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ON Semiconductor - 3-Channel Ultra High Efficiency LED Driver

Numéro de référence CAT3647
Description 3-Channel Ultra High Efficiency LED Driver
Fabricant ON Semiconductor 
Logo ON Semiconductor 





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CAT3647 fiche technique
CAT3647
3-Channel Ultra High
Efficiency LED Driver with
32 Dimming Levels
Description
The CAT3647 is a high efficiencye fractional charge pump that can
drive up to three 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 multifractional 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
1wire pulsedimming interface supports 32 linear steps from
fullscale down to zero current.
The device is available in the tiny 16pad TQFN 3 mm x 3 mm
package with a max height of 0.8 mm.
ON Semiconductor’s 1.33x, charge pump switching architecture is
patented.
Features
High Efficiency 1.33x Charge Pump
Charge Pump: 1x, 1.33x, 1.5x, 2x
Drives up to 3 LEDs at 30 mA Each
1wire 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
16pad TQFN Package
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
http://onsemi.com
TQFN16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
LED2
LED3
NC
RSET
1
C2
C2+
C1
C1+
(Top View)
MARKING DIAGRAM
JAAP
AXXX
YWW
JAAP = CAT3647HV3GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
ORDERING INFORMATION
Device
Package Shipping
CAT3647HV3GT2
(Note 1)
TQFN16
2,000/
(PbFree) Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
1. NiPdAu Plated Finish (RoHScompliant).
© Semiconductor Components Industries, LLC, 2014
August, 2014 Rev. 3
1
Publication Order Number:
CAT3647/D

PagesPages 13
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