ACS761: 12 V High-Side Hot-Swap Hall Effect Based Current Monitor (Discontinued)

DISCONTINUED: This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: September 14th, 2022.

Recommended substitution: For existing customer transition, and for new customers or new applications, contact Allegro Sales.

The ACS761 combines Allegro Hall-effect current sense technology with a hot-swap controller resulting in a more efficient integrated controller for 12 V applications. By eliminating the need for a shunt resistor, the I²R losses in the power path are reduced.

When the ACS761 is externally enabled, and the voltage rail is above the internal UVLO threshold, the internal charge pump drives the gate of the external FET. When the load voltage reaches its target value PGOOD is asserted high. When a fault is detected, the gate is disabled while simultaneously alerting the application that a fault has occurred.

The integrated protection in the ACS761 incorporates three levels of fault protection, which includes a Power Fault with user-selectable delay, an Overcurrent Fault threshold with userselectable delay, and short circuit protection, which disables the gate in less than 2 µs. These faults are indicated to the host system via the Fault pin and are cleared upon reasserting enable high.

Minimum Order Value: Estimated annual volume must be > 100,000 units.