Data Sheet

12

V1.4, 2010-04-26

TLE8104E

Smart Quad Channel Powertrain Switch

Electrical and Functional Description of Blocks

5.3.3

Inductive Output Clamp

current. The inductive output clamp is necessary to prevent destruction of the device. See Figure 6 for details.

The maximum allowed load inductance and current, however, are limited.

Figure 6

Inductive Output Clamp

Maximum Load Inductance

During demagnetization of inductive loads, energy has to be dissipated in the TLE8104E. This energy can be

calculated with following equation:

The energy, which is converted into heat, is limited by the thermal design of the component.

5.3.4

Protection Functions

The TLE8104E provides embedded protective functions. Integrated protection functions are designed to prevent

IC destruction under fault conditions described in this data sheet. Fault conditions are considered “outside” the

normal operating range. Protection functions are not designed for continuous repetitive operation.

Over load and over temperature protections are implemented in the TLE8104E. Figure 7 gives an overview of the

protective functions.

Figure 7

Protection Functions

V

bat

I

D

V

DS(CL)

OUT

V

DS

GND

L,

R

L

–

DS(CL)

------------------------------------- ln

⋅

1

⋅

–

DS(CL)

-------------------------------------

–







+

L

------

⋅⋅

=

E

1

2

---

2

1

–

DS(CL)

-------------------------------------

–







⋅

=

OUTn

SPI

INn

temperature

monitor

current

limitation

gate control

T

Tn

CLn

GND

CS

Input Control

SCLK

SI

SO