Overview
The LM74720-Q1, produced by Texas Instruments, is an automotive-grade, low quiescent current ideal diode controller. This device is designed to drive and control external back-to-back N-Channel MOSFETs, emulating an ideal diode rectifier with power path ON/OFF control and overvoltage protection. It is AEC-Q100 qualified, ensuring reliability and performance in automotive applications. The LM74720-Q1 features a wide input supply range of 3 V to 65 V, making it suitable for protecting and controlling 12-V and 24-V automotive battery-powered Electronic Control Units (ECUs).
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 3 V to 65 V |
| Reverse Input Protection | Down to –65 V |
| Quiescent Current (Operation) | 35 µA (max) |
| Quiescent Current (Shutdown, EN = Low) | 3.3 µA (max) |
| Forward Voltage Drop Regulation | 17-mV A to C |
| Active Rectification Frequency | Up to 100 kHz |
| Response Time to Reverse Current Blocking | 0.5 µs |
| Integrated Boost Regulator Current | 29 mA |
| Ambient Operating Temperature Range | –40°C to +125°C |
| Package Type | 12-pin WSON |
| ESD Classification | HBM Level 2, CDM Level C4B |
Key Features
- Ideal diode operation with 17-mV A to C forward voltage drop regulation.
- Drives external back-to-back N-Channel MOSFETs for power path control.
- Integrated 29-mA boost regulator for efficient MOSFET switching.
- Fast response to reverse current blocking: 0.5 µs.
- Active rectification up to 100 kHz.
- Adjustable overvoltage protection for load dump protection.
- Meets automotive ISO7637 transient requirements with a suitable TVS diode.
- Low quiescent current enables always ON system designs.
- Load disconnect control using EN pin.
- Pin-to-pin compatible with LM74721-Q1.
Applications
- Automotive Electronic Control Units (ECUs) powered by 12-V and 24-V batteries.
- Power management in automotive systems requiring high reliability and low quiescent current.
- Systems needing protection from negative supply voltages and load dump conditions.
- Applications requiring efficient and robust MOSFET switching performance.
Q & A
- What is the input voltage range of the LM74720-Q1?
The input voltage range is 3 V to 65 V.
- What is the quiescent current of the LM74720-Q1 in operation?
The quiescent current is 35 µA (max) in operation.
- How does the LM74720-Q1 protect against reverse input voltages?
The device provides reverse input protection down to –65 V.
- What is the response time to reverse current blocking?
The response time is 0.5 µs.
- Does the LM74720-Q1 have an integrated boost regulator?
Yes, it has an integrated 29-mA boost regulator.
- What is the ambient operating temperature range of the LM74720-Q1?
The ambient operating temperature range is –40°C to +125°C.
- Is the LM74720-Q1 AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified.
- What type of package is the LM74720-Q1 available in?
The device is available in a 12-pin WSON package.
- Does the LM74720-Q1 support active rectification?
Yes, it supports active rectification up to 100 kHz.
- Can the overvoltage protection be adjusted on the LM74720-Q1?
Yes, the overvoltage protection is adjustable for load dump protection.
