BTS6143D datasheet(10/18 Pages) INFINEON

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PROFET® BTS 6143 D

Data Sheet

10 of 18

Rev. 1.0, 2007-02

Reversave

 (Reverse battery protection)

Logic

OUT

Power GND

Signal GND

Vbb

Power

Transistor

RIS typ. 1 k

Ω. Add RIN for reverse battery protection in

applications with Vbb above 16V;

recommended value:

−

To minimise power dissipation at reverse battery

operation, the overall current into the IN and IS pin

should be about 80mA. The current can be provided by

using a small signal diode D in parallel to the input

switch, by using a MOSFET input switch or by proper

adjusting the current through RIS.

Since the current via Rbb generates additional heat in

the device, this has to be taken into account in the

overall thermal consideration.

Inverse load current operation

PROFET

OUT

Vbb

VOUT

- IL

R IS

IIS

The device can be operated in inverse load current

mode (VOUT > Vbb > 0V). The current sense feature is

not available during this kind of operation (IIS = 0). In

case of inverse operation the intrinsic drain source

diode is eventually conducting resulting in considerably

increased power dissipation.

The transition from inverse to forward mode can result

in a delayed switch on.

Note: Temperature protection during inverse load

current operation is not possible!

Vbb disconnect with energised inductive

load

Provide a current path with load current capability by

using a diode, a Z-diode, or a varistor. (VZL+VD<39 V if

RIN = 0). For higher clamp voltages currents at IN and

IS have to be limited to 120 mA.

Version a:

PROFET

OUT

VZL

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