TLE7231GXT Infineon Technologies, TLE7231GXT Datasheet - Page 12

• Manufacturer Part Number: TLE7231GXT
• Manufacturer: Infineon Technologies

Specifications of TLE7231GXT

• Switch Type: Low Side
• Power Switch Family: TLE7231G
• Input Voltage: -0.3 to 5.5V
• Power Switch On Resistance: 1Ohm
• Output Current: 320mA
• Number Of Outputs: 4
• Mounting: Surface Mount
• Supply Current: 5mA
• Package Type: DSO
• Operating Temperature (min): -40C
• Operating Temperature (max): 150C
• Operating Temperature Classification: Automotive
• Pin Count: 24
• Lead Free Status / RoHS Status: Compliant

6
The TLE7231G is a four channel low-side relay switch.
The power stages are made of N-channel vertical power MOSFET transistors.
6.1
The TLE7231G has an input pin, that can be configured to be used for control of the output stages. The INn
parameter of the SPI provide the following operation modes:
•
•
•
•
Figure 4
Figure 4
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.
6.2
When switching off inductive loads, the potential at pin OUT rises to V
intends to continue driving the current. The voltage clamping is necessary to prevent destruction of the device,
see
Datasheet
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 IN
channel is switched on
channel is switched off with active diagnosis
Figure 5
shows the input circuit of TLE7231G.
Power Stages
Input Circuit
Input Multiplexer
Inductive Output Clamp
for details. Nevertheless, the maximum allowed load inductance is limited.
IN
I
IN
1
0
0
IN0
12
&
Channel 0
Channel 1
D0
Channel 2
SPI Driver for Enhanced Relay Control
Channel 3
DS(CL)
potential, because the inductance
SPIDER - TLE7231G
Rev. 1.0, 2008-02-28
Power Stages
InputLogic .emf