MC44604PG

高安全性脉冲模式待机GREENLINE TM PWM控制器 High Safety Pulsed Mode Standby GreenLine TM PWM Controller

High Safety Pulsed Mode Standby GreenLine PWM Controller

The MC44604 is an enhanced high performance controller that is specifically designed for off−line and dc−to−dc converter applications. Its high current totem pole output is ideally suited for driving a power MOSFET.

Current Mode Controller

• Operation Up to 250 kHz Output Switching Frequency

• Inherent Feed Forward Compensation

• Latching PWM for Cycle−by−Cycle Current Limiting

• Oscillator with Precise Frequency Control

High Flexibility

• Externally Programmable Reference Current

• Secondary or Primary Sensing

• High Current Totem Pole Output

• Undervoltage Lockout with Hysteresis

Safety/Protection Features

• Overvoltage Protection Facility Against Open Loop

• Protection Against Short Circuit on Oscillator Pin

• Fully Programmable Foldback

• Soft−Start Feature

• Accurate Maximum Duty Cycle Setting

• Demagnetization Zero Current Detection Protection

• Internally Trimmed Reference

GreenLine Controller

• Low Startup and Operating Current

• Pulsed Mode Standby for Low Standby Losses

• Low dV/dT for Low EMI

Features

.