1200V Current limiter with enable and over‑temperature protection

The 17SCT004A is a high-voltage current limiter with overtemperature protection. When the enable signal is applied, the high voltage (HV) terminal sinks a constant current that is temperature limited. Upon removing the enable signal, the 17SCT004A presents a very-high resistance to the HV terminal. The sink current can be user-programmed to 4 target values for maximum system flexibility. In all case the maximum junction temperature is internally limited to about 150C. This allows the 17SCT004A to very efficiently discharge high-voltage capacitors when needed while protecting itself and surrounding circuitry.