General Description

The PWM type DC/DC converter for AC/DC provides an

optimal system for all products that require an electrical

outlet. These ICs support both isolated and non-isolated

devices and enable simpler designs of various types of a

low power consumption electrical converters.

The built-in 650 V startup circuit contributes to low power

consumption.

Power supplies can be designed flexibly by connecting a

current detection resistor for the switching externally.

Current is restricted in each cycle and excellent

performances are demonstrated in a bandwidth and

transient response since a current mode control is

utilized. The switching frequency is 65 kHz by a fixed

method. At light load, the frequency is reduced and high

efficiency is achieved. A built-in frequency hopping

function also contributes to low EMI. A built-in 650 V

switching MOSFET makes designs easy.

Features

PWM Current Mode Method

Frequency Hopping Function

Burst Operation at Light Load

Frequency Reduction Function

Built-in 650 V Startup Circuit

Built-in 650 V Switching MOSFET

VCC UVLO (Under Voltage Lockout)

VCC OVP (Over Voltage Protection)

Soft Start Function

FB OLP (Over Load Protection)

Over Current Detection Function per Cycle

Over Current Detection AC Voltage Compensation

Function

SOURCE Pin Open Protection Function

SOURCE Pin Short Protection Function

SOURCE Pin Leading Edge Blanking Function

Applications

AC Adapters, Household Appliances (Such as Vacuum

Cleaners, Humidifiers, Air Cleaners, Air Conditioners, IH

Cooking Heaters and Rice Cookers)