TLE4226G Datasheet, PDF (4/15 Pages) Siemens Semiconductor Group – Intelligent Sixfold Low-Side Switch

TLE 4226 G
Application Description
Applications in automotive electronics call for intelligent power switches that can be activated by
logic signals, which have to be shorted load protected and which provide error feedback.
This IC contains six power switches connected to ground (low-side switches). On inductive loads
the integrated Z-diodes clamp the discharging voltage.
By means of TTL signals on the control inputs (active high) all six switches can be activated
independently of one another when a high level appears on the preferred-state input. When there
is a low level on the preferred-state input, switches 1 to 4 are switched on, switches 5 and 6 are
switched off regardless of the control-input levels. The inputs are highly resistive and therefore must
not be left unconnected but should always be on fixed potential (noise immunity). Inputs that are not
used, should be connected to low level to reduce the power consumption.
The analog status output signals the following errors by analog voltage levels:
– Overload
– Thermal overload
– Openload or shorted load to ground (only switches 5 and 6)
The following levels signal errors at the analog and digital status outputs.
Errors
Analog Status
Normal function
Low
Overload
1.0 V to 3.3 V
Openload or shorted load to ground (only switches 5 and 6) 1.0 V to 1.7 V
Thermal overload
> 3.5 V
Digital Status
High
Low
Low
Low
Possible Input and Output Levels
Supply Voltage V_S
2 to 5 V
5V
5V
PREFST
Low
High
High
IN1-6
Random
Low
High
Q1-Q4
Low
High
Low
Q5, Q6
High
High
Low
Semiconductor Group
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