape. No componens 500mm min User direcion of feed 13/15 1

14 DIP-8 TUBE SHIPMENT (no suffix) A C B Base Q.y 20 Bulk Q.y 1000 Tube lengh (± 0.5) 532 A 8.4 B 11.2 C (± 0.1) 0.8 All dimensions are in mm. 14/15 1

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