CM6802SAHGIP

CM6802SAH/SBH http://www.championmicro.com.tw (Turbo-Speed PFC+Green PWM) EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load GENERAL DESCRIPTION CM6802SAH/SBH is a turbo-speed PFC and a Green PWM controller. It is designed to further increase power supply efficiency while using the relatively lower 380V Bulk Capacitor value. Switching to CM6802SAH/SBH from your existing CM6800 family boards can gain the following advanced performances: Around 2% efficiency gain when the output load is below 40% of the full load 2.) Hold Up time can be increased ~ 30% from the existing 6800 power supply 3.) Turbo Speed PFC may reduce 420 Bulk Capacitor size 4.) 420V bulk capacitor value may be reduced and PFC Boost Capacitor ripple current can be reduced 5.) No Load Consumption can be reduced 290mW at 270VAC 6.) Better Power Factor and Better THD 7.) Clean Digital PFC Brown Out 8.) PWM transformer size can be smaller 9.) Superior Surge Noise Immunity 10.) To design 12V, 5V, and 3.3V output filters can be easy 11.) The stress over the entire external power device is reduced and EMI noise maybe reduced; PFC inductor core might be reduced 12.) Monotonic Output design is easy 13.) And more… Of course, the cost can be reduced CM6802SAH/SBH is pin to pin compatible with CM6800 family. Beside all the goodies in the CM6800, it is designed to meet the EPA/85+ regulation. With the proper design, its efficiency of power supply can easily approach 85%. To start evaluating CM6802SAH/SBH from the exiting CM6800, CM6800A, or ML4800 board, 6 things need to be taken care before doing the fine tune: 1.) Change RAC resistor (on pin 2, IAC) from the old value to a higher resistor value between 4.7 Mega ohm to 8 Mega ohm. Start with 6 Mega ohm for RAC first. 2.) Change RTCT pin (pin 7) from the existing value to RT=5.88K ohm and CT=1000pF to have fpfc=68Khz, fpwm=68Khz, frtct=272Khz for CM6802SAH and fpfc=68Khz, fpwm=136Khz, frtct=272Khz for CM6802SBH 3.) Adjust all high voltage resistor around 5 mega ohm or higher. 4.) VRMS pin(pin 4) needs to be 1.14V at VIN=80VAC for universal input application from line input from 80VAC to 270VAC. Both poles for the Vrms of the CM6802SAH/SBH needs to substantially slow than CM6800 about 5 to 10 times. 5.) At full load, the average Veao needs to around 4.5V and the ripple on the Veao needs to be less than 250mV when the load triggers the light load comparator. 6.) Soft Start pin (pin 5), the soft start current has been reduced from CM6800’s 20uA to CM6802SAH/SBH’s 10uA.Soft Start capacitor can be reduced to 1/2 from your original CM6800 capacitor. 1.) FEATURES Patents Pending Pin to pin compatible ML4800, and FAN4800 23V Bi-CMOS process Designed for EPA/85+ efficiency Selectable Boost output from 380V to 342V during light load Digitized Exactly 50% Maximum PWM Duty Cycle All high voltage resistors can be greater than 4.7 Mega ohm (4.7 Mega to 8 Mega ohm) to improve the no load consumption Rail to rail CMOS Drivers with on, 60 ohm and off, 30 ohm for both PFC and PWM with two 17V zeners Fast Start-UP Circuit without extra bleed resistor to aid VCC reaches 13V sooner Low start-up current (55uA typ.) Low operating current (2.5mA typ.) 16.5V VCC shunt regulator Leading Edge Blanking for both PFC and PWM fRTCT = 4*fpfc =4*fpwm for CM6802SAH fRTCT = 4*fpfc =2*fpwm for CM6802SBH Dynamic Soft PFC to ease the stress of the Power Device and Ease the EMI filter design Clean Digital PFC Brown Out and PWM Brown Out Turbo Speed PFC may reduce 420 Bulk Capacitor size Internally synchronized leading edge PFC and trailing edge PWM in one IC to Reduces ripple current in the 420V storage capacitor between the PFC and PWM sections Better Power Factor and Better THD Average current, continuous or discontinuous boost leading edge PFC PWM configurable for current mode or feed-forward voltage mode operation Current fed Gain Modulator for improved noise immunity Gain Modulator is a constant maximum power limiter Precision Current Limit, over-voltage protection, UVLO, soft start, and Reference OK with CM6800, CM6800A, 2009/11/02 Rev. 1.5 Champion Microelectronic Corporation 1 CM6802SAH/SBH http://www.championmicro.com.tw (Turbo-Speed PFC+Green PWM) EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load APPLICATIONS EPA/85+ related Power Supply Desktop PC Power Supply Internet Server Power Supply LCD Power Supply PDP Power Supply IPC Power Supply UPS Battery Charger DC Motor Power Supply Monitor Power Supply Telecom System Power Supply Distributed Power PIN CONFIGURATION SOP-16 (S16) / PDIP-16 (P16) 1 2 3 4 5 6 7 8 IEAO IAC ISENSE VRMS SS VDC RAMP1 RAMP2 VEAO VFB VREF VCC PFC OUT PWM OUT GND DC ILIMIT 16 15 14 13 12 11 10 9 PIN DESCRIPTION Pin No. Symbol Description PFC transconductance current error amplifier output (Gmi). IAC has 2 functions: Operating Voltage Min. 0 Typ. Max. VREF Unit V 1 IEAO 2 IAC 1. PFC gain modulator reference input. 2. Typical RAC resistor is about 6 Mega ohm to sense the line. PFC Current Sense: for both Gain Modulator and PFC ILIMIT comparator. Line Input Sense pin and also, it is the brown out sense pin. Soft start capacitor pin; can use it to on/off the boost 0 100 uA 3 4 ISENSE VRMS -1.2 0 0.7 VCC+0.3 V V 5 SS follower function; it is pulled down by 70K ohm internal resistor when DCILIMIT reach 1V; the power is limited during the PWM Brown out. 0 10 V 2009/11/02 Rev. 1.5 Champion Microelectronic Corporation 2 CM6802SAH/SBH http://www.championmicro.com.tw (Turbo-Speed PFC+Green PWM) EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load 6 VDC RAMP1 DC to DC PWM voltage feedback input. 0 10 V 7 (RTCT) RAMP 2 8 (PWM RAMP) 9 10 11 12 13 14 15 16 DC ILIMIT GND PWM OUT PFC OUT VCC VREF VFB VEAO Oscillator timing node; timing set by RT and CT 0.8 4 V In current mode, this pin functions as the current sense input; when in voltage mode, it is the feed-forward sense input from PFC output 380V (feed forward ramp). 0 VDCmax1.8 V PWM current limit comparator input Ground PWM driver output PFC driver output Positive supply for CM6802SAH/SBH Maximum 3.5mA buffered output for the internal 7.5V reference when VCC=14V PFC transconductance voltage error amplifier input PFC transconductance voltage error amplifier output (GmV) 0 1 V 0 0 10 15 7.5 0 0 2.5 VCC VCC 20 V V V V 3 6 V V ORDERING INFORMATION Part Number CM6802SAH/SBHGIP* CM6802SAH/SBHGIS* CM6802SAH/SBHGISTR* CM6802SAH/SBHXIP* CM6802SAH/SBHXIS* CM6802SAH/SBHXISTR* Temperature Range -40℃ to 125℃ -40℃ to 125℃ -40℃ to 125℃ -40℃ to 125℃ -40℃ to 125℃ -40℃ to 125℃ Package 16-Pin PDIP (P16) 16-Pin Narrow SOP (S16) 16-Pin Narrow SOP (S16) 16-Pin PDIP (P16) 16-Pin Narrow SOP (S16) 16-Pin Narrow SOP (S16) *Note: G : Suffix for Pb Free Product X : Suffix for Halogen Free Product TR : Package is Typing Reel 2009/11/02 Rev. 1.5 Champion Microelectronic Corporation 3 CM6802SAH/SBH http://www.championmicro.com.tw (Turbo-Speed PFC+Green PWM) EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load Simplified Block Diagram (CM6802SAH/SBH) 16 + VEAO 1 IEAO VFB + 13 PFC OVP . VCC GMv . 2.5V VFB 15 IAC 2 4 3 7 VRMS ISENSE Rmul + - 2.85V GMi . - 16.5V Zener - PFC CMP + - PFC Tri-Fault 0.5V VFB -1.0V ISENSE 0.3V VEAO + S Q 7.5V REFERENCE VREF 14 GAIN MODULATOR Rmul PFC RAMP VCC PFC ILIMIT + - R Q MPPFC PFC OUT 12 MNPFC 17V ZENER S Q Green PFC + R Q PFC RAMP1 PFCCLK . 2K 8 RAMP2 SW SPST PWMCLK . Green PWM PPWM + S S R Q Q VCC VREF+2.5V 10uA REF-OK 380-OK 5 SS 70K 10 GND ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are those values beyond which the device could be permanently damaged. Parameter Min. Max. VCC 20 IEAO 0 VREF+0.3 ISENSE Voltage -5 0.7 PFC OUT GND – 0.3 VCC + 0.3 GND – 0.3 VCC + 0.3 PWMOUT GND – 0.3 VCC + 0.3 Voltage on Any Other Pin 3.5 IREF 1 IAC Input Current Peak PFC OUT Current, Source or Sink 0.5 Peak PWM OUT Current, Source or Sink 0.5 PFC OUT, PWM OUT Energy Per Cycle 1.5 Junction Temperature Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 10 sec) Thermal Resistance (θJA) Plastic DIP Plastic SOIC Power Dissipation (PD) TA 2.25V and Vrms VREF and Veao < 1.75V and Vrms