Datasheet > L9409

L9409

更新时间： 2024-11-22 14:58:19

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		电机稳压器
页数	文件大小	规格书
13页	161K
描述
具有负载响应控制的交流发电机稳压器

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L9409 数据手册

L9409

Alternator voltage regulator with load response control

Features

■ IC regulator for 12 V type alternator

■ Fixed frequency regulation loop

■ 130 mhigh side field driver

■ Fail safe device with double sensing of battery

voltage (VB and VS)

■ Load response control (LRC) function activates

'!0'03ꢀꢀꢀꢁꢂ

after an initial time delay

Multiwatt8

■ Self start function from phase frequency

■ “Z” shaped regulation curve compliant with VW

specification.

of sudden electrical loads during alternator low

speed operations (f < 310 Hz). Both the analog

and digital duty cycle are applied to a high side

driver.

■ Key recognition from L input

■ Field driver, lamp driver and relay driver short

protection

The device is able to regulate the voltage either

using a feedback signal from B pin or from S pin

depending on application needs. S pin is intended

to have a clear direct connection with the positive

terminal of the car battery. If this connection gets

lost the device will regulate voltage using B pin

giving a fail safe functionality.

■ Complex diagnostics

■ Thermal shutdown at 175 °C

Description

The L9409 is a monolithic multifunction alternator

voltage regulator intended for use in automotive

applications.

Using L pin is possible to sense key switch and a

pre-excitation duty cycle is applied on the field coil

in order to start phase voltage sensing. In the

case L connection gets lost, device starts to

generate using residual magnetism of the

generator.

The device regulates the output of an automotive

generator by controlling the field winding current

by means of either an analog fixed frequency

PWM signal or digital fixed frequency PWM signal

(LRC). The Load Response Control function is

activated in order to eliminate IC engine speed

fluctuation and vibrations caused by the insertion

Field, lamp and relay drivers are protected

against short circuit.

Order codes

Table 1. Device summary

Order code

Junction temp range, C

Package

Packing

L9409F

-40 to 150

Multiwatt8

Tube

September 2013

Doc ID 022665 Rev 2

1/13

www.st.com

12 3 4 5 6 7...13

中文翻译

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