Datasheet > AP3703

AP3703

更新时间： 2024-11-19 06:37:19

品牌	Logo	应用领域
BCDSEMI		控制器
页数	文件大小	规格书
11页	481K
描述
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

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中文翻译

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AP3703 数据手册

Preliminary Datasheet

LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3703

General Description

Features

The AP3703 is a high performance AC/DC power sup-

ply controller for battery charger and adapter applica-

tions. The device uses Pulse Frequency Modulation

(PFM) method to build discontinuous conduction

mode (DCM) flyback power supplies.

Primary Side Control for Rectangular Constant

Current and Constant Voltage Output

Secondary CV/CC Control Circuitry Eliminating

Opto-Coupler

No Need for Control Loop Compensation

Circuitry

The AP3703 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 AP3703 achieves

excellent regulation and high average efficiency, yet

meets the requirement for no-load consumption less

than 100mW.

Flyback Topology in DCM Operation

Random Frequency Modulation to Reduce

System EMI

Built-in Soft Start

Open Feedback Protection

Over Voltage Protection

Short Circuit Protection

Small SOT-23-5 package to achieve compact size

and less component

The AP3703 is available in SOT-23-5 package.

Applications

Adapters/Chargers for Cell/Cordless Phones,

PDAs, MP3 and Other Portable Apparatus

Standby and Auxiliary Power Supplies

LED Driver

SOT-23-5

Figure 1. Package Type of AP3703

Feb. 2009 Rev. 1.0

BCD Semiconductor Manufacturing Limited

12 3 4 5 6 7...11

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