ZHCSFB9B June 2016 – March 2019 TPS63070
PRODUCTION DATA.
TPS6307x has a built in over-voltage protection which limits the output voltage. The voltage is internally sensed on the VOUT pin. In case the voltage on the feedback pin is not set correctly or the connection is open, this limits the output voltage to a value that protects the output stage from a too high voltage by limiting it to a internally set value.
Input over-voltage protection forces PFM mode to make sure the device is protected against boosting from the output to the input. This may happen if there is a large capacitor charged above the nominal voltage on the output and the supply on the input is removed. In PWM mode, the device is able to provide current from the output to the input causing a rise in the input voltage. In PFM mode, the current to the input is blocked so the input voltage can not rise. The input over-voltage protection does not protect the device from a too high voltage applied to the input but just from operating such that the device itself causes a rise of the input voltage above critical levels. Both over-voltage sensors are de-glitched by approximately 1µs.