SLUSDL4 February 2020 TPS59632-Q1
PRODUCTION DATA
The TPS59632-Q1 device uses a inductor valley current limiting scheme, so the ripple current must be considered. The DC current value at OCP is the OCP limit value plus half of the ripple current. Current limiting occurs on a phase-by-phase and pulse-by-pulse basis. Generally, the current is sensed using the sense resistor in series with the inductor for automotive applications giving a voltage between the CSPx and CSNx pins. If this sensed voltage is above the OCP limit, the converter delays the next ON pulse until that voltage difference drops below the OCP limit.
In OCP mode, the voltage drops until the UVP limit is reached. When UVP limit is reached the operation follows as described in the Section 7.3.14.