User Guide
41
Outputs
Software fuse – The software samples the measured current at a predefined
rate and compares this value to a set of current ranges. In these ranges
multipliers are specified which either increment or decrement the fuse value
by a multiplier. If the fuse value reaches the trip point, the output is shut off.
The fuse value cannot be decremented below the minimum fuse value. This
mechanism is disabled in the event of a hard short circuit
Hardware overcurrent protection – The output has hardware overcurrent
protection which will disable the output when a potentially damaging
overcurrent situation is detected. The tripping threshold of the circuit is a
function of both current and time. The figure shows the envelope of inrush
current that the circuit is designed to permit. An inrush profile with currents
outside of this envelope is not guaranteed to pass through without tripping the
hardware overcurrent circuit.
Figure 17: Low Side output - 2.5A Inrush envelope
6.2.2. Low-Side Output with Current Sense Configuration
The low-side output with current sense is configured as follows:
The resistor used for sensing current maximizes the accuracy of the current
measurement.
