Overview
The LM74801QDRRRQ1 is an ideal diode controller produced by Texas Instruments, designed to drive and control external back-to-back N-Channel MOSFETs. This device emulates an ideal diode rectifier with power path ON/OFF control and overvoltage protection, making it suitable for various automotive applications. It operates within a wide input supply range of 3 V to 65 V, allowing protection and control of 12-V and 24-V automotive battery-powered Electronic Control Units (ECUs). The device can withstand negative supply voltages down to –65 V and features integrated ideal diode control for reverse input protection and output voltage holdup.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | –40 to 125 | °C |
| Input Voltage Range | 3 to 65 | V |
| Reverse Input Protection | Down to –65 V | V |
| Forward Voltage Drop Regulation | 10.5 mV (LM74800-Q1) | mV |
| Reverse Detection Threshold | –4.5 mV | mV |
| Peak Gate Turnon Current (DGATE) | 20 mA | mA |
| Peak Gate Turnoff Current (DGATE) | 2.6 A | A |
| Shutdown Current (EN/UVLO=Low) | 2.87 µA | µA |
| Package Type | 12-Pin WSON (DRR) | |
| Thermal Resistance (Junction-to-Ambient) | 60.9 °C/W | °C/W |
Key Features
- AEC-Q100 qualified for automotive applications
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2 and CDM ESD classification level C4B
- Drives external back-to-back N-Channel MOSFETs in common drain and common source configurations
- Ideal diode operation with low forward voltage drop regulation
- Low reverse detection threshold with fast response (0.5 µs)
- Adjustable overvoltage protection
- Meets automotive ISO7637 transient requirements with a suitable TVS diode
- Available in space-saving 12-Pin WSON package
Applications
- Automotive battery protection
- Advanced Driver Assistance Systems (ADAS) domain controllers
- Camera Electronic Control Units (ECUs)
- Head Units
- USB HUBs
- Active ORing for redundant power systems
Q & A
- What is the operating temperature range of the LM74801QDRRRQ1?
The operating temperature range is –40°C to +125°C.
- What is the input voltage range of the LM74801QDRRRQ1?
The input voltage range is 3 V to 65 V.
- How does the LM74801QDRRRQ1 protect against reverse input voltages?
The device provides reverse input protection down to –65 V.
- What is the forward voltage drop regulation for the LM74800-Q1 variant?
The forward voltage drop regulation is 10.5 mV.
- What is the peak gate turnon current for the DGATE?
The peak gate turnon current for the DGATE is 20 mA.
- How does the LM74801QDRRRQ1 meet automotive transient requirements?
The device meets automotive ISO7637 transient requirements with a suitable TVS diode.
- What package type is the LM74801QDRRRQ1 available in?
The device is available in a 12-Pin WSON (DRR) package.
- What is the thermal resistance (junction-to-ambient) of the LM74801QDRRRQ1?
The thermal resistance (junction-to-ambient) is 60.9 °C/W.
- What are some common applications of the LM74801QDRRRQ1?
Common applications include automotive battery protection, ADAS domain controllers, camera ECUs, head units, and USB HUBs.
- Does the LM74801QDRRRQ1 support active ORing for redundant power systems?
