Thread: Discussion H-bridge motor controller
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Old Apr 04, 2012, 01:12 AM
KiwiDavid is offline
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I would have to disagree that LL FETs need 10v gate drive to turn on fully. Many are fully rated at 4.5V drive and display little improvement at 10v drive. There's even a growing number of FETs rated to 1.8V drive.
The attached is a device I use in a brushed PWM motor controller and is driven off a PIC micro running from 5V. The difference in Rds On at 4.5V and 10V is almost academic.

Cheers,
David
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