飞兆半导体最新推出SG6742M PWM Controller

http://www.fairchildsemi.com/pf/SG/SG6742MR_ML.html
请参考以上链接的产品资料.
主要特点:
High-Voltage Startup
Low Operating Current: 2.7mA
Linearly Decreasing PWM Frequency to 22KHz
Frequency Hopping to Reduce EMI Emission
Fixed PWM Frequency: 65KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking
Synchronized Slope Compensation
Internal Open-Loop Protection
GATE Output Maximum Voltage Clamp: 18V
VDD Under-Voltage Lockout (UVLO)
VDD Over-Voltage Protection (OVP)
Programmable Over-Temperature Protection (OTP)
Internal Latch Circuit (OVP, OTP)
Internal Sense Short-Circuit Protection
Build-in 5ms Soft-Start Function
Constant Power Limit (Full AC Input Range)
Internal OTP Sensor with Hysteresis