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TPS2552D, TPS2553D

SLVSDL7 – SEPTEMBER 2016

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Product Folder Links: TPS2552D TPS2553D

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10.2.2.2 Detailed Design Procedure

Refer to Programming the Current-Limit Threshold section for the current limit setting. For auto-retry functionality,

once FAULT asserted, EN pull low, TPS2553D is disabled, FAULT des-asserted, CRETRY is slowly charged to EN

logic high via RFAULT, then enable, after deglitch time, FAULT asserted again. In the event of an over-load,

TPS2553D cycles and has output average current. ON-time with output current is decided by FAULT deglitch

time. OFF-time without output current is decided by RFAULT x CRETRY constant time to EN logic high and ton time.

Therefore, set the RFAULT × CRETRY to get the desired output average current during overload.