Overcurrent protection comparator is qualified for automotive applications

Texas Instruments’ INA300-Q1 is a high common-mode, current-sensing comparator that detects overcurrent conditions by measuring the voltage developed across a current-sensing or shunt resistor. The device measures this differential voltage signal on common-mode voltages that can vary from 0V up to 36V, independent of the supply voltage. The device features an adjustable threshold range that is set using a single external limit-setting resistor. A selectable hysteresis feature enables adjustable operation of the comparator to accommodate the wide input signal range of 0mV to 250mV. An open-drain alert output on the device can be configured to operate in either a transparent mode where the output status follows the input state, or in a latched mode where the alert output is cleared when the latch is cleared. The device response time setting is selectable, which enables overcurrent alerts to be issued in as fast as 10µs. The device operates from a single 2.7V to 5.5V supply, drawing a maximum supply current of 135µA. The device is specified over the extended operating temperature range of –40C to +125C, and is available in a VSSOP-10 package.