1 TPS1211-Q1 High Side Switch Controller Overview

The TPS1211-Q1 family is a 45-V smart high-side drivers with protection and diagnostics. With wide operating voltage range of 3.5 V – 40 V, the device is suitable for 12-V system designs. The device has a strong 3.7-A peak source (PU) and 4-A peak sink (PD) gate driver that enables power switching using parallel FETs in high current system designs. Use INP as the gate driver control input. MOSFET slew rate control (ON and OFF) is possible by placing external R-C components.

The device has accurate current sensing (±2 % at 30 mV) output (IMON) enabling system designs for energy management. The device has integrated two-level, overcurrent protection with FLT_I output with complete adjustability of thresholds and response time. Auto-retry and latch-off fault behavior can be configured. The device features remote overtemperature protection with FLT_T output enabling robust system protection. TPS12110-Q1 has an accurate overvoltage protection (< ±2 %), providing robust load protection. The TPS12111-Q1 integrates a precharge driver (G) with control input (INP_G).

This feature enables system designs that must drive large capacitive loads by precharging first and then turning ON the main power FETs. TPS1211-Q1 has an accurate undervoltage protection (< ±2 %) using the EN/UVLO pin. Pull EN/UVLO low (< 0.3 V) to turn OFF the device and enter into shutdown mode. In shutdown mode, the controller draws a total shutdown current of 0.9 µA (typical) at 12-V supply input. Figure 1-1 shows the TPS12111-Q1 functional block diagram.