TDA5142 데이터 시트보기 (PDF) - Philips Electronics

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TDA5142

Brushless DC motor drive circuit

Philips Electronics 

Philips Semiconductors

Brushless DC motor drive circuit

BRAKE FUNCTION

• If the voltage on pin 8 is <2.3 V the motor brakes; in this

condition the external outputs are driven to a HIGH

voltage level.

• If pin 8 is floating or the voltage is >2.7 V the motor

runs normally.

RELIABILITY

It is necessary to protect high current circuits and the

output stages are protected in two ways:

• Current limiting of the ‘lower’ output transistors. The

‘upper’ output transistors use the same base current as

the conducting ‘lower’ transistor (+15%). This means

that the current to and from the output stages is limited.

• Thermal protection of the six output transistors is

achieved in such a way that the transistors are switched

off when the local temperature becomes too high.

Product specification

TDA5142T

June 1994

16

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