F75204
5 Pin Description
IN
- input pin with schmitt trigger.
OUT
P
- Open-drain output pin
-Power.
4.1. Pin Description
F75204
Pin Name
Type
Description
Open drain output. Power Switch Control Output.
Out
This pin can be used as the enable signal for the power switch, which
controls the VBUS of the USB charging port.
CEN(#)
1
External pull high: CEN
External pull down: CEN#
-
CEN(#)_Strap
2
3
4
USB negative data-channel to external USB device
USB positive data-channel to external USB device
Ground
Analog
Analog
Ground
DM
DP
GND
VCC
5
6
P
Power
USB positive data-channel to USB controller (HOST)
Analog
TDP
7
8
USB negative data-channel to USB controller (HOST)
Analog
IN
TDM
CB
Mode Selection Pin, CB = 1 Transmission Mode; CB = 0 Charger Mode.
6 Function Description
6.1 F75204 General Function Description
6.1.1 Mode Description & Selection
The F75204 USB charger controller can be configured to operate either as the bridge or USB
devices identification circuit. Users can alternate between modes by a digital input mode control
pin – CB. In the transmission Mode, as it shows below in Figure 6.1, the F75204 acts as a USB
bridge which connect the D+/D- data line of the host to the USB device.
In Charger Mode, the F75204 supplies the voltage to the D+ and D- lines from the internal
resistor-divider. If the device attached is BC 1.2-compliant, the F75204 will automatically shorts D+
and D- data line to allow correct charger detection.
Dec., 2011
V0.16P
3
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
