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.
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Exceeds HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- Maximum reverse voltage of 45 V
- No Positive Voltage limitation to Anode Terminal
- Charge Pump Gate Driver for External N-Channel
MOSFET - Lower Power Dissipation than Schottky
Diode/PFET Solutions - Low Reverse Leakage Current
- Zero IQ
- Fast 2-µs Response to Reverse Polarity
- –40°C to +125°C Operating Ambient Temperature
- Can be Used in OR-ing Applications
- Meets CISPR25 EMI Specification
- Meets Automotive ISO7637 Transient
Requirements with a Suitable TVS Diode - No Peak Current Limit
| Vin (min) (V) | 0.48 |
| Vin (max) (V) | 42 |
| Number of channels | 1 |
| Features | Automotive load dump compatibility, Linear control, Reverse current blocking, Reverse polarity protection |
| Iq (typ) (mA) | 0 |
| Iq (max) (mA) | 0 |
| FET | External single FET |
| IGate source (typ) (µA) | 10 |
| IGate source (max) (µA) | 9.4 |
| IGate sink (typ) (mA) | 0.01 |
| IGate pulsed (typ) (A) | 0.1 |
| Operating temperature range (°C) | -40 to 125 |
| IReverse (typ) (µA) | 110 |
| VSense reverse (typ) (mV) | 20 |
| Design support | EVM |
| Rating | Automotive |
| Imax (A) | 1.5 |
| VGS (max) (V) | 2.5 |
| Device type | Ideal diode controller |
| Product type | Ideal diode controller |