SLVSFS6A May 2021 – September 2021 TPS629210-Q1
The TPS629210-Q1 is protected against overload and short circuit events. If the inductor current exceeds the current limit ILIM_HS, the high-side switch is turned off and the low-side switch is turned on to ramp down the inductor current. The high-side FET turns on again only if the current in the low-side FET has decreased below the low-side current limit threshold ILIM_LS.
Due to internal propagation delay, the actual current can exceed the static current limit during that time. The dynamic current limit is given in Equation 1.
The current limit can exceed static values, especially if the input voltage is high and very small inductances are used. The dynamic high-side switch peak current can be calculated as follows: