ZHCSNL3A December 2021 – November 2023 TPSM8D6C24
PRODUCTION DATA
The TPSM8D6C24 power module uses a fixed-frequency, proprietary current-mode control. The switching frequency can be selected from preset values through pinstrapping or PMBus programming. The output voltage is sensed through a true differential remote sense amplifier and internal resistor divider, then compared to an internal voltage reference by an error amplifier. An internal oscillator initiates the turn-on of the high-side power switch. The error amplifier output is buffered and shared through VSHARE among stacked devices. This shared voltage is compared to the sensed switch node current to drive a linear voltage ramp modulator with input voltage, output voltage, and switching frequency feedforward to regulate the average switch-node current. As a synchronous buck converter, the device normally works in continuous conduction mode (CCM) under all load conditions. The compensation components are integrated and programmable through the PMBus command (B1h) USER_DATA_01 (COMPENSATION_CONFIG) or with the external pin MSEL1 to select preset values based on switching frequency and output LC filters.