Ribble's blog archive for April, 2012 - RC Groups
Ribble's blog View Details
Archive for April, 2012
Posted by Ribble | Apr 04, 2012 @ 08:11 PM | 6,035 Views
DH9104 NOTES - Motor FETs and Motor Amps
fly4fun6719 pulled a part number off one of the DH9104 motor switching FETs.
Part number is: CEP73A3G

N-Channel Enhancement Mode Field Effect Transistor
30V, 62A,
RDS(ON) = 9mW @VGS = 10V
RDS(ON) = 16mW @VGS = 4.5V.
Super high dense cell design for extremely low RDS(ON).

"Purchased a IRF1405 mosfet from the local electronics store and fitted it..I tried it with the receiver out of the helicopter and it appears to work ok.The only problem I had was removing the original mosfet. I haven't done this sought of work for some years and I am a bit rusty."

IRF1405 should work as a replacement for any Syma or Double Horse receiver board.
Note: Input control Voltage Gate to Source is 5.0v for 20 amps motor current, though it does start switching ON between 2.0 and 4.0 Volts.

VDSS = 55V
RDS(on) = 5.3mΩ
ID = 169A


IRFZ44N IRFZ44 Power MOSFET N-Channel International Rectifier - Banggood

DH9104 tail motor was 2.99 amps full speed off 7.4v 1300mah Li-Ion stock battery.

Main motor 5.72 amps full speed off 7.4v 1300mah Li-Ion stock battery.

Non-motor load = 23ma = receiver and forward white floodlight LED (Transmitter turned off)
Receiver without LED and motors = 16.1ma (Transmitter turned off)
...Continue Reading