DS_FT311D USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000660 Clearance No.: FTDI# 305
8.3 USB to PWM Converter
P Channel Power
MOSFET
5V_SW
Switched 5V Power to
USB
5V
0.1uF
0.1uF
3V3
3V3
REGULATOR
VCC
VBUSCTRL#
IOBUS0
Ferrite
Bead
VCCIO
5V_SW
1
MOTOR
CONTROLLER
PWM_0
PWM_1
RESET#
27R
27R
2
3
3V3
USBDM
USBDP
IOBUS1
4
470R
PWM_2
PWM_3
IOBUS2
5
47pF
47pF
IOBUS3
SHIELD
FT311D
IOBUS4
IOBUS5
IOBUS6
IOBUS7
100nF
CNFG2
CNFG1
CNFG0
GND
GND
1V8 PLL VCC IN
GND
10k
3V3
VREGOUT
D
N
D
N
G
A
3V3
G
100nF
+
4.7uF
100nF
GND
GND
Figure 8.3 Application Example showing USB to PWM Converter
This example shows the CNFGx pins set for mode 010 – Pulse Width Modulation (PWM).
PWM channel 0 has been wired to a motor controller. This is typical of applications with robotic arms or
moving machinery.
PWM channel 3 has been connected to an LED. This allows the LED to either flash or by altering the PWM
switching frequency the controller can act as a “dimmer switch” to the LED.
The unused channels may be left unterminated.
Power to the USB port is enabled by the VBUSCTRL# signal
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