Has anyone used the very impressive and low cost mosfet drivers in an H bridge to drive a motor directly? The 4422 is rated at 2A cont, 9amp peak. My motor draws is about 3 - 5 amps.
On the net I found someone driving small motors directly with the 3amp
4424 dual mosfet driver.I will need 2 x 4422 to make an H bridge, but thinking I could even parallel the 4422 (4 total) for more current capacity.
Anyone have experience with these devices?
You'll be more impressed with a half bridge FET drivers, with external FETs. Most FET drivers are not designed for power dissipation and the effective Ron is pathetic compared to what you can achieve with a couple of cheap discrete mosfets. You'll need to recharge the bootstrap cap with say a 1us 'off' pulse, every 10 seconds for a permanently driven motor.
example, Farnell are stocking LM5104M 100V H-driver @ A$5.09 x1 FDS6990S dual 30V 0.022R @ $2.37 x1
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