CAT3648: LED Driver, 4-Channel with 32 Dimming Levels
Description: The CAT3648 is a high efficiency fractional charge...
The CAT3648 is a high efficiency fractional charge pump that can drive up to four LEDs programmable by a one wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.
Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V.
The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all the LED channels. The 1-wire pulse-dimming interface supports 32 linear steps from full-scale down to zero current.
High efficiency 1.33x charge pump
Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
Drives up to 4 LEDs at 25 mA each
1-wire EZDim™ 32 linear steps
Power efficiency up to 92%
Low noise input ripple in all modes
'Zero' current shutdown mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
LCD Display Backlight
Digital Still Camera
Technical Documentation & Design Resources
Product Change Notification
Availability and Samples
Compliance: Pb-free Halide free
Description: LED Driver, 4-Channel with 32 Dimming Levels
Package Type: TQFN-16
Package Case Outline: 510AD
Container Type: REEL
Container Qty: 2000
Market Leadtime (weeks):2 to 4
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