MC44604 Datasheet PDF - ON Semiconductor

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

●• Pb−Free Package is Available