8ピン擬似共振制御グリーン･モード･コントローラ

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1 UCC8600 µ TYPICAL APPLICATION Primary Secondary C BULK R SU N P NS R DD Q ST N B R ST R ST1 C DD R OVP1 UCC8051 C SS 18 V 1 UCC8600 SS STATUS 8 1 VO_SNS VCC 8 FB OVP 7 COMP DRV 7 3 CS VDD 6 R OVP M1 3 MULTIN GND 6 Feedback 4 GND OUT 5 4 CS ZCD 5 C BP R PL R CS TL431

2 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted (1) UCC8600 UNIT V DD Supply voltage range I DD <0mA 3 V I DD Supply current 0 ma I OUT(sink) Output sink current (peak) 1. I OUT(source) Output source current (peak) -0.8 A Analog inputs FB, CS, SS 0.3 to 6.0 V OVP 1.0 to 6.0 V I OVP(source) 1.0 ma V STATUS VDD =0Vto30V 30 V Power dissipation SOIC-8 package, T A =5 C 650 mw T J Operating junction temperature range 55 to 150 T stg Storage temperature 65 to 150 C T LEAD Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300 MIN NOM MAX UNIT V DD Input voltage 1 V I OUT Output sink current 0 A T J Operating junction temperature C ELECTROSTATIC DISCHARGE (ESD) PROTECTION MIN MAX UNIT Human body model 000 V CDM 1500

3 ELECTRICAL CHARACTERISTICS VDD = 15 V, 0.1-µF capacitor from VDD to GND, 3.3-nF capacitor from SS to GND charged over 3.5 V, 500-Ω resistor from OVP to 0.1V, FB = 4.8 V, STATUS = not connected, 1-nF capacitor from OUT to GND, CS = GND, T A =T J = 40 C to 105 C, PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Overall I STARTUP Startup current V DD =V UVLO 0.3 V 1 5 I STANDBY Standby current V FB =0V µa I DD Operating current Not switching khz, QR mode ma VDD clamp FB = GND, I DD =10mA V Undervoltage Lockout V DD(uvlo) Startup threshold Stop threshold V Hysteresis PWM (Ramp) (1) D MIN Minimum duty cycle V SS = GND, V FB =V 0% D MAX Maximum duty cycle QR mode, f S = max, (open loop) 99% Oscillator (OSC) f QR(max) Maximum QR frequency f QR(min) Minimum QR and FFM frequency V FB = 1.3 V khz f SS Soft start frequency V SS =.0 V dt S /dfb VCO gain T S for 1.6 V < V FB < 1.8 V µs/v Feedback (FB) Feedback pullup resistor kω FB, no load QR mode Green mode ON threshold V FB threshold Green mode OFF threshold V FB threshold Green mode hysteresis V FB threshold V FB threshold burst-on V FB during Green mode FB threshold burst-off V FB during Green mode Burst Hysteresis V FB during Green mode Status STATUS R DS(on) V STATUS =1V kω STATUS leakage/off current V FB = 0.44 V, V STATUS =15V µa 3

4 ELECTRICAL CHARACTERISTICS VDD = 15 V, 0.1-µF capacitor from VDD to GND, 3.3-nF capacitor from SS to GND charged over 3.5 V, 500-Ω resistor from OVP to 0.1V, FB = 4.8 V, STATUS = not connected, 1-nF capacitor from OUT to GND, CS = GND, T A =T J = 40 C to 105 C, PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Current Sense (CS) () A CS(FB) Gain, FB = V FB / V CS QR mode.5 V/V Shutdown threshold V FB =.4 V, V SS =0V V CS to output delay time (power limit) CS = 1.0 V PULSE CS to output delay time (over current fault) CS = 1.45 V PULSE ns CS discharge impedance CS = 0.1 V, V SS =0V Ω CS offset SS mode, V SS.0 V, via FB V Power Limit (PL) () CS current OVP = 300 µa µa CS working range QR mode, peak CS voltage PL threshold Peak CS voltage CS offset V Soft Start (SS) I SS(chg) Softstart charge current V SS = GND µa I SS(dis) Softstart discharge current V SS = 0.5 V ma V SS Switching ON threshold Output switching start V Overvoltage Protection (OVP) OVP (line) Line overvoltage protection I OVP threshold, OUT = HI µa OVP voltage at OUT = HIGH V FB = 4.8 V, V SS = 5.0 V, I OVP,= 300µA 15 5 mv OVP (load) Load overvoltage protection V OVP threshold, OUT = LO V Thermal Protection (TSD) Thermal shutdown (TSP) temperature (3) Thermal shutdown hysteresis 15 C OUT t RISE Rise time 10% to 90% of 13 V typical out clamp t FALL Fall time 10 0 ns 4

5 OPEN LOOP TEST CIRCUIT V FB V CS I CS R CST 37.4 kω See Note 5 V C CST 560 pf See Note C FB 47 pf 1 C SS 3.3 nf 3 UCC8600 SS STATUS FB OVP CS VDD R OVP 500 Ω STATUS I OVP V OVP V I DD DD GND 4 GND OUT 5 C DD 100 nf C BIAS 1 µf R OUT 10 Ω C OUT 1.0 nf V OUT NOTE: R CST and C CST are not connected for maximum and minimum duty cycle tests, current sense tests and power limit tests. BLOCK DIAGRAM/TYPICAL APPLICATION C BULK R SU R DD From Auxiliary Winding C DD R OVP1 R OVP UCC8600 VDD 6 OVP 7 REF 5.0 VREF UVLO 6V STATUS 8 OnChip Thermal Shutdown Fault Logic REF_OK UVLO OVR_T STATUS SS_DIS LOAD_OVP LINE_OVP CS 13/8V QR Detect LOAD_OVP OUT LINE_OVP CS SS_OVR BURST BURST RUN QR_DONE VDD SS 1 C SS Feedback FB REF 0K Oscillator RUN SS_OVR QR_DONE OSC_CL CLK GAIN = 1/.5 Green Mode OSC_CL FB FB_CLAMP 1.5R R PL 1.V 400 mv REF D Q SET CLR Q Modulation Comparison 13V 5 OUT CS 3 R PL R CS 4 GND 5

6 ORDERING INFORMATION T A PACKAGES PART NUMBER 40 C to105 C SOIC (D) (1) UCC8600D DEVICE INFORMATION UCC8600 D PACKAGE (TOP VIEW) SS FB CS GND STATUS OVP VDD OUT TERMINAL NAME NO. I/O CS 3 I FB I GND 4 - OUT 5 O OVP 7 I SS 1 I STATUS 8 O VDD 6 I DESCRIPTION Ω µ Ω µ 6

7 NAME TERMINAL NO. CS 3 I I/O DESCRIPTION (1)()(3) R CS = (V PL V CS(os))( I CS() I CS(1)) I CS() I P(1) I CS(1) I P() R PL = (V PL V CS(os))( I P() I P(1)) I CS(1) I P() I CS() I P(1) FB I GND 4 - µ OUT 5 O R OVP1 = 1 N I OVP(lineth)( B V N BULK(ov) P ) OVP 7 I R OVP = R OVP1 ( ) V OVP(load th) N B N S ( V OUT(ov) V F ) V OVP(load th) 7

8 TERMINAL NAME NO. I/O DESCRIPTION (1)()(3) C SS > I SS t SS(min) (due power limit) A CS(FB) ( V PL V CS(os)) SS 1 I or t SS(min) = [ ( )] R OUT(ss) C OUT C t SS(min) = [ OUT V OUT P LIM ] n1 (V OUT V OUT(step)) R OUT(ss) P LIM STATUS 8 O R ST = R ST1 = V BE(off) I STATUS(leakage) [ )] I (( CC) R β ST V sat ) BE(sat) I R ST V DD(uvlo on) V BE(sat) R DS(on) ( CC β sat β R DS(on) V BE(sat) 8

9 TERMINAL NAME NO. I/O DESCRIPTION (1)()(3) [ C DD = or [ C DD = R DD = ( 4 ( ) ] I DD C ISS V OUT(hi) f QR(max) T BURST V DD(burst) ( ) ] I DD C ISS V OUT(hi) f QR(max) π N )( B NP) V DS1(os) f QR(max) t ss V DD(uvlo) ( L LEAKAGE C D C SNUB) I DD C ISS V OUT(hi) f QR(max) VDD 6 I R SU = V BULK(min) I STARTUP 9

10 PFC OUTPUT or BRIDGE RECTIFIER R SNUB V BULK C BULK R CSNUB SU - R DD PRIMARY N P SECONDARY N S C OUT ROUT V OUT - PFC CONTROLLER BIAS (if used) Q ST C DD R OVP1 N B I CC R ST R ST1 1 SS STATUS 8 FEEDBACK C SS UCC8600 FB OVP 7 3 CS VDD 6 R OVP 4 GND 5 OUT M 1 TL431 C BP 100 nf R PL R CS 1. 10

11 0V 0.5V 0.7V 1.4V.0V 5.0V Green Mode = ON, Burst = ON Burst = OFF Green Mode = OFF, V FB Control Range Limit Internal Reference FFM Green Mode QR Mode or DCM Mode Green Mode Hysteresis Burst Hysteresis V FB 3.0V 40 khz f S 130 khz. 11

12 START RUN = Logic Low STATUS = Hi Z N N Continuous Fault Monitor Vcc > 13V? Vcc < 8V? REF < 4V? Y OVP = Logic High? OT = Logic High? Y RUN = Logic High OC = Logic High STATUS = Hi Z Soft Start RUN = Logic Low Monitor V FB V FB < 0.4 V 1.4 V < V FB <.0 V V FB >.0 V Fixed V/s 40kHz STATUS = 0V (In Run-Mode) STATUS = 0V (In Run-Mode) N V FB < 0.5 V Fixed V/s Freq. Foldback (Light Load) Quasi-Resonant Mode or DCM (Normal Load) Y Zero Pulses STATUS = Hi Z (In Green-Mode) STATUS = 0V (In Run-Mode) Fixed V/s 40kHz Burst N Y V FB > 1.4 V Y V FB > 0.7 V N 3. 1

13 fsw SS Mode (Fixed f SW ) QR Mode (Valley Switching, VS) DCM (maximum fs) (VS) FFM, (VS) Green Mode Switching Frequency f MAX = Oscillator Frequency (130 khz) This mode applies bursts of 40kHz softstart pulses to the power MOSFET gate. The average fsw is shown in this operating mode. f SS (40 khz) f QR_MIN Internally Limited to 40 khz f GRMODE_MX (40 khz) t Feedback Voltage V FB Hysteretic Transition into Green Mode Burst Hysteresis t Power Supply Output Voltage V OUT t Status, pulled up to VDD V STATUS Green Mode, PFC bias OFF t Load Power Peak MOSFET Current Load shown is slightly less than overcurrent threshold IC Off Softstart Regular Operation Fixed Frequency Frequency Green Mode P OUT Foldback P OUT, (max) t t 4. 13

14 REF Oscillator OSC Peak Comparator 4.0V SS_OVR QR_DONE OSC_CL 130 khz OSC Clamp Comparator S R Q Q CLK 0.1V RUN OSC Valley Comparator 5. Mode Clamps 1.4 V OSC_CL 450 kω FB 100 kω 100 kω 450 kω.0 V FB_CL 6. 14

15 R SU Auxiliary Winding N P N S R OVP1 N B VDD R OVP UCC OVP QR Detect 0.1 V R CS Slope OUT (From Driver) 0.1 V QR_DONE (Oscillator) 0.1 V I LINE REF (5 V) 3.75 V LOAD_OVP (Fault Logic) R PL Power Limit Offset Burst (from FAULT logic) REF (5 V) I LINE I LINE 1 kω 0.45 V LINE_OVP (Fault Logic) CS 1 0 CS

16 UCC8600 REF Fault Logic UVLO REF_OK SET D Q Thermal Shutdown REF (5 V) OVR_T LINE_OVP (QR Detect) LOAD_OVP (QR Detect) Over-Current 0 kω Shutdown 0.5 V/0.7 V Q CLR S R Q Q RUN SS/DIS BURST FB 1.5 V Burst Power-Up Reset 8 STATUS 7 FB 0.5 V/1.4 V SS_OVR CS 3 CS 8. µ 16

17 µ Primary Secondary C BULK R SU N P NS To Zero Current Detection R CC Q ST N B R ST R ST1 10 V D Z1 UCC8051 VCC 8 M1 Feedback UCC8600 FB STATUS 8 M GND 5 C CC 0.1 µf 4 GND VDD 6 R CS TL

18 µ 18

19 TYPICAL CHARACTERISTICS PL THRESHOLD vs TEMPERATURE SWITCHING FREQUENCY vs TEMPERATURE V DD - Clamp Voltage - V f S - Switching Frequency - khz T J Temperature C T J Temperature C PL THRESHOLD vs TEMPERATURE OVER VOLTAGE PROTECTION THRESHOLD vs TEMPERATURE 37 PL Threshold, QR Mode, Peak CS Voltage - V I OVP - Over Voltage Protection Threshold - µa T J Temperature C 1 T J Temperature C 13 19

20 R PL = R PL1 ( R R DCS) 1 (3) R PL1 = R () PL ( R R DCS) From power MOSFET From power MOSFET R PL R PL1 To CS To CS R DCS R PL R CS (a) (b) 14. 0

21 µ V IN C BULK R SNUB1 C SNUB PRIMARY L M SECONDARY V D V SNUB L LEAK C D Resonance D S L LEAK V BULK V R M 1 C D V D V G 0V V G R CS 0V (a) (b) PRIMARY SECONDARY Reduced L LEAK C D Resonance V IN C BULK R SNUB1 R SNUB L M V D V SNUB C SNUB L LEAK V BULK D S V R M 1 C D 0V V G R CS V D V G 0V (c) (d) 15. 1

22 Pick V SNUB V R = between 0.5 and 1 (4) C SNUB = I cs(peak) LLEAK (V R V SNUB ) V R R SNUB1 = 1 ( ) V R 1 V SNUB C SNUB( 1 L LEAK I CS(peak) f S(max) V SNUB ) (5) (6) P ( R SNUB1) = V R R SNUB1 1 I CS(peak) LLEAK f S(max) (7) R SNUB = V SNUB I CS(peak) (8) P ( R SNUB ) =I CS(peak) RSNUB 1 3 L LEAK f S(max) ( VR ) V SNUB (9) Q= V R V 1 SNUB (10) (SLUS646B_MAY. 006)

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25 IMPORTANT NOTICE