Overview

The AN8038 and AN8038S are self-excited AC-DC switching power supply control IC that adopt RCC local resonance control. These ICs are designed to achieve high efficiency over a wide range of loads (light loads at the standby mode to heavy loads) for improved conformance with energy conservation laws, and support input levels used worldwide. They are particularly appropriate for use in AV and OA equipments.

Features

• Supports improved conformance with energy conservation laws by providing two operating modes. With external resistors, it is possible to set the operating point at which the modes change over according to the load power, as shown below.

1.Continuous (RCC) mode

High efficiency achieved with local resonance operation (zero cross detection).

2.Discontinuous mode (standby) mode

Reduced switching loss and standby power due to reduced frequency

• Input voltage correction function. This function corrects the maximum on-period in a manner inversely proportional to the input voltage.

• Built-in overvoltage protection function (detects at VCC pin)

• Pulse-by-pulse overcurrent protection function (single detection per one cycle)

• Packages: 8-pin DIP ··· AN8038 8-pin SOP ··· AN8038S

Applications

• Facsimiles and other OA equipment

• Printers and other personal computer peripheral equipment

• AV equipment