RBO40-40M データシートの表示（PDF） - STMicroelectronics

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RBO40-40M

REVERSED BATTERY AND OVERVOLTAGE PROTECTION CIRCUIT (RBO)

STMicroelectronics 

RBO40-40G / RBO40-40M / RBO40-40T

PRODUCT DESCRIPTION

1

3

The RBO has 3 functionsintegrated on the same

chip.

D1 : “Diode function” in order to protect against

reversed battery operation.

T2 : “Transil function” in order to protect against

positive surge generated by electric systems

(ignition, relay. ...).

T1 : Protectionfor motor drive application

(See below).

2

BASIC APPLICATION

* The monolithic multi-function protection

(RBO) has been developed to protect

sensitive semicond uctors in car electronic

modules against both overvoltage and

battery reverse.

* In addition, the RBO circuit prevents

overvoltages generated by the module from

affecting the car supply network.

MOTOR DRIVER APPLICATION

BATTERY

Filter

D1

T2

T1

MOTOR

RBO

DEVICE

MOTOR CONTROL

In this application, one half of the motor drive circuit is supplied through the “RBO” and is thus protected

as per its basic function application.

The second part is connected directly to the “car supply network” and is protected as follows :

- For positive surges : T2 (clamping phase) and D1 in forward-biased.

- For negative surges : T1 (clamping phase) and T2 in forward-biased.

4/15

®

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