TLE8110ED datasheet(19/74 Pages) INFINEON

19 / 74 page

Data Sheet

Rev. 1.0

2018-03-07

TLE8110ED

Smart Multichannel Low Side Switch with Parallel Control and SPI Interface

Power Outputs

7.2

Description of the Clamping Structure

When switching off inductive loads, the potential at pin OUT rises to VDS(CL) potential, because the inductance

intends to continue driving the current. The clamping voltage is necessary to prevent destruction of the

device, see Figure 8 for the clamping circuit principle. Nevertheless, the maximum allowed load inductance is

limited.

Figure 8

Internal Clamping Principle

Clamping Energy

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

calculated with following equation:

(7.1)

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

Attention: It is strongly recommended to measure the load Energy and Current under operating

conditions, example of measurement setup is shown in Figure 9. Load small-signal parameters

might not reflect the real load behavior under operating conditions, see Figure 10. For more

details please refer to the Application Note “Switching Inductive Loads”.

Vbat

DScl

OUT

GND

OutputClamp.vsd

EVDS CL

()

------

VDS CL

()

VBAT

–

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

RL I

⋅

VDS CL

()

VBAT

–

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

⎝⎠

⎛⎞

⋅

–

⋅⋅

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