Page 124 - Build Your Own Quadcopter_ Power Up Your Designs with the Parallax Elev-8

Chapter 5: Quadcopter Propulsors 103

Figure 5.12 25-A Turnigy MOSFET columns.

Figure 5.12 shows the back of the 25-A Turnigy board, on which you can easily see the
metal-oxide-semiconductor field-effect transistor (MOSFET) columns. Each column powers one
of the A, B, or C leads and contains five power MOSFETs that are connected in parallel so
that each one can handle up to a maximum of 5 amperes of current. The power MOSFET
used on this board is a generic p-channel type with a model number of 4407. As used here,
the term generic means that a variety of manufacturers can supply this chip as long as it
meets the functional specifications listed in Table 5.2.

Specification Description
Maximum voltage -30 V
Maximum current 15 A
Package SOP-8

Table 5.2 4407 Power MOSFET Specifications