Datasheet > FA6A31N

FA6A31N

更新时间： 2024-03-03 10:09:40

品牌	Logo	应用领域
富士电机 - FUJI		/
页数	文件大小	规格书
46页	883K
描述
16pin SOP

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FA6A31N 数据手册

Current resonant control IC

FA6A30/31N

1. Overview

Datasheet

FA6A30/31N is a switching power supply control IC for LLC current resonant converter.

This IC enables a LLC current resonant converter for wide input voltage range without PFC. It incorporates a 600V start

up circuit, downsizing the circuit and enabling low-power consumption. It also incorporates a 600V high-side driver and low

side driver, which can drive directly both high-side and low-side MOSFETs with 50% duty cycle alternatively.

To ensure high reliability of the power supply, the arm-short prevention function, high-accuracy overload protection

function, and overcurrent protection function with adjustable delay time are provided.

In addition, low standby power is achieved with low standby mode selected by external signal, therefore auxiliary power

supply for standby can be removed.

Since a small package of 16 pins is used and the number of exterior parts is substantially reduced, space- and cost-

saving power supply can be obtained.

2. Features

・For wide input voltage range, LLC current resonant power supply system

can be configured without PFC.

・Integrated high-side and low-side drive circuits, which can be directly

connected to the power MOSFET and operates with 50% duty cycle.

・The integrated startup circuit achieves downsized power supply and lower

power consumption.

・Operating mode can be selected from normal operation mode, low standby

mode, and ultralow standby mode (STB pin)

・During the low standby mode, standby power is lowered by the burst mode

operation.

・Integrated input filter X-capacitor discharge function decreases loss due to

discharge resistance.

・Low consumption current, 0.65mA (Vcc quiescent current).

・Since the dead time is set automatically within the IC, switch-through and

hard switching are prevented.

・Various protection functions: overcurrent (IS pin), overload (VW,FB pin),

overvoltage (VH,VCC pin) and overheat.

・Integrated level-fixed brown-in/out function (VH pin)

・Level-adjustable brown-in/out function (BO pin)

Pacge：SOP-16

・Various condition settings, including external latch-off function, overcurrent

protection (detection by IS pin) delay time setting, operation setting in

standby mode, and PFC with/without setting, can be made (MODE pin).

・Built-in circuit for prevention of low-voltage malfunction (VCC,VB pin)

・Package: SOP-16 (compliant with JEDEC)

Protection functions

Protection by

external signal

(MODE pin)

Overload

(VW,FB pin)

Overcurrent

(IS pin)

Overvoltage

(VCC pin)

VCC voltage drop

(VCC pin)

Type name

FA6A30N

FA6A31N

Auto recovery

Latch

Auto recovery

Latch

Auto recovery

Nov., 2021 DS-142J Rev2.2

/46

12 3 4 5 6 7...46

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