SG6903SZ Fairchild Semiconductor, SG6903SZ Datasheet
SG6903SZ
Specifications of SG6903SZ
Related parts for SG6903SZ
SG6903SZ Summary of contents
Page 1
Green Mode PFC/Flyback-PWM Controller FEATURES OVERVIEW Interleaved PFC/PWM switching Green-mode PFC and PWM operation No switching of PFC at light loads for best power saving Low start-up and operating current Innovative switching-charge multiplier-divider Multi-vector control for improved PFC output transient ...
Page 2
... Green Mode PFC/Flyback-PWM Controller MARKING DIAGRAMS SOP =Lead Free SG6903 TP Null=regular package XXXXXXXX: Wafer Lot XXXXXXXXYWWV Y: Year; WW: Week V: Assembly Location ORDERING INFORMATION Part Number Pb-Free Package SG6903SZ 16-pin SOP © System General Corp. Version 1.0.1 (IAO33.0061.B0) Product Specification PIN CONFIGURATION VRMS IEA 3 14 ...
Page 3
Green Mode PFC/Flyback-PWM Controller PIN DESCRIPTIONS Name Pin No. Type Line-Voltage VRMS 1 Detection RI 2 Oscillator Setting Output for PFC IEA 3 Current Amplifier Inverting Input for IPFC 4 PFC Current Amplifier Non-inverting Input for IMP 5 PFC Current ...
Page 4
Green Mode PFC/Flyback-PWM Controller BLOCK DIAGRAM © System General Corp. Version 1.0.1 (IAO33.0061.B0) Product Specification - 4 - www.sg.com.tw • www.fairchildsemi.com SG6903 September 28, 2007 ...
Page 5
Green Mode PFC/Flyback-PWM Controller ABSOLUTE MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage* VDD I Input AC Current AC V OPWM, OPFC, IAC High V Others Low P Power Dissipation At T < 50° Operating Junction Temperature ...
Page 6
Green Mode PFC/Flyback-PWM Controller Oscillator & Green-Mode Operation Symbol Parameter F PWM Frequency OSC F Minimum Frequency in Burst Mode OSC-MINFREQ RI RI Pin Resistance Range RI Pin Open Protection RI OPEN If RI> SG6903 will turn off ...
Page 7
Green Mode PFC/Flyback-PWM Controller Current Error Amplifier Symbol Parameter V Input Offset Voltage ((-) > (+)) OFFSET A Open-loop Gain I BW Unit Gain Bandwidth CMRR Common-mode Rejection Ratio V Output High Voltage OUT-HIGH V Output Low Voltage OUT-LOW I ...
Page 8
Green Mode PFC/Flyback-PWM Controller PWM Stage FBPWM Symbol Parameter Current Comparator Attenuation v-PWM Z Input Impedance FB I Maximum Source Current FB FB PWM Open Loop Protection voltage OPEN-LOOP t PWM Open Loop Protection Delay Time OPEN-PWM ...
Page 9
Green Mode PFC/Flyback-PWM Controller TYPICAL CHARACTERISTICS S tart-Up C urrent ( Temperature -40 -25 - Temperature ( ) Operating C urrent ( ...
Page 10
Green Mode PFC/Flyback-PWM Controller P WM Frequency ( Temperature -40 -25 - Temperature ( ) ℃ Minimum Frequency ( ...
Page 11
Green Mode PFC/Flyback-PWM Controller Ris ing Time ( Temperature 120 104 -40 -25 - Temperature ( ) ℃ F alling Time ( Temperature F ...
Page 12
Green Mode PFC/Flyback-PWM Controller Peak C urrent Limit Threshold Voltage 2 (V Temperature 0.70 0.68 0.66 0.64 0.62 0.60 -40 -25 - Temperature ( ) Ris ing Time ( Temperature 120 ...
Page 13
Green Mode PFC/Flyback-PWM Controller OPERATION DESCRIPTION SG6903 is a highly integrated PFC/PWM combo controller. Lots functions and protections are built in to provide a possible compact design. The following description will describe the operation and function in detail to give ...
Page 14
Green Mode PFC/Flyback-PWM Controller PFC Output Voltage Control (RANGE) For a universal input (90 ~ 264Vac) power supply applying active boost PFC and Flyback as a second stage, the output voltage of PFC is usually designed around 250V at low ...
Page 15
Green Mode PFC/Flyback-PWM Controller According to Equation (5), the minimum value of R2 and maximum of Rs can be determined since I should not exceed the specified maximum value. There are different concerns in determining the value of the sense ...
Page 16
Green Mode PFC/Flyback-PWM Controller Multi-vector Error Amplifier Although the PFC stage has a low bandwidth voltage loop for better input power factor, the innovative Multi-Vector Error Amplifier provides a fast transient response to clamp the overshoot and undershoot of the ...
Page 17
Green Mode PFC/Flyback-PWM Controller Limited Power Control Every time when the output of power supply is shorted or over loaded, the FBPWM voltage will increase. If the FBPWM voltage is higher than a designed threshold, FB (4.5V), for longer than ...
Page 18
Green Mode PFC/Flyback-PWM Controller PACKAGE INFORMATION 16 PINS – PLASTIC SOP ( DIMENSION: Millimeter Symbol Min. A 1.346 A1 0.101 A2 1.244 9.804 E 3.810 e H 5.791 L 0.406 F y ...
Page 19
Green Mode PFC/Flyback-PWM Controller © System General Corp. Version 1.0.1 (IAO33.0061.B0) Product Specification - 19 - www.sg.com.tw • www.fairchildsemi.com SG6903 September 28, 2007 ...