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PDF UMFT231XC Data sheet ( Hoja de datos )
| Número de pieza | UMFT231XC | |
| Descripción | USB to UART | |
| Fabricantes | FTDI | |
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UMFT231XC Datasheet
Version 1.0
Document Reference No.: FT_000521 Clearance No.: FTDI# 273
Future Technology
Devices International
Ltd
Datasheet
UMFT231XC USB to UART
with Battery Charger
Support
UMFT231XC is a USB to UART development module with battery charging support.
1 Introduction
UMFT231XC is a development module designed
primarily for evaluating the battery charging
feature of FTDI’s X-Chip range of USB-interface
bridging ICs. This module is suitable for charging
single cell lithium-ion batteries.
UMFT231XC utilises an FT231XS and a battery
charging IC. FT231XS is one of the devices from
FTDI’s range of USB interface bridging IC devices.
FT231X is a USB to UART interface with a battery
charger detection feature, which can allow
batteries to be charged with a higher current from
a dedicated charger port (without the FT231X
being enumerated).
The module includes a LTC4053EDD, which is a
lithium-ion battery charger with thermal
regulation. FTDI X-Chips are designed to operate
with battery charger chips, such as the
LTC4053EDD, to facilitate charging a battery of a
device via USB slave port, with either 1 Amp of
current from a dedicated charger port or with up to
500mA from a USB host without violating USB
compliance regulations. The X-Chip family are
designed to implement this feature without the
requirement of external MOSFET or controller chips
to regulate the current divider network of the
LTC4053 chip.
The on-chip MTP ROM of the FT231XS is
programmed by default to support this specific
battery charging application. The MTP ROM can be
reconfigured to allow for adjustments using
FT_Prog. FT_Prog is available for free download
from the FTDI website.
1.1 Features
The UMFT231XC is fitted with a FT231XS. For a
full list of the FT231X’s features please see the
FT231X datasheet which can be found at the FTDI
website.
In addition to the features listed in the FT231X
datasheet, the UMFT231XC has the following
features:
Configured with a LTC4053EDD lithium-ion
battery charger
3 way 3.5mm screw terminal for connecting a
battery to the module
Thermal regulation safety feature
10 pin 0.1” female header used for UART
signals, 12 pin 0.1” female header for Power
and control
Status LEDs
Mini USB-B connector
Power MOSFET for suspending power supplied
to an external circuit from USB bus when in
USB suspend mode
Applications include
Prototyping and evaluating battery charging of
a device via a USB port
USB to UART communications
Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees
to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting
from such use.
1 page  
UMFT231XC Datasheet
Version 1.0
Document Reference No.: FT_000521 Clearance No.: FTDI# 273
4.3 CN4 Signal Descriptions
Pin No. Name
Type Description
5V power output USB port. For a low power USB bus powered design, up to
100mA can be sourced from the USB host/hub and applied to the USB bus. A
1
VBUS
Power maximum of 500mA can be sourced from the USB host/hub and applied to the
Output USB bus in a high power USB designs. A current draw up to 1A can be sourced
from a dedicated charger and applied to the USB bus. VBUS is an input for the
USB connector CN1.
2
VBATT
Power Connection to the battery’s positive terminal and LTC4053EDD regulated power
Output output used for charging the battery.
3
VBATT
Power Connection to the battery’s positive terminal and LTC4053EDD regulated power
Output output used for charging the battery.
4
GND
Ground Module ground supply pins
5
GND
Ground Module ground supply pins
6
SWPWR
Power Switchable power sourced from VBUS, when utilised VBUS shorted to SWPWR
Output when the FT231X is enumerated.
Output is low after the device has been configured by USB, then high during
7 PWREN# Output USB suspend mode. This is the default configuration, reprogramming the MTP
ROM can change this setup.
8
SLEEP#
Output
Low during USB suspend mode. This is the default configuration,
reprogramming the MTP ROM can change this setup.
9
CHRG#
Output
Low when battery is being charged. This is the default configuration,
reprogramming the MTP ROM can change this setup.
10
FAULT#
Output
Low when VBATT or NCT is out of range. This is the default configuration,
reprogramming the MTP ROM can change this setup.
11
ACPR#
Output
Low when VBUS is out of voltage range required to charge the battery. This is
the default configuration, reprogramming the MTP ROM can change this setup.
12
GND
Ground Module ground supply pins
Table 4.3 – CN4 Pin-Out Description
4.4 CN2 Signal Descriptions
The CN2 connector is a screw terminal. This connector can be used to connect the wires of a battery the
UMFT231XC module.
Pin No. Name Type
Description
1
+
Power
Positive power connection to the battery. Power is output from this pin when
charging; power is input through this pin when powering a load from the battery.
2
NTC
Safety
Feature
Negative Temperature Coefficient, a safety feature used to monitor the batteries
temperature, suspends charging when temperature falls out of the temperature
range of 0°C – 50°C (with a 2°C hysteresis at both thresholds).
3-
Ground Ground connection for the negative supply of the battery.
Table 4.4 – CN4 Pin Out Description
5
Copyright © 2012 Future Technology Devices International Limited
5 Page 
UMFT231XC Datasheet
Version 1.0
Document Reference No.: FT_000521 Clearance No.: FTDI# 273
8 UMFT231XA Module Circuit Schematic
Figure 8.1 – Module Circuit Schematic
11
Copyright © 2012 Future Technology Devices International Limited
11 Page | ||
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| PDF Descargar | [ Datasheet UMFT231XC.PDF ] | |
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