Parker PVSG - 4 Outputs; Output Capabilities; High-Side Output Connection

PVSG User Guide
9
4. Outputs
e PVSG provides a switched battery (open source) digital output (OUTPUT1). is output includes
hardware short circuit protection if a short circuit fault is detected.
4.1. Output capabilities
e following table provides specications for the high-side outputs:
Item MIN NOM MAX UNIT
Maximum output current 0 32 V
Output load current range 0 250 mA
Short circuit current limit
Output Resistance - w.r.t. ground: Output off 9.86
Output Resistance - w.r.t. VBATT: Output on 1 3
Output leakage current: Output off 20 uA
Output current, fault detection (Output off state) 4.5 mA
Output PWM frequency 20 Hz
Output duty cycle 50 %
Turn on delay, Off to On 500 us
Turn off delay, On to Off 500 us
Turn on/off slew rate 0.7 V/us
Output pin capacitance 10 nF
4.2. High-side output connection
When connecting the high-side output, note that
• High-side output circuitry is connected internally to battery power (VBATT).
• High-side output can provide switched battery power to any load type in a vehicle.
• High-side output can source up to 0.25 A max.
• High-side output have internal yback diodes, which are needed when driving inductive loads (the
yback diodes absorb electrical energy when the load is turned o).
Inductive loads will create an average current ow that moves out of the high-side output. When the
output is on, the current ows through the output driver, and when the output is o, the current ows
through the yback diode. A duty cycle of 50% will produce the worst case average current ow through
these two devices.
Note: If large inductive loads are used, and the high-side output is providing a continuous PWM signal,
the PWM peak current must not be greater than the specied continuous current for the output (in
continuous mode, the average current ow through the diode at 50% duty cycle is approximately equal to
½ the peak current).
When connecting high-side outputs, ensure you follow these best practices:
• High-side outputs should not be connected to loads that will draw currents greater than the
maximum peak current, or maximum continuous current.
• e grounds for the loads should be connected physically close to the PVSG power grounds.