L9407F

更新时间： 2024-02-03 14:21:31

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器模拟IC 信号电路电机 LTE 局域网
页数	文件大小	规格书
11页	126K
描述
CAR ALTERNATOR VOLTAGE REGULATOR

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L9407F 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SFM
包装说明：	, SIP8,.1TB	针数：	8
Reach Compliance Code：	not_compliant	HTS代码：	8542.39.00.01
风险等级：	5.57	Is Samacsys：	N
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PSFM-T8
JESD-609代码：	e3	功能数量：	1
端子数量：	8	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	SIP8,.1TB	封装形状：	RECTANGULAR
封装形式：	FLANGE MOUNT	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	6/18 V	认证状态：	Not Qualified
子类别：	Automotive Circuits	最大供电电流 (Isup)：	50 mA
最大供电电压 (Vsup)：	18 V	最小供电电压 (Vsup)：	6 V
表面贴装：	NO	端子面层：	Matte Tin (Sn)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

L9407F 数据手册

L9407F

CAR ALTERNATOR VOLTAGE REGULATOR

PRODUCT PREVIEW

■ FULLY MONOLITHIC DESIGN

■ LOW SIDE FIELD DRIVER

■ THERMAL PROTECTION

■ FIELD SHORT CIRCUIT PROTECTION

■ PROTECTED DIAGNOSTIC LAMP DRIVER

■ PROTECTED HIGH SIDE RELAY DRIVER

■ COMPLEX DIAGNOSTICS

Multiwatt 8

■ LOAD RESPONSE CONTROL

■ DFM OUTPUT (FIELD MONITOR)

ORDERING NUMBER: L9407F

DESCRIPTION

The L9407F is a monolithic multifunction alternator

voltage regulator intended for use in automotive ap-

plication. It includes the control section, the field pow-

er stage, fault diagnostic circuit which drives a

warning lamp, and the protection against short cir-

cuits.

device also with very long cables connecting the al-

ternator to the battery with an impedance so high to

cause a superimposed ripple on the alternator volt-

age higher than 5-6V. Consequently it doesn't need,

in the standard application, any external component.

Anyway an external application (2.2uF or 2.7uF)

must be inserted between A+ and ground when using

the device with very long cables.

CIRCUIT OPERATION

The alternator's voltage regulator performs the fol-

lowing main functions:

PROTECTION

– 1) voltage regulation

– 2) protection

It is present a protection against short circuits of the

lamp and the relay power drivers (D+) and of the field

power driver (DF), a thermal drivers shutdown pro-

tection and an overvoltage protection of D+ power

drivers.

– 3) control fault diagnosis

– 4) load response control

VOLTAGE REGULATION

DIAGNOSIS

The alternator voltage is compared with a reference

voltage in an amplifier, whose output determines the

switching frequency of output power MOS whose

current excites the coil of the alternator; as the regu-

lators are a self-oscillating type this frequency de-

pends on the whole system parameter set including

the alternator characteristics. The regulators have an

integrated filter in the voltage sensing path guaran-

teeing the correct behaviour of the devices also when

the rectifier diodes feature very high switching

spikes. The internal filtering allows the usage of the

The circuit detects fault conditions related to the

phase and DF status and receives informations from

one of the three alternator phases. In order to prevent

spurious indications, fault warnings are not displayed

immediately but are dalayed by a fixed time.

LOAD RESPONSE CONTROL

The internal circuit regulates the soft start character-

istics (activated always at engine start) and the soft

attack characteristics.

February 2003

1/11

This is preliminary information on a new product now in development. Details are subject to change without notice.

12 3 4 5 6 7...11

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