LP55281 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – Quad RGB Driver

June 2007
LP55281
Quad RGB Driver
General Description
LP55281 is a quad RGB LED driver for handheld devices. It
can drive 4 RGB LED sets and a single fun light LED. The
boost DC-DC converter drives high current loads with high
efficiency. The RGB driver can drive individual color LEDs or
RGB LEDs powered from boost output or external supply.
Built-in audio synchronization feature allows user to synchro-
nize the fun light LED to audio inputs. The flexible SPI/I²C
interface allows easy control of LP55281. Small Micro SMD
or Micro SMDxt package together with minimum number of
external components is a best fit for handheld devices.
LP55281 has also a LED test feature, which can be used for
example in production for checking the LED connections.
Features
■ ^{Audio synchronization for a single fun light LED}
■ ^{4 PWM controlled RGB LED drivers}
■ ^{High efficiency Boost DC-DC converter}
■ ^{SPI/I2C compatible interface}
■ ^{2 addresses in I2C compatible interface}
■ ^{LED connectivity test through the serial interface}
■ ^{Small 36-bump Micro SMD (3 mm x 3 mm x 0.6 mm) or}
36-bump Micro SMDxt package (3 mm x 3 mm x 0.65 mm)
Applications
■ ^{Cellular Phones}
■ ^{PDAs, MP3 players}
Typical Application
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