General Description

This series of PWM-type DC/DC converters for AC/DC

supplies the optimum system for all products in which

an outlet is present. It is compatible with both insulated

and non-insulated, and various types of low power

consumption converters can be easily designed.

The built-in 730 V startup circuit contributes to low

power consumption. A highly flexible power supply

design is achieved by externally installing a current

detection resistor for switching. Because of the use of

current mode control, the current is limited every cycle,

providing excellent performance in bandwidth and

excessive response. The switching frequency is fixed at

65 kHz. When turned light load, the frequency is

reduced to achieve high efficiency. Built-in frequency

hopping function contributes to low EMI. Built-in 730 V

switching MOSFET enables easy designing.

Features

◼ PWM Current Mode Control

◼ Frequency Hopping Function

◼ Burst Operation at Light Load

◼ Frequency Reduction Function

◼ Built-in 730 V Startup Circuit

◼ Built-in 730 V Switching MOSFET

◼ VCC UVLO (Under Voltage Lockout)

◼ VCC OVP (Over Voltage Protection)

◼ SOURCE Pin Open Protection

◼ SOURCE Pin Function of Leading Edge Blanking

◼ Over Current Detection Function per Cycle

◼ Over Current Detection AC Compensation Function

◼ Soft Start Function

◼ Secondary Over Current Protection Circuit

Applications

Major Appliance, Office Automation Equipment, AV

Equipment, other SMPS etc.