ZHCSCR7A June 2014 – November 2020 TPS2559
PRODUCTION DATA
The FAULT open-drain output is asserted (active low) during an over-current or over-temperature condition. The TPS2559 asserts the FAULT signal until the fault condition is removed and the device resumes normal operation. The TPS2559 is designed to eliminate false FAULT reporting by using an internal delay "deglitch" circuit for over-current (9-ms typ.) conditions without the need for external circuitry. This ensures that FAULT is not accidentally asserted due to normal operation such as starting into a heavy capacitive load. The deglitch circuitry delays entering and leaving current-limit induced fault conditions. The FAULT signal is not deglitched when the MOSFET is disabled due to an over-temperature condition but is deglitched after the device has cooled and begins to turn on. This unidirectional deglitch prevents FAULT oscillation during an over-temperature event.