Automotive ideal diode controller with active rectification driving B2B NFETs
Product details
Parameters
Package | Pins | Size
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
- Device CDM ESD classification level C4B
- 3-V to 65-V input range
- Reverse input protection down to –65 V
- Drives external back to back N-channel MOSFETs
- Ideal diode operation with 9.1-mV A to C forward voltage drop regulation
- Low reverse detection threshold (–4 mV) with fast response (0.5 µs)
- Active rectification up to 200-KHz
- 60-mA peak gate (DGATE) turn-on current
- 2.6-A peak DGATE turnoff current
- Integrated 3.8-mA charge pump
- Adjustable over voltage protection
- Low 2.87 µA shutdown current (EN/UVLO=Low)
- 2.6-A peak DGATE turn-off current
- Meets automotive ISO7637 transient requirements with a suitable TVS diode
- Available in space saving 12-Pin WSON package
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Description
The LM74810-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF control and over voltage protection. The wide input supply of 3 V to 65 V allows protection and control of 12-V and 24-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65 V. An integrated ideal diode controller (DGATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. A strong charge pump of 3.8 mA with 60-mA peak GATE source current driver stage and short turn ON and turn OFF delay times ensures fast transient response ensuring robust and efficient MOSFET switching performance during automotive testing such as ISO16750 or LV124 where an ECU is subjected to input short interruptions and AC superimpose input signals upto 200-KHz frequency. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) and over voltage protection using HGATE control. The device features an adjustable over voltage cut-off protection feature for load dump protection.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM7481-Q1 Ideal Diode Controller with Active Rectification and Load Dump Protection datasheet (Rev. A) | Dec. 07, 2020 |
User guide | LM74810 Evaluation Module: LM74810EVM (Rev. A) | Dec. 09, 2020 | |
Application note | Automotive EMC-compliant reverse-battery protection with ideal-diode controllers | Sep. 22, 2020 | |
Application note | Ideal Diode Controllers for Active Rectification of AC Voltage Ripple | Jun. 30, 2020 | |
White paper | Streamlining Functional Safety Certification in Automotive and Industrial | Jun. 09, 2020 | |
White paper | 簡化汽車及工業領域的功 能安全認證 | Jun. 09, 2020 | |
White paper | 자동차 및 산업 분야의 기능적 안전성 인증 간소화 | Jun. 09, 2020 | |
Application note | Six System Architectures With Robust Reverse Battery Protection Using an Ideal D | Apr. 30, 2020 | |
Application note | Basics of Ideal Diodes | May 09, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Reverse battery protection for high power ECU designs
- Switched output and power path cut-off
- Over voltage protection
- Meets automotive transient immunity test requirements
- Two external N-Channel MOSFETs connected back-back in common drain configuration
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-020040 BOM.pdf (97KB) -
download TIDA-020040 Assembly Drawing.pdf (211KB) -
download TIDA-020040 PCB.pdf (874KB) -
download TIDA-020040 CAD Files.zip (2084KB) -
download TIDA-020040 Gerber.zip (725KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SON (DRR) | 12 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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