Datasheet > AP3785T

AP3785T

更新时间： 2024-11-24 14:55:39

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
18页	654K
描述
Primary Side Regulated Switching Mode Power Supply Controller with external OTP

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中文翻译

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AP3785T 数据手册

AP3785T

PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER

Description

Pin Assignments

The AP3785T is a high performance AC/DC power supply controller

for battery charger and adapter applications. It can meet less than

10mW standby power for “Super Star” charger criteria. The device

uses Pulse Frequency Modulation (PFM) method to build

discontinuous conduction mode (DCM) flyback power supplies.

(Top View)

The AP3785T provides accurate constant voltage (CV), constant

current (CC) and outstanding dynamic performance without requiring

an opto-coupler. It also eliminates the need of loop compensation

circuitry while maintaining stability.

CBC

OTP

GND

VCC

OUT

The AP3785T is equipped with both cable drop compensation

function to meet various cables with different lengths and gauges and

adjustable line voltage compensation function.

SO-8

When AP3785T is used with AP4341 or synchronous rectifier series

(for example APR343 + MOSFET, APR3415, APR34330), better

under-shoot performance and higher conversion efficiency can be

achieved.

Features



Primary Side Control for Eliminating Opto-coupler

10mW No-load Input Power

Flyback Topology in DCM Operation

External Adjustable Line Compensation for CC

External Adjustable Cable Compensation for CV

Multiple PWM/PFM Control Mode to Improve Audio Noise and

Efficiency

The AP3785T has internal over temperature protection for itself, and

also provides dedicated pin for external over temperature protection.

This IC is available in SO-8 package.



V_CSJitter to Reduce System EMI

Valley-on for the Higher Efficiency and Better EMI

Multiple Protections:

Applications



Over Voltage Protection (OVP)



Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3

and Other Portable Apparatus



Output Short Circuit Protection (SCP)

Transformer Saturation Protection (TSP) via Primary Peak

Current Limitation

Standby and Auxiliary Power Supplies



OTP and External Over Temperature Protection (OTP)



Matching AP4341 with Schottky or APR343/APR3415

Synchronous Rectifier Solution



SO-8 Package

Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

1 of 18

www.diodes.com

September 2015

AP3785T

Document number: DS37552 Rev. 4 - 2

12 3 4 5 6 7...18

中文翻译

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