UCS1003-1
EVALUATION BOARD
USER’S GUIDE
2016 Microchip Technology Inc.
DS50002510A-page 23
Chapter 3. Hardware Description
3.1
UCS1003-1 DEVICE
The UCS1003-1 provides a single USB port power switch for precise control of up to
3.0A continuous current (2.85A typical) with overcurrent limiting, dynamic thermal
management, latch/auto-recovery upon fault, selectable active low or high enable,
under and overvoltage lockout, and back-drive protection.
USB Charging Port profiles are integrated into the UCS1003-1 to ensure compliance
to multiple standards. In addition to power switching and USB Charging Port profiling,
the UCS1003-1 provides automatic and configurable USB data line handshaking to
enable charging of USB-IF Battery Charging 1.2 (CDP or DCP modes), Chinese
Telecommunications Industry Standard YD/T 1591-2009, Apple
®
Inc., RIM
®
and many
other mobile devices.
The UCS1003-1 provides a device attachment detection output, as well as a dedicated
alert output, with current monitoring and charge rationing for controlled delivery of
current regardless of a host’s power state. When the limit is reached, the UCS1003-1
will perform the user-programmed behavior (report and disconnect is the default).
3.2
EVALUATION BOARD POWER SOURCE
The UCS1003-1 has split power supply support:
• V
S
is the voltage input to Power Switch. This supply rail is required to charge the
portable device. V
S
source is selected by populating a jumper on J5 header, as
follows:
• V
DD
is the power supply for chip functionality. The UCS1003-1 Evaluation Board
contains two additional ICs, MCP2221 USB bridge and MCP23018 I/O expander,
which are also powered from the V
DD
supply rail. V
DD
source is selected by
populating a jumper on the J4 header, as follows:
Jumper
Position
Definition
1-2
V
S
is supplied from the external 5V power supply connected to J1 power jack.
2-3
V
S
is supplied from the V
BUS
pin of the J3 USB connector. Use this option
only if the USB host port can supply the charging current for the portable
device.
Jumper
Position
Definition
1-2
V
DD
is supplied from V
BUS
pin of the J2 USB connector. When using the
board in this configuration and the Attach Detection feature of the UCS1003-1
is used, the V
S
voltage must not exceed V
DD
+ 150 mV, as specified in the
data sheet.
2-3
V
DD
is connected to V
S
. This configuration is recommended when using the
Attach Detection feature. If the board is evaluated with a PC running the GUI,
then the V
S
must be supplied after the USB cable is plugged into the J2
connector.
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
