KA7511

www.fairchildsemi.com KA7511 SMPS Controller Features Wide Operating Range Under Voltage Lockout Direct Switching TR Drive Low Start-Up Current Description The KA7511 drives, regulates and monitors the main switching element in a SMPS based on the nonsynchronous flyback theory. Because of the wide regulating range and the high voltage stability during large load changes, the power supplies for TV receivers and video recorders can be realized. 10-SIP H/S 1 Internal Block Diagram Rev. 5.0 ©2000 Fairchild Semiconductor International KA7511 Absolute Maximum Ratings (TA=25°C) Parameter Supply Voltage Reference Output Voltage Zero Passage Identification Voltage Control Amplifier Voltage Collector Current Simulation Voltage Blocking Input Voltage Base Current Cut-Off Point Voltage Base Current Amplifier Output Voltage Collector Current Simulation Current Blocking Input Current Base Current Cut-Off Point Current Base Current Amplifier Output Current Operating Temperature Range Symbol VCC VREF V2 V3 V4 V5 V7 V8 I4 I5 I7 I8 TA Value 20 6 ± 0.6 3 8 8 V9 V9 5 5 1.5 -1.5 0 ~ +70 Unit V V V V V V V V mA mA A A °C Electrical Characteristics (TA = 25°C, unless otherwise specified) Parameter Supply Voltage Start Operation Supply Current (1) (2) (3) Switch On V1 ICC1 ICC2 ICC3 V9 V9 = 2V V9 = 5V V9 = 10V 11.0 1.5 2.4 11.8 0.5 2.0 3.2 12.3 mA mA mA V Symbol VCC Conditions Min. Typ. 15 Max. 18 Unit V 2 KA7511 Electrical Characteristics (TA = +25°C, unless otherwise specified...