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Fabricante

TLE5203

3-A DC Motor Driver

Infineon Technologies 

TLE 5203

Output Shorted to + VS and Overload Detection

An internal circuit detects if the current through the low side transistor is higher than 4 A

typ. In this case all outputs are turned off after 40 µs and the error flag EF is set to

ground.

At a junction temperature higher than 160 °C the thermal shutdown turns off, all four

output stages commonly and the error flag is set without a delay.

Open Load Detection

The output Q1 has a 10 kΩ pull-up resistor and the output Q2 has a 10 kΩ pull-down

resistor. If E1 and E2 are high, all output power stages are turned-OFF. In case of no

load between Q1 and Q2 the output voltage Q1 is VS and Q2 is ground. This state will

be detected by two comparators and an error flag will be set after a delay time of 40 µs.

Changing the inputs resets the error flip flop.

Diagnosis

Input Output

E1 E2 Q1 Q2

L L HL

L HL H

H LLL

H HZ Z

Shorted

to GND

Q1

Q2

–

–

Diagnosis

Shorted

to VS

Q2

Overload

X

Q1

X

Q1, Q2

–

–

–

EF

Open Load

–

L

–

L

–

L

X

L

Semiconductor Group

5

1998-02-01

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