User's Guide
SLVU812 – November 2012
TPS68401EVM User’s Guide
The TPS68401EVM is an evaluation board to assist in evaluating the TPS68401 IC as a multifunction LED
driver.
The TPS68401 device is an advanced lighting management unit for handheld devices. It has three
independent channels optimized for driving RGB LEDs. The built-in fractional charge pump boosts the
input voltage to power the LEDs at low input voltage. Channel one can optionally be supplied directly from
the battery voltage to reduce power consumption and improve efficiency.
At the heart of the device is a programmable state machine which executes a lighting program consisting
of up to 16 instructions per channel. Once the program is loaded through the I
2
C™ interface the device is
fully independent from the main processor resulting in significant system-level power savings. The device
can issue an interrupt to the main processor via the INT pin. The TRIG I/O allows synchronization
between multiple devices. A general-purpose output pin is provided which is addressable through the
serial interface. In addition, the INT pin can also be configured as general-purpose output.
Figure 1. TPS68401EVM
The following related documents are available for download through the Texas Instruments web site
(
http://www.ti.com
) or via the links below.
Table 1. EVM Related Data Sheets
DEVICE
LITERATURE NUMBER
TPS68401
SLVSA68
USB-TO-GPIO
SLLU093
1
SLVU812 – November 2012
TPS68401EVM User’s Guide
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