TLE75080-EMH Datasheet, PDF(40/80 Page) Infineon Technologies AG

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TLE75080-EMH Datasheet, PDF (40/80 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

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TLE75080-EMH

Power Stages

VS High-side

Channel

GND

VSn

VDS

VDS (CL)

OUTn

V OUT(CL)

I L_S

VOUTn

Figure 16 Output Clamp concept

PowerStage_HS.emf

7.1.3 Maximum Load Inductance

During demagnetization of inductive loads, energy has to be dissipated in the TLE75080-EMH. Equation (7.1)

and Equation (7.2) can be used for high-side switches :

E = (VS â VOUTS(CL)) â

V-----O----U---T---S---(--C---L---)

V-----O-R---U-L--T--â-S--I-(-L-C---L---)â â

â --L----

(7.1)

E = (VS â VOUT(CL)) â

V-----O----U---T---(--C---L---)

ln ââ1

V----R-O----UL---T-â--(-I-C-L--L---)â â

â --L----

(7.2)

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

value provided in Table 2 assumes that all channels can dissipate the same energy when the inductances

connected to the outputs are demagnetized at the same time.

7.2

Inverse Current Behavior

During inverse current (VOUTn > VSn) the affected channels stays in ON- or in OFF- state. Furthermore, during

applied inverse currents the ERRn bit can be set if the channel is in ON-state and the over temperature threshold

is reached.

The general functionality (switch ON and OFF, protection, diagnostic) of unaffected channels is not influenced by

inverse currents applied to other channels. Parameter deviations are possible especially for the following ones

(Over Temperature protection is not influenced):

â¢ Switching capability: tON, tOFF, dV/dtON, -dV/dtOFF

â¢ Protection: IL(OVL0), IL(OVL1)

â¢ Diagnostic: VOUT(OL), IL(OL)

Reliability in Limp Home condition for the unaffected channels is unchanged.

Note: No protection mechanism like temperature protection or over load protection is active during applied inverse

currents. Inverse currents cause power losses inside the DMOS, which increase the overall device

temperature. This could lead to a switch OFF of unaffected channels due to Over Temperature

Data Sheet

Rev. 1.0, 2016-06-22

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