AP1680 datasheet(1/9 Pages) BCDSEMI

Part #	AP1680

Description	LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

PDF	9 Pages

Scroll/Zoom	100%

Manufacturer	BCDSEMI [BCD Semiconductor Manufacturing Limited]

Direct Link	http://www.bcdsemi.com

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LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

AP1680

Preliminary Datasheet

1

BCD Semiconductor Manufacturing Limited

Apr. 2011 Rev. 1. 0

General Description

The AP1680 is a high performance AC/DC power sup-

ply controller for LED drivers, battery charger and

adapter applications. The device uses Pulse Frequency

Modulation (PFM) method to build discontinuous con-

duction mode (DCM) flyback power supplies.

The AP1680 provides accurate constant voltage, con-

stant current (CV/CC) regulation while removing the

opto-coupler and secondary control circuitry. It also

eliminates the need of loop compensation circuitry

while maintaining stability. The AP1680 achieves

excellent regulation and high average efficiency, yet

meets the requirement for no-load consumption less

than 30mW.

The AP1680 is available in SOT-23-6 package.

Features

·

Primary Side Control for Rectangular Constant

Current and Constant Voltage Output

·

Sub-microampere Start-up Current

·

30mW No-load Input Power Feasible

·

Tight CC Regulation Performance

·

Eliminates Opto-coupler and Secondary CV/CC

Control Circuitry

·

Eliminates Control Loop Compensation Circuitry

·

Flyback Topology in DCM Operation

·

Random Frequency Modulation to Reduce

System EMI

·

Built-in Soft Start

·

Open Feedback Protection

·

Short Circuit Protection

·

SOT-23-6 Package

Applications

·

LED Drivers

·

Adapters/Chargers for Cell/Cordless Phones,

PDAs, MP3 and Other Portable Apparatus

·

Standby and Auxiliary Power Supplies

Figure 1. Package Type of AP1680

SOT-23-6

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AP1680 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited

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