LT1509
Power Factor and
PWM Controller U DESCRIPTION FEATURES The LT В® 1509 is a complete solution for universal off-line
switching power supplies utilizing active power factor
correction. The PFC section is identical to the LT1248 PFC
controller except the EN/SYNC pin is removed because
PFC and PWM are synchronized internally. PFC and PWM Single Chip Solution
Synchronized Operation up to 300kHz
99% Power Factor over 20:1 Load Current Range
Current Mode PWM
Instantaneous Overvoltage Protection
Dedicated Overvoltage Protection (OVP Pin)
Minimal Line Current Dead Zone
Typical 250ВµA Start-Up Supply Current
Line Switching Noise Filter
Low Quiescent Current: 13mA
Fast 2A Peak Current Gate Drivers
Separate Soft Start Controls в–
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