Datasheet > AP3981C

AP3981C

更新时间： 2024-11-26 14:53:55

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
16页	516K
描述
Primary Side Regulated power switcher

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中文翻译

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AP3981C 数据手册

AP3981C

PRIMARY SIDE REGULATED POWER SWITCHER

Description

Pin Assignments

(Top View)

The AP3981C is a high performance power switchers integrated with

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.

GND

Drain

The AP3981C 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

AP3981C can achieve high average efficiency and improve audible

noise.

VCC

Drain

SOURCE

The AP3981C 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 over temperature protection, etc.

SO-8

Applications



Routers

The AP3981C is available in SO-8 package.

Set-Top Box (STB) Power Supply

Network Adaptors

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



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-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) & 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 16

www.diodes.com

AP3981C

Document number: DS41619 Rev. 2 - 2

June 2019

12 3 4 5 6 7...16

中文翻译

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与AP3981C相关器件

型号	品牌	获取价格	描述	数据表
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
AP3983EP7-G1	DIODES	获取价格	Switching Controller,

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