TI's smart diode controller realizes the power of zero

Texas Instruments LM74610-Q1

Industry's first zero quiescent current solution for reverse polarity protection in industrial power tool and automotive applications

Texas Instruments (TI) introduced the industry's first smart diode controller with zero quiescent current that provides better efficiency versus Schottky diodes and p-channel MOSFETs. The LM74610-Q1 provides lower power consumption and heat in a compact solution size, making it well-suited for reverse polarity protection in high-current industrial power tool and automotive applications.

Texas Instruments - LM74610-Q1

The LM74610-Q1 features a unique floating ground architecture that models a diode behavior with zero ground current. Paired with TI's CSD17313Q2Q1 NexFET™ n-channel MOSFET, the duo emulates a diode rectifier when connected in series with a power source, discharging the MOSFET gate in the event of reverse polarity. The LM74610-Q1 can also be used to combine two alternate power sources in an ORing configuration to provide redundancy.

LM74610-Q1 key features and benefits

  • Zero quiescent current eliminates battery drainage and extends battery life.
  • External n-channel MOSFET enables a scalable solution for a variety of current levels.
  • 45 V reverse voltage capability protects against automotive transients.
  • AEC-Q100 qualified with 4 kV ESD protection for automotive applications.

For automotive alternator and industrial power alternating current (AC) rectification, TI offers the LM74670-Q1 smart diode controller, which has higher gate drive current (70 µA) than the LM74610-Q1, allowing it to handle AC signals up to 300 Hz.

 The LM74610-Q1 Functional Block Diagram
The LM74610-Q1 Functional Block Diagram.

Design a 30-W advanced driver assistance (ADAS) system

Download the "System level reference design for 30-W ADAS system with required automotive protections" reference design of a multi-camera, surround view ADAS system with central processing. The design provides protection from reverse polarity and overvoltage using the LM74610-Q1 and 3-A LM53603-Q1 synchronous DC/DC converter, eliminating the need for a pre-boost during automotive start-stop and most cold crank conditions.

 System Level reference design for 30 W ADAS system with all required Automotive Protections
PMP10652.1 – System Level reference design for 30 W ADAS system
with all required Automotive Protections – Board (Top view).

Availability, packaging and pricing

Available in volume now from TI and its authorized distributors, the LM74610-Q1 is packaged in an 8-pin, 3-mm by 5-mm by 1.1-mm VSSOP package and priced at USin 1,000-unit quantities. Order an evaluation module for the LM74610-Q1.

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