The LM74610-Q1 is a controller device that can be used with an N-Channel MOSFET in a reverse polarity protection circuitry. It is designed to drive an external MOSFET to emulate an ideal diode rectifier when connected in series with a power source. A unique advantage of this scheme is that it is not referenced to ground and thus has Zero Iq.
The LM74610-Q1 controller provides a gate drive for an external N-Channel MOSFET and a fast response internal comparator to discharge the MOSFET Gate in the event of reverse polarity. This fast pull-down feature limits the amount and duration of reverse current flow if opposite polarity is sensed. The device design also meets CISPR25 Class 5 EMI specifications and automotive ISO7637 transient requirements with a suitable TVS diode.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM74610-Q1 | VSSOP (8) | 3.00 mm x 5.00 mm |
Changes from A Revision (October 2015) to B Revision
Changes from * Revision (July 2015) to A Revision
PIN | DESCRIPTION | |
---|---|---|
NO. | NAME | |
1 | VcapL | Charge Pump Output, connect to an external charge pump capacitor |
2 | Gate Pull Down | Connect to the gate of the external MOSFET for fast turn OFF in the case of reverse polarity |
3 | NC | No connect. Leave floating or connect to Anode pin |
4 | Anode | Anode of the diode, connect to source of the external MOSFET |
5 | NC | No connect. Leave floating or connect to gate drive pin |
6 | Gate Drive | Gate Drive output, Connect to the Gate of the external MOSFET |
7 | VcapH | Charge Pump Output, connect to an external charge pump capacitor |
8 | Cathode | Cathode of the diode, connect to Drain of the external MOSFET |