7. Power Outputs
The PDM32 has 32 power outputs: 28 are High Side, while 4 can be configured High Side, Low Side
or possibly Half Bridge.
The max current that the PDM 32 may load is 120A: this value is related to High Side outputs use. When using
bridge outs in Low Side mode, please calculate 17A for GND pin connected (4 GND pins available).
Please, note that high level of continuous current can overheat the PDM if not properly installed.
The outputs are divided into the following groups:
o H1-H4: 4 High Power High Side outputs capable of delivering a maximum current of 20A continuous
and up to 100A inrush current.
H1 has a diode series to prevent reverse current from load. This output could be used for example
to directly drive a Starter.
All H type outs have an internal freewheeling diode that allow to connect high inductive loads, i.e.
Solenoids
o M1-M12: 12 Middle Power High Side outputs with a maximum output current of 15 A, and a
maximum inrush peak current of 80A.
o L1-L12: 12 Low Power High Side outputs with a maximum of 10 A supplied current, and a maximum
inrush peak of 35A.
o HB1-HB4: 4 Half Bridge/High Power outputs with a maximum of direct current supplied of 35 A, with
a maximum inrush peak current of 100 A.
The HB1-HB4 outputs can be used in two different ways: High Side or Low Side.
In High Side Mode they supply current, while in Low Side Mode the external device is powered by
the battery, and the output closes the circuit to ground. These 4 outputs can also be used paired as
Full Bridge: in this case, when an output works in High Side Mode, the complement is in Low Side
Mode. By alternating the two operating modes, the current reverses the direction: a typical
application of the use of Half bridges is the management of the wiper.
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