■ Overview

The AN8026 is an IC developed for controlling the self-excited switching power supply employing the RCC pseudo-resonance type control method.

It is compact, equipped only with the necessary minimum functions.

The maximum on-period and the minimum off-period can be set separately by using the external capacitor and resistor respectively.

It is suitable for the power supply of AV equipment.

■ Features

• Operating supply voltage range:

Stop voltage (8.6 V typical) to 34 V

• Output block employs the totem pole system.

• Power MOSFET can be directly driven.

(output peak current: ±1 A maximum)

• Small pre-start operating current (80 µA typical) allows using a small size start resistor.

• Built-in pulse-by-pulse overcurrent protection function

• Incorporating protection circuit against malfunction at low voltage (start/stop: 14.9 V/8.6 V)

• Built-in overvoltage protection function (externally resettable)

• Equipped with frequency (VF) control function.

• 9-pin single inline package expands the freedom of board design.

■ Applications

• Televisions, facsimiles, printers, scanners, video equipment