TLE7233EM Datasheet, PDF (14/33 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

SPI Driver for Enhanced Relay Control
SPIDER - TLE7233EM
Power Stages
6
Power Stages
The TLE7233EM is a four channel low-side relay switch.
The power stages are made of N-channel vertical power MOSFET transistors.
6.1
Input Circuit
The TLE7233EM has four input pins, which can be configured to be used for control of the output stages. The INn
parameter of the SPI provide the following operation modes (see Figure 5):
• channel is in off mode without diagnosis
(if all channels are programmed to this mode, the device goes into idle mode)
• channel is switched according to signal level at input pin INn
• channel is switched on with active diagnosis
• channel is switched off with active diagnosis
Figure 4 shows the input circuit of TLE7233EM.
IN
I_IN
Figure 4
InputStage.emf
Input signal conditioning circuit on all input and limp home pins
The current sink to ground ensures that the channels switch off in case of open input pin. The zener diode protects
the input circuit against ESD pulses. After power-on reset, the device enters idle mode.
Data Sheet
14
Rev. 1.2, 2014-05-09