TPS68401 Datasheet, PDF (1/37 Pages) Texas Instruments – MULTIFUNCTION 3-CHANNEL LED DRIVERS

TPS68401, TPS68402
www.ti.com
SLVSA68A – MARCH 2010 – REVISED JANUARY 2011
MULTIFUNCTION 3-CHANNEL LED DRIVERS
Check for Samples: TPS68401, TPS68402
FEATURES
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• Multifunction LED Driver With Three
Independent Channels
• Integrated High Efficiency 1x / 1.5x Charge
Pump With Automatic or Manual Gain Change
• 3 x 25.5-mA Total Output Current
• 3 x 25.5-mA Total Output Current
• Three Independent Program Execution
Engines (3 x 16 Instructions)
• 8-Bit PWM With Exponential Control Option
• 8-Bit Current DAC Control
• 200-nA Typical Shutdown Current
• Automatic Power-Save Mode
• Autonomous Operation Without External
Control
• Trigger I/O for Synchronizing Multiple Devices
• One or Two General Purpose Output
Controlled Via Serial Interface
• I²C Interface
• Operating Temperature Range: -30ºC to 85ºC
APPLICATIONS
• LED Control for Portable Applications
• Accent Lighting (Mood, Personalization, etc.)
• Function Indication (Charge, Messages, etc.)
• Keypad Illumination / Backlight (White or RGB)
• Display Backlight
DESCRIPTION
The TPS68401/TPS68402 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 I²C 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.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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