FEATURES

Primary side Sensing and Regulation Without

A431 and Opto-Coupler

High Precision Constant Voltage and Current

Regulation at Universal AC Input

Multi-mode PWM/PFM Operation for Efficiency Improving

Integrated 2A 1000V MOSFET

Good Dynamic Response with Synchronous

Rectifier Application

Programmable CV and CC regulation

Built-in primary winding inductance

Compensation

Programmable Cable Drop Compensation

No need for Control Loop Compensation

Audio Noise free Operation

Built-in leading-edge blanking (LEB)

Ultra-low start-up current and low Operating Current

Comprehensive Protection Coverage with Auto-Recovery

On-Chip OTP

VDD Over Voltage Protection

VDD under Voltage Lockout with Hysteresis (UVLO)

Cycle-by-Cycle Current Limiting

Feedback Loop Open Protection

Output Short Circuit Protection

DESCRIPTION

AP8022A is a high performance offline PSR power

switch for low power AC/DC charger and adapter

applications. It operates in primary-side sensing

and regulation. Consequently, opto-coupler and

A431 could be eliminated. Proprietary Constant

Voltage (CV) and Constant Current (CC) control is

integrated as shown in the figure below.

Typical

lCC/CV Curve

In CC control, the current and output power setting

can be adjusted externally by the sense resistor Rs

at CS pin. In CV control, multi-mode operations are

utilized to achieve high performance and high

efficiency.

In addition, good load regulation is achieved by the

built-in cable drop compensation. Device operates

in PFM in CC mode at large load condition and it

operates in PWM with frequency reduction at

light/medium load.

The AP8022A consumes very low operation

current. It achieves less than 75mW standby power

to meet strict s standby power standard.

AP8022A offers comprehensive protection

coverage with auto-recovery feature including

Cycle-by-Cycle current limiting, VDD over voltage

protection, feedback loop open protection, built-in

leading-edge blanking, VDD under voltage lockout

(UVLO), OTP etc.

The AP8022A is available in DIP7 packages.

APPLICATION

Low Power AC/DC offline SMPS for

Industrial instruments: single / three-phase meters

Outdoor monitoring / protection equipment

AC / DC with high input voltage