Datasheet > FA8A87N

FA8A87N

更新时间： 2024-11-19 15:18:39

品牌	Logo	应用领域
富士电机 - FUJI		/
页数	文件大小	规格书
32页	865K
描述
8pin SOP

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中文翻译

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数据手册

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FA8A87N 数据手册

Green mode PWM IC

FA8A87N

Datasheet

1. Overview

FA8A87N is a current mode type switching power supply control IC possible to drive a power MOSFET directly. In spite 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.

▆ Various Protection are built in.

• Overload protection (Latch)

1.27

• Integrated latch-off function based on external signals,

Package：SOP-8

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: -0.5 A(sink)/0.5 A（source）

Function list

External latch,

Discharge

function for X-

Capacitor

Brown out

protection

Type

Overload protection

Latch

Over-voltage protection,

Frequency

65kHz

Over heat protection

Latch

FA8A87N

Yes

3. Application circuit example

AC Input

Vout

(NC)

VCC

OUT

FA8A87N

LAT

GND

Mar,2019 DS-184E Rev1.0

1/32

12 3 4 5 6 7...32

中文翻译

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