Parker PHD28, User Manual, Page: 32 / 157

24 PHD
Outputs
Low-Side Output Specifications
Parameter Min Nom Max Unit
Output current 500 mA
On resistance 550
m

Max. voltage applied to pin 36 V
Current limit in short-to-ground
condition 1.0 1.5 1.9 A
Max PWM Frequency 2000 Hz
Pull-down resistance (PHD28/50) 402.4
k

Pull-down resistance (PHD70) 436.5
k

Feedback gain (V
micro
/V
pin
) (see note)
3/33 V/V
Feedback max readable voltage 33 V
Feedback cut-off (3dB) frequency 32 Hz
Note: V
micro
is the voltage at the micro A/D pin, and V
pin
is at the external connector pin. The
tolerance of the V
pin
measurement using nominal gain is ±0.5 V.
Low-Side Output Error Detection
Driver State Output Condition Feedback voltage Error Detected?
Off Open 0 V No
Off Short-to-battery Vsw/11 Yes
Off Short-to-ground 0 V No
On Open 0 V No
On Short >Vsw/11 (see note) Yes
Note: An over-temperature fault results in driver output cycling.
4.1.1.1. Low-side output connections
When connecting low-side outputs, note that
▪
low-side outputs are connected to a common internal ground point that is
connected to the battery ground (GND).
▪
low-side outputs provide switched ground to any load type in a vehicle.
▪
low-side outputs can sink up to 0.5 A.
When connecting a load to a low-side output, ensure that the load will not drive
currents greater than the maximum specified peak current or the maximum
specified continuous current.