Datasheet > E-TDA7476

E-TDA7476

更新时间： 2024-02-12 22:00:56

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		光电二极管商用集成电路
页数	文件大小	规格书
19页	178K
描述
SPECIALTY CONSUMER CIRCUIT, PDSO24, SOP-24

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技术参数
数据手册

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E-TDA7476 技术参数

生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP,	针数：	24
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
Factory Lead Time：	13 weeks	风险等级：	5.12
商用集成电路类型：	CONSUMER CIRCUIT	JESD-30 代码：	R-PDSO-G24
长度：	15.4 mm	功能数量：	1
端子数量：	24	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	认证状态：	Not Qualified
座面最大高度：	2.65 mm	表面贴装：	YES
技术：	BCDMOS	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
宽度：	7.5 mm	Base Number Matches：	1

E-TDA7476 数据手册

TDA7476

1) The amplifier can drain current in the resistive path of the short circuit, hence this current and consequently

the short circuit resistor cannot be determined with a sufficient level of accuracy.

2) The voltage difference between the car radio ground (reference) and the position of the chassis of the car

where the loudspeaker line is connected (due to an accidental short circuit) can be up to some hundreds of

mV. This does not permit a correct measure of the short circuit resistor.

Turn-on diagnostic - AUX1, AUX2

To detect if there is a short circuit to GND or an open load involving to the AUX output of the car radio, the volt-

age across a sensing resistor Rsens is detected.These output voltages (for example for the active antenna and

for the booster) are usually generated by high side drivers, but also voltage regulators with Vout >5V are admis-

sible. The detection ranges can be set by adjusting the sensing resistors Rsens1 or Rsens2 as following:

S.C. to GND

Normal Operation

Open Load

I₁

I₂

I₃

I₄

D01AU1258

OL,max

= ---------------------

sens

nop,min

= ----------------------

sens

nop,max

= -----------------------

sens

gnd,min

= ----------------------

sens

Where A , Anop, Agnd are as specified in the ELECTRICAL CHARACTERISTICS.

For example, if Rsens = 5 Ohm, the following detection table will be operative :

S.C. to GND

Normal Operation

Open Load

170mA 100mA

25mA 17mA

D96AU503

Permanent diagnostic - CH1, CH2, CH3, CH4, CH5 - Short to GND and Vs

During the CAR-RADIO normal operation, to detect a short circuit to GND (or to Vs), the output voltages are

sensed. If one or more outputs stay at any voltage below 0.8V or over Vs-0.6V for more than 2 sec. (typ), the

warning pin is pulled down.The µP can address the TDA7476 to know the status.The subsonic current pulse is

activated also in this case. The fault is correctly detected if it remains until the memorization (tm in fig.1).In this

phase, faults regarding shorts across the load and open loads cannot be detected.

7/19

1...4 5 678 9 10...19

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与E-TDA7476相关器件

型号	品牌	描述	获取价格	数据表
E-TDA7476013TR	STMICROELECTRONICS	SPECIALTY CONSUMER CIRCUIT, PDSO24, SOP-24	获取价格
E-TDA7478AD	STMICROELECTRONICS	SINGLE CHIP RDS DEMODULATOR	获取价格
E-TDA7478ADTR	STMICROELECTRONICS	暂无描述	获取价格
E-TDA7478D	STMICROELECTRONICS	SPECIALTY CONSUMER CIRCUIT, PDSO16, SOP-16	获取价格
E-TDA7478DTR	STMICROELECTRONICS	SPECIALTY CONSUMER CIRCUIT, PDSO16, 4.40 MM, MO-153AB, TSSOP-16	获取价格
E-TDA7479AD	STMICROELECTRONICS	Single chip RDS demodulator filter	获取价格

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