A4401

更新时间： 2024-11-09 12:51:19

品牌	Logo	应用领域
急速微 - ALLEGRO		显示器驱动
页数	文件大小	规格书
17页	417K
描述
This device provides all the necessary control functions to provide the power rails for driving a vacuum fluorescent display (VFD) using minimal external components.

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A4401 数据手册

A4401

Automotive Quasi-Resonant Flyback Control IC

Features and Benefits

Description

▪ Multiple output regulator

This device provides all the necessary control functions to

provide the power rails for driving a vacuum fluorescent

display(VFD)usingminimalexternalcomponents.Thepower

supply is based on a quasi-resonant, discontinuous flyback

converter, operating near the critical conduction boundary. A

novel adaptive turn-on control scheme is used to optimize the

turn-on and turn-off phase of the MOSFET, to reduce EMI

emissions while minimizing switching losses.

▪ 7 to 40 V input supply

▪ Low EMI conducted and radiated emissions

▪ Adaptive quasi-resonant turn on/off control

▪ Minimal number of external components

▪ Enable input which can be driven with respect to the

battery voltage

The converter is self-oscillating, operating at switching

frequencies depending on the input voltage, load, and external

components. An onboard linear regulator that is powered

directly from the battery provides the housekeeping supply,

avoiding the need for complex bias supplies.

Internal diagnostics provide comprehensive protection

against overloads, input undervoltage, and overtemperature

conditions.

Package: 8-pin narrow SOIC (suffix L)

The A4401 is supplied in an 8-pin narrow SOIC package

(suffix L), which is lead (Pb) free, with 100% matte-tin

leadframe plating.

Approximate Scale 1:1

Typical Application

+V_BAT

VFD

VIN

A4401

0 V

ISS

ECU

GND

COMP

A4401-DS, Rev. 2

12 3 4 5 6 7...17

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