Datasheet Texas Instruments LM2755TMX/NOPB — Datenblatt

LM2755
www.ti.com SNVS433D – OCTOBER 2007 – REVISED APRIL 2013 LM2755 Charge Pump LED Controller with I2C-Compatible Interface in DSBGA Package
Check for Samples: LM2755 FEATURES DESCRIPTION The LM2755 is a charge-pump-based, constant
current LED driver capable of driving 3 LEDs with a
total output current up to 90mA. The diode current
waveforms of each LED can be trapezoidal with
timing and level parameters (rise time, fall time, high
level, low level, delay, high time, low time)
programmed via an I2C-compatible interface. The 32
brightness levels found on the LM2755 are
exponentially spaced (as opposed to linearly spaced)
to better match the response of the human eye to
changing brightness levels. 1 2 90% Peak Efficiency
Total solution size < 13mm2
No Inductor Required: Only 4 Inexpensive
Ceramic Caps
3 Independently Controlled Constant Current
Outputs
Programmable Trapezoidal Dimming
Waveform on Each Output
Programmable Timing Control Via Internal
Registers and External Clock Synchronization
Input …