FT231XQ-T FTDI, FT231XQ-T Datasheet - Page 29

• Manufacturer Part Number: FT231XQ-T
• Description: USB Interface IC USB to Full Serial UART IC QFN-20
• Manufacturer: FTDI

Specifications of FT231XQ-T

• Rohs: yes
• Tradename: X-Chip

Figure 7.5 USB Battery Charging Detection (2 pin)
In the example above the FT231X SLEEP pin is used to enable/disable the LTC4053, while the PWREN#
signal alters the charging current by altering the resistance on the LTC4053 PROG pin.
A third option shown in the example below uses the SLEEP signal from the FT231X to enable / disable the
battery charger. The BCD# and PWREN# signals are then used to alter the resistance on the PROG pin of
the LTC4053 which controls the charge current drawn from the USB connector.
0.1uF
EEPROM Setting
VBUS
GND
X-Chip Pin
CBUS5
CBUS6
VBUS
GND
CN USB
SLD
4.7uF
VBUS
GND
GND
D+
D-
ID
0R
Function
N.F.
SLEEP#
PWREN#
0.1uF
1
2
3
4
5
GND
VBUS
GND
10nF
Copyright © 2013 Future Technology Devices International Limited
600R/2A
VBUS
GND
De-acticate Sleep
Force Power Enable
Battery Charger Enable
Battery Options
27R
27R
0.1uF
1
2
3
4
5
3V3OUT
GND
VCC
GND
CHRG
FAULT
TIMER
U1
GND
DM
DP
3V3OUT
RESET#
LTC4053EDD
VBUS
ACPR
SHDN
PROG
X
X
X
BAT
NTC
GND
3V3OUT
10
9
8
7
6
JUMPER-2mm
GND
CBUS5
CBUS6
2K2
VBUS
FT231X USB TO FULL HANDSHAKE UART IC
FT231X
4K32 1%
GND
16K5 1%
NTC
SLEEP#
PWREN#
SLEEP#
0.4A when enumerated
0A when in sleep mode
JP1
SIP-3
NTC
0.4A when connected to a dedicated charger port
0.1A when not enumerated and not in sleep mode
4K32 1%
Document No.: FT_000565 Clearance No.:
PWREN#
VBUS
GND
GND
0.1uF
3V3OUT
GND
JP1
1-2
2-3
VBATT
GND
NCT Available
0.1uF
1R
1uF
NCT Enabled
NCT Disabled (Default)
GND
TB3.5mm
1
+
-
NCT
Datasheet
Version 1.2
FTDI# 261
29