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Parker Vansco - High-Side Output Diagnostics and Fault Protection

Parker Vansco
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30 VMM2404
Outputs
of 50% will produce the worst case average current flow 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
specified continuous current for the output (in continuous mode, the average
current flow 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.
The grounds for the loads should be connected physically close to the
VMM2404 power grounds.
The following shows a typical high-side output connection:
Internal to product
High-Side
Output
Application
Load
Figure 12: Typical high-side output installation connections
4.1.3. High-Side Output Diagnostics and Fault Protection
The VMM2404 high-side outputs have the ability to report many different fault
conditions. They are protected against short-circuit and overcurrent, open load,
and short-to-battery faults.
Note: The VMM2404 LEDs can be used to indicate output fault status
through the application software.

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