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CAT3612_08 Datasheet, PDF (1/14 Pages) Catalyst Semiconductor – Programmable 300mA Camera Flash LED Driver
CAT3612
Programmable 300mA Camera Flash LED Driver
FEATURES
„ Dual matched regulated LED channels
„ 300mA output current (150mA per channel)
„ 1-wire EZDimTM Programmable LED Current
„ 32 accurate dimming levels
„ Power efficiency up to 90%
„ Fractional pump 1x/1.5x
„ Low noise input ripple
„ Fixed High Frequency Operation 1MHz
„ “Zero” Current Shutdown Mode
„ Soft start and current limiting
„ Short circuit protection
„ Thermal shutdown protection
„ 12-lead TDFN 3mm x 3mm package
APPLICATION
„ Camera Flash
„ Cellular Phones
„ Digital Still Cameras
ORDERING INFORMATION
Quantity Package
Part Number Package per Reel Marking
CAT3612HV2-T2 TDFN-12 (1) 2000 HAAD
CAT3612HV2-GT2 TDFN-12 (2) 2000 HAAF
Notes: (1) Matte-Tin Plated Finish (RoHS-compliant).
(2) NiPdAu Plated Finish (RoHS-compliant).
PRODUCT DESCRIPTION
The CAT3612 is a high-efficiency 1x/1.5x fractional
charge pump with programmable current in two LED
channels. Each channel delivers accurate regulated
current up to 150mA and make CAT3612 ideal for
driving one or two flash LEDs.
Low noise operation is achieved by operating at a
constant switching frequency of 1MHz which allows
the use of small external ceramic capacitors. The
1x/1.5x fractional charge pump supports a wide
range of input voltages from 3V to 5.5V with
efficiency up to 90%, and is ideal for Li-Ion battery
powered devices.
The EN/DIM logic input provides a 1-wire EZDimTM
interface for dimming control of the LEDs. When
enabled, pulsing the EN/DIM reduces the LED
current on each negative edge in 31 linear steps
from 150mA down to zero current.
The device is available in the tiny 12-lead thin DFN
3mm x 3mm package with a max height of 0.8mm.
For Ordering Information details, see page 13.
PIN CONFIGURATION
Top View
TYPICAL APPLICATION CIRCUIT
12-lead TDFN 3mm x 3mm
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Note: Unused LED channel must be connected to VOUT
1
Doc. No. MD-5016 Rev. B
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