CoolSET F3 Latch & Jitter Mode ICE3A1065LJ. 6 th Sept., Beijing. Infineon. Tim Hu. 7Apr06 Page 1. Page 1

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1 CoolSET F3 Latch & Jitter Mode ICE3A1065LJ Infineon 7Apr06 Page 1 Page 1 6 th Sept., Beijing

2 Infineon Integrated Power IC - CoolSET TM AC ~ V o DC IC T 2 CoolSET TM F3 Depl CoolMOS PWM IC 7Apr06 Page 2 Page 2

3 ICE3A1065LJ A : 100 KHz 10 : 1A ( Rdson = 2.95O typ 25ºC, Pin = 16W ) 65 : Tj = 110ºC LJ : latch and jitter mode Package : DIP8 Application : DVD, STB, Game console, charger, etc. 7Apr06 Page 3 Page 3

4 Product highlights Remained good features : Active burst mode : lowest standby power Propagation delay compensation : good power control ( HL/LL ) Soft gate drive : better EMI performance Latched protection for serious fault ( Vcc OVP, OTP, short winding ) Auto-restart protection for general fault ( OLP, Open loop, etc ) 7Apr06 Page 4 Page 4 New features : Built-in soft start ( 20ms ) Built-in blanking window ( 20ms ) with window extension Frequency jitter with built-in jitter period ( 4ms ) External latch enable pin ( V BL < 0.1V )

5 Block Diagram 7Apr06 Page 5 Page 5

6 Soft- start Behavior Vin = 85Vac Vin = 265Vac 7Apr06 Page 6 Page 6 Constant charge current, Icharge, is delivered by startup cell to charge up Vcc capacitor The controller is switched on when Vcc reaches approximately 18.0V Soft start time measured approximately 21ms which is a built-in feature and is independent from AC line

7 Active Burst Mode Active means the Controller is continously monitoring the Feedback Input The Active Burst Mode is only controlled by the FB-Signal Therefore immediate response on load jumps without large voltage drop of V OUT No audible noise Lowest Power Consumption during Active Burst Mode 7Apr06 Page 7 Page 7

8 Active Burst Mode Operation Entering burst mode condition: V FB <1.35V Built-in 20ms blanking time Working in burst mode: Burst on : V FB reaches 3.6V Burst off : V FB is down to 3.0V. During burst on, V CS =0.32V Vcc > Vccoff (10.5V typical) Leaving burst mode: V FB reaches 4.5V 7Apr06 Page 8 Page 8

9 Burst mode Operation (Cont ) Enter burst mode power P 2 burst_ enter = 0.5 LP ( ) Rsense K OTA K OTA 1.35V 0.6V IC internal gain, 3.2 typical f SW Output ripple during burst mode V out _ ripple_ pp G CTR = R FB G R opto CTR K TL431 (3.6V 3.0V ) Optocoupler current transfer gain 7Apr06 Page 9 Page 9 Leaving burst mode power P 1V 2 burst_ leaving = 0.5 LP (0.32 ) Rsense f SW

10 Burst mode --- output voltage drop when leaving burst mode 4.5V 3.6V V FB 3.0V V out V out_av V out_drop_max 1V V CS 0.32V 7Apr06 Page 10 Page 10 V out _ drop _ max = R FB G R opto CTR K TL431 ( )

11 Blanking window during over load ( basic and extendable ) Basic blanking time during over load Extendable blanking time during over load 0.22uF capacitor added to BL pin to ground 7Apr06 Page 11 Page 11 Controller enters into Auto Restart Mode when V FB > 4.5V and V BL > 4V. Basic blanking time ( left ) : no C BK capacitor added to BL pin, the over load blanking time is 21ms ( built-in ). Extended blanking time ( right ) : 0.22uF capacitor connected to the BL pin, the over load blanking time is extended to 125ms ( 21ms + 104ms ). The V BL will charge up from 0.9V to 4.0V before entering auto-restart mode.

12 Current Mode Control V FB [V] i pk = t on V Lp IN V IN I Primary I Secondary I pk Comp. Logic DRV. V FB t t csth t on Transferred Power: t csth 1 = Lp Ipk f η 2 P OUT 2 Feedback voltage V FB controls the output power P OUT 7Apr06 Page 12 Page 12 No dependency on input voltage V IN Features & Applications

13 Current overshoot minimization i pk = V IN ( t + on L P t csth ) P OUT 1 2 = LP i pk f 2 η i pk [A] 230V Current overshoot dependent on di/dt 160V 85V I Limit t 7Apr06 Page 13 Page 13 t on Features & Applications t csth

14 Current overshoot minimization Patented Function 7Apr06 Page 14 Page 14 Features & Applications

15 Frequency Jittering 3.52V 96.2KHz 103.5KHz 7Apr06 Page 15 Page 15 Switching frequency = 100KHz Frequency jittering = +/-4% ( +/-4KHz ) Frequency jitter period, T FJ = 4ms Measured jittering period is 96.2Hz ~ 103.5KHz

16 BL pin < 0.1V ( external latch off enable ) 7Apr06 Page 16 Page 16 External latch enable pin is triggered by applying a voltage to the base of latch enable transistor, T LE. V BL < 0.1V, IC enters latch off mode.

17 Protection Features Protection functions Failure condition Latch & Jitter ICE3A1065LJ V CC Overvoltage V CC > 24V, and V FB > 4.5V Latch Off Latch Off Mode Over temperature Short winding / Short diode T J > 130 O C V CS > 1.66V Latch Off Latch Off BL pin < 0.1V V BL < 0.1V Latch Off 7Apr06 Page 17 Page 17 Auto Restart Mode Output Overload / Output Short Circuit Open Loop V CC Undervoltage / short Optocoupler V FB > 4.5V, V BL > 4.0V, ( after built-in / extendable blanking time) > Output Overload V CC < 10.5V Auto Restart Auto Restart Auto Restart

18 Summary to ICE3A1065LJ Small package --- DIP-8 Wide Vcc operating range --- BiCMOS technology Lowest standby power --- startup cell & active burst mode Robust protection --- latch off and Auto-restart Flexible protection feature --- external latch off enable pin Accurate current limit --- propagation delay compensation Low EMI performance --- frequency jitter mode & soft gate drive Reduced voltage stress --- built-in soft start 7Apr06 Page 18 Page 18 Flexible in high load jump application --- built-in and extendable blanking time

19 F3 Latch & Jitter VS F3 Jitter and F3 General 7Apr06 Page 19 Page 19

20 F3 Latch & Jitter VS F3 Jitter and F3 Parameters 7Apr06 Page 20 Page 20

21 F3 Latch & Jitter VS F3 Jitter and F3 Formulars 7Apr06 Page 21 Page 21

22 F3 Latch & Jitter VS F3 Jitter and F3 Protection 7Apr06 Page 22 Page 22

23 F3 Latch & Jitter VS F3 Jitter and F3 Active Burst Mode 7Apr06 Page 23 Page 23

24 (DIP8) 15W 5V Demo board Report ( Rev 0.1 ) ICE3A1065LJ GE618L0P Off-Line SMPS Controller with Integrated 650 V CoolMOS 7Apr06 Page 24 Page 24

25 Demoboard for 15.0W using ICE3A1065LJ Vin = 85Vac ~ 269Vac Po = 15.0W ( 5V, 3.0A ) Demoboard : modified from 12W ( 5V 2.4A ) ICE3B0565J Demoboard CoolSET to be verified : ICE3A1065LJ 7Apr06 Page 25 Page 25

26 Circuit Diagram ( 15.0W 5V using ICE3A1065LJ ) C4 2.2nF/250V, Y1 C23 * R21 * L 85V - 265Vac N F1 3.15A C1 0.1uF/275V L1 EMI 2 x 27mH, 0.5A BR1 2KBB40 + C2 47uF/400V R1 150k/2W D1 UF4005 C3 2n2F/400V 5 66T 3 TR D21 MBR745 L21 1.5uH + C uF/35V + C22 470uF/35V 5V/3.0A GND 4 C5 + ZD1 R3 R2 22u/25V 2 20V 39R 510R D2 13T C7 C6 0.1u # 1 BL 7 Vcc IC1 ICE3A1065LJ 5 DRAIN DRAIN 4 1N Lp=520uH 0.22uF GND 8 FB 2 3 CS Rc6 100 Rc5 1K Cc2 1nF Cc1 1uF Rc1 10k Rc2 0R C8 1nF R4 1.2R R4A 27R IC2 SFH617A-3 IC3 TL431 Rc4 6.8k Rc3A * Rc3 10k 7Apr06 Page 26 Page 26 15W 5V SMPS Demoboard with ICE3A1065LJ ( Modified from ICE3B0565J demo board ) Eric Kok /9 June 06

27 Start- up Behavior With 3.0A Load Vin Vin = = 85Vac Vin = 265Vac 7Apr06 Page 27 Page 27 Constant charge current, Icharge, is delivered by startup cell to charge up Vcc capacitor The controller is switched on when Vcc reaches approximately 18.0V Startup delay time is independent from AC line input voltage and approximately 0.59s

28 Soft- start Behavior With 3.0A Load Vin Vin = = 85Vac Vin = 265Vac 7Apr06 Page 28 Page 28 Constant charge current, Icharge, is delivered by startup cell to charge up Vcc capacitor The controller is switched on when Vcc reaches approximately 18.0V Soft start time measured approximately 19ms which is a built-in feature and is independent from AC line

29 Jittering Mode Vin Vin = = 265Vac 85Vac Vin = 265Vac 85Vac At 85Vac, during Normal Mode Operation, the controller is operating with a frequency of approximately 95.9kHz to 102.6kHz 7Apr06 Page 29 Page 29

30 Entering Active Burst Mode From 3.0A to 0.05A Load Vin Vin = = 85Vac Vin Vin = = 265Vac 7Apr06 Page 30 Page 30 Active Burst Mode is entered when Vfb is below 1.35V for certain blanking time. The measured built-in blanking time is approximately 19.2 ms

31 In Active Burst Mode Current Sense Vin Vin = = 85Vac Vin = 265Vac In Active Burst Mode, Vcs is about 0.31V 7Apr06 Page 31 Page 31

32 In Active Burst Mode Output Ripple Vin Vin = = 85Vac Vin = 265Vac In Active Burst Mode, output ripple of Vo is approximately 50mV 7Apr06 Page 32 Page 32

33 In Active Burst Mode Vin = 85Vac Vin = 265Vac In Active Burst Mode, Vfb is changing like a saw tooth between approximately 2.8V to 3.6V 7Apr06 Page 33 Page 33

34 Leaving Burst Mode 0.05A Load to 3.0A Load Vin = 85Vac Vin = 265Vac Vin = 265Vac 7Apr06 Page 34 Page 34 When Vfb exceeds 4.5V, the controller leaves Active Burst Mode and returns to Normal Mode

35 Open Loop Protection At 3.0A Load (Auto Restart Mode) Vin Vin = 85Vac 85Vac Vin Vin = = 265Vac 265Vac 7Apr06 Page 35 Page 35 Circuit is open looped by disconnecting Rcc1 Controller enters into Auto Restart Mode when Vfb and Vbl exceeds 4.5V and 4V respectively A blanking time of approximately 19.8ms before Auto Restart Mode

36 Over Load Protection Blanking Time (Auto Restart Mode) Vin = 85Vac Vin = 85Vac Vin = 265Vac Vin = 265Vac 7Apr06 Page 36 Page 36 Over Load Protection test is conducted by increasing load from 3.0A to 4A. Blanking time is approximately 19.9ms Controller enters into Auto Restart Mode when Vfb and Vbl exceeds 4.5V and 4V respectively

37 Over Load Protection Extended Blanking (Auto Restart Mode) Vin = 85Vac Vin = 85Vac Vin = 265Vac Vin = 265Vac 7Apr06 Page 37 Page 37 Over Load Protection test is conducted by increasing load from 3.0A to 4A. Blanking time is approximately 125ms ( 21ms + 105ms ) after adding a 0.22uF capacitor at C BL or C7 Controller enters into Auto Restart Mode when Vfb and Vbl exceeds 4.5V and 4V respectively

38 Over Load Protection Extended Burst Period (Auto Restart Mode) Vin = 85Vac Vin = 85Vac Vin = 265Vac Vin = 265Vac The burst period is approximately 1.85s 7Apr06 Page 38 Page 38

39 Short Optocoupler Protection Blanking Time (Auto Restart Mode) Vin = 85Vac Vin = 265Vac 7Apr06 Page 39 Page 39 Short opto-coupler is done by shorting the diode of the opto-coupler. Blanking Time is approximately 19.4ms Controller enters into Auto Restart Mode when Vfb and Vbl exceeds 4.5V and 4V respectively

40 Vcc turnon- turnoff threshold Vin = Vin 85Vac = 85Vac Vin = 265Vac Vin = 265Vac During auto-restart mode, Vcc turns on at 18.0V and turns off at 10.3V 7Apr06 Page 40 Page 40

41 Vcc Overvoltage Protection (Latched Off Mode) Vin Vin = = 85Vac 85Vac Vin Vin = 265Vac 265Vac 7Apr06 Page 41 Page 41 Test is done at system startup where the control loop is opened by breaking the Rcc1 and at very light load. Vcc exceeds 24V and Vfb has to exceed 5V, then system latch off.

42 External latch enable ( BL pin < 0.1V ) Vin = 85Vac Vin = 265Vac 7Apr06 Page 42 Page 42 Verification is done by shorting the BL pin to ground. In real application, a npn transistor, T LE should be triggered. When V BL < 0.1V, the IC will enter latch off mode.

43 Electrical performance Line/Load regulation and efficiency V in ( V ac ) I in ( A ) P in ( W ) V o ( V dc ) I o ( A ) P o ( W ) Efficiency (%) Apr06 Page 43 Page

44 Electrical performance - Standby Input Power at 0W and 0.5W load Input Power (mw) Vin (Vac) No Load 0.5W Load 7Apr06 Page 44 Page 44

45 Thank You Questions! & Answers 7Apr06 Page 45 Page 45 Tel: