CM6802AH

CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load GENERAL DESCRIPTION Switching to CM6802A/B/AH/BH from your existing CM6800 family boards can gain the following advanced performances: 1.) 2.) 3.) Around 2% efficiency gain when the output load is below 40% of the full load. Hold Up time can be increased ~ 30% from the existing 6800 power supply. 420V bulk capacitor value may be reduced PFC boost ripple current can be reduced; therefore, the boost inductor core size maybe reduced. No Load Consumption can be reduced 290mW at 270VAC. PWM transformer size can be smaller. To design 12V, 5V and 3.3V output filters can be easy. The stress over the entire external power device is reduced and EMI noise maybe reduced. Monotonic Output design is easy and more…Of cause, the cost will be reduced. FEATURES Patents Pending Pin to pin compatible ML4800 and FAN4800. 23V Bi-CMOS process. Designed for EPA/80++ efficiency. CM6802A/B : Selectable Boost output from 380V to 300V during light load. CM6802AH/BH: Selectable Boost output from 380V to 342V during light load. 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 CM6802A//AH fRTCT = 4*fpfc =2*fpwm for CM6802B/BH Dynamic Soft PFC to ease the stress of the Power Device and Ease the EMI filter design. PFC Brown Out and PWM Brown Out 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. Low total harmonic distortion, THD and Power Factor approaches 1.0. 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. Brown-out control, over-voltage protection, UVLO, and soft start, and Reference OK. PWM Short Circuit Protection Power Fold Back Protection Green Mode PWM for less no load consumption. with CM6800,CM6800A, 4.) 5.) 6.) 7.) 8.) CM6802A/B/AH/BH is pin to pin compatible with CM6800 family. Beside all the goodies in the CM6800, it is designed to meet the EPA/80+ regulation. With the proper design, its efficiency of power supply can easily approach 85%. To start evaluating CM6802A/B/AH/BH 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 ohms to 8 Mega ohms. 2.) Change RTCT pin (pin 7) from the existing value to RT=7.75K ohm and CT=1000pF to have fpfc=55Khz, fpwm=55Khz, frtct=220Khz. 3.) Adjust all high voltage resistor around 5 mega ohm or higher. 4.) VRMS pin (pin 4) needs to be 1.125V at VIN=85VAC for universal input application from line input from 85VAC to 270VAC. Both poles for the Vrms of the CM6802A/B/AH/BH 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. 6.) Soft Start pin (pin 5), the soft start current has been reduced from CM6800’s 20uA to CM6802A/B/AH/BH’s 10uA.Soft Start capacitor can be reduced to 1/2 from your original CM6800 capacitor. 2009/11/02 Rev. 1.4 Champion Microelectronic Corporation 1 CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load APPLICATIONS EPA/80++ 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: 1. PFC gain modulator reference input. 2. At start up, IAC is connected to VCC and it helps to reduce the startup time and it helps to reduce the no load consumption. 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 Operating Voltage Min. 0 Typ. Max. VREF Unit V 1 IEAO 2 IAC 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 300 ohm internal resistor when DCILIMIT reach 1V; the power is limited during the PWM Brown out. 0 10 V 2009/11/02 Rev. 1.4 Champion Microelectronic Corporation 2 CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load 6 VDC RAMP 1 DC to DC PWM voltage feedback input. 0 10 V 7 (RTCT) Oscillator timing node; timing set by RT and CT 0.8 4 V 8 In current mode, this pin functions as the current sense input; when in voltage mode, it is the feed-forward sense (PWM RAMP) input from PFC output 380V (feed forward ramp). RAMP 2 0 VDCmax-1.8 V 9 10 11 12 13 14 15 DC ILIMIT GND PWM OUT PFC OUT VCC VREF VFB PWM current limit comparator input 0 1 V Ground PWM driver output 0 0 10 15 7.5 0 2.5 VCC VCC 18 V PFC driver output V V V Positive supply for CM6802A/B/AH/BH Maximum 4mA buffered output for the internal 7.5V reference when VCC=14V PFC transconductance voltage error amplifier input 3 V 16 VEAO PFC transconductance voltage error amplifier output (GmV) 0 6 V ORDERING INFORMATION Part Number CM6802A/B/AH/BHGIP* CM6802A/B/AH/BHGIS* CM6802A/B/AH/BHGISTR* CM6802A/B/AH/BHXIP* CM6802A/B/AH/BHXIS* CM6802A/B/AH/BHXISTR* 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 TR : Package is Typing Reel X : Suffix for Halogen Free Product 2009/11/02 Rev. 1.4 Champion Microelectronic Corporation 3 CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load Simplified Block Diagram (CM6802A/B/AH/BH) 16 + VEAO 1 IEAO VFB + 13 PFC OVP . 2 VCC GMv . 2.5V VFB 15 VCC IAC 2 4 3 VRMS ISENSE - + PFC CMP + - . - PFC Tri-Fault 0.5V VFB -1.0V ISENSE 0.3V VEAO + S Q GAIN MODULATOR Rmul PFC RAMP 1 Rmul 2.85V GMi - 16.5V Zener 7.5V REFERENCE VREF 14 VCC PFC ILIMIT + - R Q MPPFC PFC OUT 12 MNPFC 17V ZENER S Q Green PFC + R Q PFC PFCCLK . 7 RAMP1 . 300 8 RAMP2 SW SPST PWMCLK Green PWM VCC REF-OK 380-OK 5 10 GND ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are those values beyond which the device could be permanently damaged. Parameter Min. Max. VCC 18 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 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) TAVREF and Veao < Reference VNONINV = VINV, VEAO = 2.25V @ T=25℃ Voltage SS < VREF and Veao > 2.5V 0 53 2.4 1.9 2.17 -1.0 5.8 69 2.51 2 2.26 -0.05 6.0 0.1 -18 15 40 75 0.4 -12 25 3 88 2.62 2.1 2.35 V Sweep Vrms Pin Sweep Vrms Pin Room Temperature=25℃ Room Temperature=25℃ 1.19 0.97 170 2.15 1.85 200 1.25 1.05 216 2.25 2 1.32 1.13 260 2.35 2.12 300 V V mV V V mV μ mho V V V CM6802AH/BH 1.75V and Vrms < 2V Note 2 μA V V μA μA dB dB μ mho mV V V 2009/11/02 Rev. 1.4 Champion Microelectronic Corporation 5 CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load ELECTRICAL CHARACTERISTICS: (Conti.) Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75 kΩ, CT = 1000pF, TA=OperatingTemperature Range (Note 1) CM6802A/B/AH/BH Min. Sink Current Source Current Open Loop Gain Power Supply Rejection Ratio PFC OVP Comparator Threshold Voltage Hysteresis PFC Green Power Detect Comparator Veao Threshold Voltage Tri-Fault Detect Fault Detect HIGH Time to Fault Detect HIGH VFB=VFAULT DETECT LOW to VFB=OPEN, 470pF from VFB to GND Fault Detect LOW PFC ILIMIT Comparator Threshold Voltage (PFCILIMIT– Gain Modulator Output) Delay to Output (Note 4) DC ILIMIT Comparator Threshold Voltage Delay to Output (Note 4) DC to DC PWM Brown Out Comparator OK Threshold Voltage Hysteresis 2.20 900 2.36 950 2.52 1000 V mV Overdrive Voltage = 100mV 0.92 1.0 700 1.08 V ns Overdrive Voltage = -100mV -1.10 100 -1.00 200 700 -0.90 V mV ns 0.4 2.70 2.85 2 0.5 3.0 4 0.6 V ms V 0.15 0.25 0.35 V 2.70 200 2.85 3.0 300 V mV ISENSE = -0.5V, IEAO = 1.5V ISENSE = +0.5V, IEAO = 4.0V DC Gain 11V < VCC < 16.5V -42 28 30 60 Typ. -33 31 40 75 Max. -30 42 Symbol Parameter Test Conditions Unit μA μA dB dB 2009/11/02 Rev. 1.4 Champion Microelectronic Corporation 6 CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load ELECTRICAL CHARACTERISTICS: (Conti.) Unless otherwise stated, these specifications apply Vcc=+14V, RT = 7.75 kΩ, CT = 1000pF, TA=OperatingTemperature Range (Note 1) CM6802A/B/AH/BH Min. Typ. Max. Symbol GAIN Modulator Parameter Test Conditions Unit Gain1 (Note 3) Gain2 (Note )3 Gain3 (Note 3) Gain4 (Note 3) Bandwidth (Note 4) Output Voltage = Rmul * (ISENSE-IOFFSET) Oscillator (Measuring fpfc) Initial fpfc Accuracy 1 Voltage Stability Temperature Stability Total Variation Ramp Valley to Peak Voltage PFC Dead Time (Note 4) CT Discharge Current Light Load Veao Threshold Light Load Threshold (High) Light Load Threshold (Low) Hysteresis IAC = 20 μ A, VRMS =1.125, VFB = 2.375V @ T=25℃ SS