UC1825A-SP

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SLUS873B – JANUARY 2009 – REVISED OCTOBER 2015

5 Description (continued)

Functional improvements have also been implemented in this device family. The UC1825 shutdown comparator

is now a high-speed overcurrent comparator with a threshold of 1.2 V. The overcurrent comparator sets a latch

that ensures full discharge of the soft-start capacitor before allowing a restart. While the fault latch is set, the

outputs are in the low state. In the event of continuous faults, the soft-start capacitor is fully charged before

discharge to insure that the fault frequency does not exceed the designed soft start period. The UC1825 CLOCK

pin has become CLK/LEB. This pin combines the functions of clock output and leading edge blanking adjustment

and has been buffered for easier interfacing.

The UC1825A has dual alternating outputs and the same pin configuration of the UC1825. The UC1825A version

parts have UVLO thresholds identical to the original UC1825.

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Product Folder Links: UC1825A-SP