DESCRIPTION
The dual high side switches have built-in thermal shut-down to protect the chip from over temperature and short circuit, status output to provide indication for open load in off and on state, overtemperature conditions and stuck-on to VCC. The low side switches are two OMNIFET types (fully autoprotected Power MOSFET in VIPower™ technology). They have built-in thermal shut-down, linear current limitation and overvoltage clamping. Fault feedback for thermal intervention can be detected by monitoring the voltage at the input pin. DUAL HIGH-SIDE SWITCH From the falling edge of the input signal, the status output, initially low to signal a fault condition (overtemperature or open load on-state), will go back to a high state with a different delay in case of overtemperature (tpovl) and in case of open open load (tpol) respectively. This feature allows to discriminate the nature of the detected fault. To protect the device against September 1998 SO-28 short circuit and over current condition, the thermal protection turns the integrated Power MOS off at a minimum junction temperature of 140 oC.
STMicroelectronics
