Texas Instruments LM74670-Q1 Smart Diode Rectifier Controller
Texas Instruments LM74670-Q1 Smart Diode Rectifier Controller is a controller device that can be used with an N-Channel MOSFET in full or half-bridge rectifier architectures for alternators. This is designed to drive an external MOSFET to emulate an ideal diode. A unique advantage of this scheme is that it is not ground referenced, thus, it has zero IQ. The schottky diodes in full or half-bridge rectifiers and alternators can be replaced with the LM74670-Q1 solution to avoid forward conduction diode losses and produce more efficient AC-DC converters. The LM74670-Q1 controller provides a gate drive for external N-Channel MOSFET and a fast response internal comparator to pull down the MOSFET Gate in the event of reverse polarity. This device can support an AC signal frequency up to 300Hz.
Features
- AEC-Q100 Qualified with the following results:
- Device temperature grade 1: -40°C to +125°C ambient operating temperature range
- Exceeds HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- 42V Peak input AC voltage
- Zero IQ
- Charge pump gate driver for external N-channel MOSFET
- Low forward voltage drop and less power
- Dissipation compared to Schottky diode
- Capable of handling AC signal up to 300Hz frequency
Applications
- AC rectifier
- Alternator
- Power tools
- Reverse polarity protection
Associated Product
Texas Instruments LM74670-SQEVM Evaluation Module (EVM)
Demonstrates reverse polarity protection as a replacement of Schottky Diodes and N-Channel MOSFETs.
Block Diagram
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Publicado: 2016-02-09
| Actualizado: 2025-03-06