Overview: 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 pliance 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.
