Datasheet > AP3968

AP3968

更新时间： 2022-04-13 03:44:58

品牌	Logo	应用领域
BCDSEMI		/
页数	文件大小	规格书
15页	639K
描述
Primary Side Power Switcher for Off-line SMPS Low Total Cost Solution

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AP3968 数据手册

Preliminary Datasheet

Primary Side Power Switcher for Off-line SMPS

AP3968/69/70/70S

Features

General Description

•

Primary Side Control for Eliminating

Opto-coupler and Secondary CV/CC Control

Circuitry

The AP3968/69/70/70S consists of a primary side

regulation controller and a high voltage transistor,

and is specially designed for off-line power supplies

within 12W output power. Typical applications

include adapter for ADSL and auxiliary supplies.

•

Built-in NPN Transistor with 700V_CBO

Low Start-up Current: 0.2µA (Typ.)

Internal

Output

Cable

Voltage

Drop

Compensation

Random Frequency Modulation for Low EMI

Short Circuit Protection

Low Total Cost Solution

Output Power Range (Note 1):

AP3968 for 5W Adapter

The AP3968/69/70/70S operates at pulse frequency

modulation (PFM), and provides accurate constant

voltage, constant current (CV/CC) regulation without

requiring an opto-coupler and secondary control

circuitry. It has internal cable compensation function

for tight constant voltage regulation.

•

AP3969 for 7.5W Adapter

AP3970 for 12W Adapter

AP3970S for 10W Adapter

The AP3968/69/70/70S solution has fewer

component numbers, smaller size, and lower total

cost.

Note 1: Typical continuous power in a non-ventilated

enclosed adapter measured at 50ºC ambient.

The AP3968 is packaged in SOIC-7. The

AP3969/70/70S is packaged in DIP-7 and DIP-8.

Applications

•

Chargers

Adapters

Set Top Boxes

Auxiliary Supplies

DVD

LED Driver

SOIC-7

DIP-7

DIP-8

Figure 1. Package Types of AP3968/69/70/70S

Dec. 2011 Rev. 1. 4

BCD Semiconductor Manufacturing Limited

12 3 4 5 6 7...15

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