DS_FT311D Datasheet, PDF (25/40 Pages) Future Technology Devices International Ltd. – The FT311D is a Full Speed USB host specifically targeted at providing access to peripheral hardware from an Android platform with a USB device port.

DS_FT311D USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000660 Clearance No.: FTDI# 305
8.3 USB to PWM Converter
5V
3V3
3V3
REGULATOR
P Channel Power
MOSFET
0.1uF
5V_SW
Switched 5V Power to
USB
0.1uF
1
2
3
4
5
SHIELD
Ferrite
Bead
5V_SW
27R
27R
47pF
47pF
100nF
GND
GND
3V3
100nF
+
4.7uF
GND
10k
3V3
VCC
VCCIO
RESET#
USBDM
USBDP
VBUSCTRL#
IOBUS0
IOBUS1
IOBUS2
CNFG2
CNFG1
CNFG0
IOBUS3
FT311D
IOBUS4
IOBUS5
IOBUS6
1V8 PLL VCC IN
VREGOUT
IOBUS7
PWM_0
PWM_1
PWM_2
PWM_3
100nF
GND
GND
MOTOR
CONTROLLER
3V3
470R
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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