Calculation tool
FET-INRUSH-SOA-CALC — FET SOA margin calculator for dvdt based startup
The design calculator allows user to estimate the FET SOA margin while starting up with dVdt based startup for inrush current control
LM7481-Q1
Automotive ideal diode controller with active rectification driving B2B NFETs
Data sheet
LM7481-Q1
- 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
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.
Similar products you might be interested in
Drop-in replacement with upgraded functionality to the compared device
Technical documentation
No results found. Please clear your search and try again.
View all 9 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM7481-Q1 Ideal Diode Controller with Active Rectification and Load Dump Protection datasheet (Rev. A) | PDF | HTML | 07 Dec 2020 |
| Application note | Basics of Ideal Diodes (Rev. B) | PDF | HTML | 05 Oct 2021 | |
| EVM User's guide | LM74810 Evaluation Module: LM74810EVM (Rev. A) | PDF | HTML | 09 Dec 2020 | |
| Analog Design Journal | Automotive EMC-compliant reverse-battery protection with ideal-diode controllers | 22 Sep 2020 | ||
| Application note | Ideal Diode Controllers for Active Rectification of AC Voltage Ripple | 30 Jun 2020 | ||
| Functional safety information | Streamlining Functional Safety Certification in Automotive and Industrial | 09 Jun 2020 | ||
| White paper | 簡化汽車及工業領域的功 能安全認證 | 09 Jun 2020 | ||
| White paper | 자동차 및 산업 분야의 기능적 안전성 인증 간소화 | 09 Jun 2020 | ||
| Application note | Six System Architectures With Robust Reverse Battery Protection | 30 Apr 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM74810EVM — LM7481-Q1 ideal diode controller evaluation module
TI's Evaluation Module LM74810EVM helps designers evaluate the operation and performance of the LM7481-Q1 ideal diode controllers (LM74810QDRR) in reverse battery protection applications. This evaluation module demonstrates LM7481-Q1 Ideal Diode controller's capability to provide reverse battery (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs
TIDA-020033 — Automotive Class-H audio and tracking power supply reference design
This reference design demonstrates a Class-H audio and tracking power supply audio subsystem. The TAS6584-Q1 audio amplifier tracks the envelope of the digital audio input and adjusts the LM5123-Q1 boost output voltage to meet the power efficiency requirements without the need for an external (...)
Design guide: PDF
Reference designs
TIDA-020040 — Automotive transient and overcurrent protection filter reference design
This reference design showcases a protection system for voltage and current transient events typically found in automotive systems. This reference design optimizes functionality, size and protection capabilities while not sacrificing power delivery for premium audio amplifiers.
| Package | Pins | Download |
|---|---|---|
| WSON (DRR) | 12 | View options |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.