Analog Devices Inc. LT8672 Active Rectifier Controllers

Analog Devices Inc. LT8672 Active Rectifier Controllers are AEC-Q100 qualified controllers designed for reverse input protection. These controllers drive an external N-channel MOSFET to replace a power Schottky diode. The LT8672 controllers ease the minimum input voltage requirement during cold crank and start-stop that allows simpler and more efficient circuits. If the input power source fails or is shorted, a fast turn-off minimizes reverse current transients. These controllers consist of an integrated auxiliary boost regulator that provides the required boost voltage to turn the external FET fully on. The LT8672 controllers feature ultrafast transient response, reverse input protection, wide operating voltage range, low shutdown current, and accurate enable pin threshold. Typical applications include automotive battery protection, industrial supplies, and portable instrumentation.

Features

-40V reverse input protection
Improved performance compared to a Schottky diode:
- >90% reduced power dissipation
- 20mV reduced drop
Ultrafast transient response:
- Rectifies 6V_P-P up to 50kHz
- Rectifies 2V_P-P up to 100kHz
3V to 42V wide operating voltage range
20µA low quiescent current in operation

3.5µA low shutdown current
1.21V accurate enable pin threshold
AEC-Q100 qualified for automotive applications
Small 10-Lead MSOP package, 10-Lead 3mm x 2mm DFN package, and 3mm x 2mm side-wettable DFN package

Applications

Automotive battery protection
Industrial supplies
Portable instrumentation

Block Diagram

Typical Application Circuit

Application Circuit Diagram - Analog Devices Inc. LT8672 Active Rectifier Controllers

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