Parker PHD Series User Manual

22 PHD
Inputs
3.4. Using inputs as low power outputs
Certain input pins, (GPIO1 through GPIO7) of the PHD28 and (GPIO2 through
GPIO6) of the PHD50, may be used as high side, low voltage / low current
outputs. All of the inputs (GPIO1 through GPIO10) of the PHD70 may be used this
way.
A software configurable internal pull-up to 5V provides the drive for this flexible
usage of the pins. These outputs are suitable for driving LEDs and other small
loads.
3.4.1. Low power, high-side output capabilities
The following table provides specifications for the inputs when used as low power
outputs.
Low Power Output Capabilities
Item
Min
Nom
Max
Unit
Operational voltage range
9
32
V
Output resistance w.r.t. GND (output off)
26.2
k
Output voltage
4.3
5.0
V
Output current
358
mA
Leakage current (output off)
1
µA
Output pin capacitance
10
nF
3.4.1.1. Low power, high-side output connections
You must be aware of the following when connecting the low power, high-side
outputs:
▪ the outputs are connected to the internal +5 Vdc supply through a pull-up
resistor. Each output is de-rated to 4.3 V. Maximum load on each output is
358 mA.
▪ the outputs can provide power to LED or other small loads in a vehicle.
When connecting the low power, high-side outputs, ensure you follow these best
practices:
▪ the outputs should not be connected to loads that will draw currents greater
than the maximum current.
▪ The grounds for the loads should be connected physically close to the PHD
power grounds.

Parker PHD Series Specifications

General

Brand	Parker
Model	PHD Series
Category	Control Unit
Language	English