The LM74912-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 with overvoltage, undervoltage and output short circuit 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. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) in case of overcurrent and overvoltage events using HGATE control. The device has integrated current sense amplifier which provides external MOSFET VDS sense based short circuit protection with an adjustable current limit. When short circuit condition is detected on the output then device latches off the load disconnect MOSFET. The device features an adjustable overvoltage cut-off protection feature. The device features a SLEEP mode which enables ultra low quiescent current consumption (6 µA) and at the same time providing refresh current to the always ON loads when vehicle is in the parking state. The LM74912-Q1 has a maximum voltage rating of 65 V.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM74912-Q1 Automotive Ideal Diode Controller With Fault Output and Overvoltage, Undervoltage, and Short Circuit Protection datasheet (Rev. A) | PDF | HTML | Sep 20, 2023 |
| Application note | Improving Accuracy of Shunt-Less Short Circuit Protection in Wide Temperature Range Using LM74912-Q1 | PDF | HTML | Sep 17, 2025 | |
| Functional safety information | LM74912-Q1 Functional safety FIT rate, FMD and Pin-FMA | PDF | HTML | Feb 18, 2025 | |
| Application brief | Enabling Ultra Low Quiescent Current Through LM74912- Q1 Sleep Mode While Powering Always On Loads | PDF | HTML | Dec 11, 2023 | |
| Certificate | LM74912Q1EVM EU Declaration of Conformity (DoC) | Jun 26, 2023 |
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The LM74912-Q1 evaluation module evaluates the operation and performance of the LM74912-Q1 ideal diode controller in reverse battery protection applications. This evaluation module demonstrates how LM74912-Q1 controls two back-back N-channel power MOSFETs to emulate an ideal diode rectifier with (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGE) | 24 | Ultra Librarian |
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