LM74700D-Q1
- AEC-Q100 qualified with the following results
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- 3.2-V to 65-V input range (3.9-V start-up)
- –65-V reverse voltage rating
- Charge pump for external N-Channel MOSFET
- 20-mV ANODE to CATHODE forward voltage drop regulation
- Enable pin feature
- 1-µA shutdown current (EN=Low)
- 80-µA operating quiescent current (EN=High)
- 2.3-A peak gate turn-off current
- < 0.75-µs response to reverse current blocking
- Meets automotive ISO7637 transient requirements with a suitable TVS Diode
- Available in an 8-pin SOIC package
The LM74700D-Q1 is an automotive AEC Q100 qualified ideal diode controller, which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V, and 48-V automotive battery systems. The 3.2-V input voltage support is particularly well designed for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.
The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn-off of the MOSFET during a reverse current event and makes sure of zero DC reverse current flow. Fast response (< 0.75 µs) to reverse current blocking makes the device designed for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.
The LM74700D-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700D-Q1 helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM74700D-Q1 Automotive Low IQ Reverse Battery Protection Ideal Diode Controller datasheet | PDF | HTML | 2022. 5. 12 | |
| 아날로그 디자인 학술지 | 캐스케이드 방식의 이상적인 다이오드: 48V EV 전원 문제 해결 | PDF | HTML | Download English Version | 2025. 12. 30 |
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