Datasheet > AP3981B

AP3981B

更新时间： 2024-11-26 14:55:19

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
17页	506K
描述
Primary Side Regulated power switcher

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中文翻译

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AP3981B 数据手册

AP3981B

PRIMARY SIDE REGULATED POWER SWITCHER

Description

Pin Assignments

The AP3981B is a high performance power switcher integrated with a

primary side regulation controller and an N-channel power MOSFET.

It can be used for battery charger and adaptor applications, accurate

Constant Voltage (CV) and Constant Current (CC) can be achieved

without an opto-coupler and secondary control circuitry.

(Top View)

GND

The AP3981B operates in Pulse Frequency Modulation (PFM) mode

and peak current Amplitude Modulation (AM) mode to form a fine tune

frequency curve within the whole power range. Therefore, the

AP3981B can achieve high average efficiency and improve audible

noise.

VCC

DRAIN

The AP3981B provides comprehensive protections without additional

circuitry. It contains V_CCover voltage protection, output over voltage

protection, output under voltage protection, output short circuit

protection, cycle-by-cycle current limit, open loop protection, and

internal OTP, etc.

SOURCE

SO-7

The AP3981B is available in SO-7 package.

Features



Primary-Side Control for Eliminating Opto-Coupler

Built-In 650V Power MOSFET

75mW No-Load Input Power

Flyback Topology in DCM Operation

External Adjustable Line Compensation for CC

Fixed Internal Cable Compensation

Multiple Segment AM/PFM Control Mode to Improve Audio

Noise and Efficiency

Applications



Routers

Set-Top Box (STB) Power Supply

Network Adaptors



Frequency Jitter to Improve System EMI

Capacitive Load Start-Up Capability

Valley-On for the Higher Efficiency and Better EMI Behavior

Multiple Protections:



Secondary-Side Over Voltage Protection (SOVP)

Secondary-Side Under Voltage Protection (SUVP)

Output Short Circuit Protection (SCP)

Transformer Saturation Protection (TSP) via Primary Peak

Current Limitation



Internal Over Temperature Protection (OTP)



SO-7 Package

The Recommended Output Power is up to 7.5W

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) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ 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 17

www.diodes.com

AP3981B

Document number: DS41422 Rev. 2 - 2

May 2019

12 3 4 5 6 7...17

中文翻译

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与AP3981B相关器件

型号	品牌	获取价格	描述	数据表
AP3981C	DIODES	获取价格	Primary Side Regulated power switcher
AP3981D2	DIODES	获取价格	Primary Side Regulated power switcher
AP3983B	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983BCD	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983BMTR-G1	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983C	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983CMTR-G1	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983CP7-G1	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983D	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
AP3983DP7-G1	DIODES	获取价格	HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS

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