Datasheet > FA8A81N

FA8A81N

更新时间： 2024-11-19 15:19:19

品牌	Logo	应用领域
富士电机 - FUJI		/
页数	文件大小	规格书
36页	1039K
描述
8pin SOP

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中文翻译

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数据手册

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FA8A81N 数据手册

Green mode PWM IC

FA8A80N / 81N / 90N / 91N

1. Overview

Datasheet

FA8A80N/81N/90N/91N is a current mode type switching power supply control IC possible to drive a power MOSFET

directly. Despite of a small package with 8 pins, it has a lot of functions and it is best suited for power saving at the light load

and decreasing external parts. Moreover it enables to realize a reduced space and a high cost-performance power supply.

2. Features

▆ Realization of low standby power

• Built-in discharge function for AC input filter capacitor (XCAP).

(Reduce loss of the discharge resistor)

• Integrated frequency decrease function improves efficiency

in the middle-load region. (Frequency decrease start point is

adjustable based on the settings of mounted parts.)

• Intermittent operation (burst operation) system adopted for light load

operation achieves low standby power. (Burst operation start point is

5.0±0.25

adjustable based on the settings of mounted parts.)

• Switching is allowed between normal operation mode and power-off mode.

In power-off mode, lower standby power is ensured.

• Built-in 650V high voltage startup circuit.

1.27

▆ Various Protection are built in.

• Overload protection (Auto recovery, Latch)

• Integrated function of correcting overload detection level depending on

AC input voltage

Package：SOP-8

(Correction amount is adjustable based on the settings of externally mounted parts.)

• Integrated latch-off function based on external signals, overvoltage protection function, low-voltage prevention

function, and overheat protection function

• Internal Soft-Start

• The lowest frequency is set to 25 kHz to prevent operation at audible frequency under light load.

▆ Switching frequency jitter function realize low EMI.

▆ Internal DSS (Dynamic Self Supply)

▆ Drive circuit for MOSFET: -0.5A(sink)/0.5A（source）

Function list by types

Discharge

function for X-

Capacitor

External latch, over-

voltage protection, Over

heat protection

Brown out

protection

Type

Overload protection

Frequency

65kHz

FA8A80N

FA8A81N

FA8A90N

FA8A91N

Automatic recovery

Latch

Automatic recovery

Latch

Yes

3. Application circuit example

AC Input

Vout

(NC)

VCC

OUT

FA8A80N

LAT

GND

July,2016 DS-171E Rev1.0

1/36

12 3 4 5 6 7...36

中文翻译

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