Data Sheet

16

Rev. 1.0, 2010-05-28

High Current H-Bridge

BTM7745G

Block Description and Characteristics

6.3.5

Short Circuit Protection

The device provides embedded protection functions against

•

output short circuit to ground

•

output short circuit to supply voltage

•

short circuit of load

The short circuit protection is realized by the previously described current limitation in combination with the over-

temperature shut down (see Chapter 6.3.3) of the device.

6.3.6

Pos.

Parameter

Symbol

Limit Values

Unit

Test Conditions

Min.

Typ.

Max.

Over Voltage Lock Out

Switch-ON voltage

27.8

–

–

V

Switch-OFF voltage

28

–

30

V

ON/OFF hysteresis

–

0.2

–

V

1) Not subject to production test, specified by design.

1)

Under Voltage Shut Down

Switch-ON voltage

–

–

5.5

V

Switch-OFF voltage

4.0

–

5.4

V

ON/OFF hysteresis

–

0.2

–

V

1)

Thermal Shut Down

Thermal shut down junction

temperature

155

175

200

°C

1); V

Thermal switch on junction

temperature

153

–

190

°C

1)

Thermal hysteresis

ΔT

–

7

–

°C

1)

Reset pulse at INH and IN pin

(INH, IN1 and IN2 low)

8

–

–

µs

1)

Current Limitation

Current limitation detection

level high side

6

12

16

A

Current limitation detection

level low side

6

12

16

A

Shut off time for HS and LS

50

100

200

µs

Electrical Characteristics - Protection Functions

V

flowing into pin (unless otherwise specified)

6.3.1

6.3.2

6.3.3

6.3.4

6.3.5

6.3.6

6.3.7

6.3.8

6.3.9

6.3.10

6.3.11

6.3.12

6.3.13