The LM74670-Q1 is a controller device that can be used with an N-Channel MOSFET in full or half bridge rectifier architectures for alternators. It 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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM74670-Q1 Zero IQ Smart Diode Rectifier Controller datasheet (Rev. A) | PDF | HTML | 27 Oct 2015 |
| E-book | 11 Ways to Protect Your Power Path | 03 Jul 2019 | ||
| EVM User's guide | LM74670-SQEVM User's Guide | 20 Oct 2015 |
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The LM74670-SQEVM evaluation module demostrates reverse polarity protection as a replacement of Schottkey Diodes and P-Channel MOSFETs. In this reverse polarity protection solution the LM74670 Smart Diode Controller is used to provide a gate drive for 40V (VDS) external N-Channel MOSFET. The (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
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