SPI Driver for Enhanced Relay Control

SPIDER - TLE7233EM

Power Stages

Data Sheet

16

Rev. 1.2, 2014-05-09

Maximum Load Inductance

During demagnetization of inductive loads, energy has to be dissipated in the TLE7233EM.

This energy can be calculated with following equation:

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

6.3

Timing Diagrams

The power transistors are switched on and off with a dedicated slope via the IN bits of the serial peripheral

Figure 7

Switching a Resistive Load

In input direct drive mode, a high signal at the input pin is equivalent to a SPI ON command and a low signal to

SPI OFF command respectively. Please refer to Chapter 9.3 for details on operation modes.

The listed switching times are not valid, when switching to or from stand-by mode.

–

DS(CL)

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

⋅

1

⋅

–

DS(CL)

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

–

⎝⎠

⎜⎟

⎛⎞

+

L

------

⋅⋅

=

E

1

2

---

2

1

–

DS(CL)

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

–

⎝⎠

⎜⎟

⎛⎞

⋅

=

CS

t

SwitchOn.emf

t

20%

80%

SPI: ON

SPI: OFF