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CAT3644 fiches techniques PDF

ON Semiconductor - 4-Channel Ultra High Efficiency LED Driver

Numéro de référence CAT3644
Description 4-Channel Ultra High Efficiency LED Driver
Fabricant ON Semiconductor 
Logo ON Semiconductor 





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CAT3644 fiche technique
CAT3644
4-Channel Ultra High
Efficiency LED Driver
Description
The CAT3644 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 multifractional charge pump supports a wide range of
input voltages from 2.5 V to 5.5 V.
The EN/DIM logic input functions as a chip enable and a digital
dimming interface for current setting of all LEDs. Six different current
ratios are available via the interface.
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 4 LEDs at 25 mA Each
1wire EZDim LED Current Programming
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
3 mm x 3 mm, 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
© Semiconductor Components Industries, LLC, 2014
August, 2014 Rev. 8
1
http://onsemi.com
TQFN16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
LED2
LED3
LED4
RSET
1
C2
C2+
C1
C1+
(Top View)
MARKING DIAGRAMS
JAAG
AXXX
YWW
JAAH
AXXX
YWW
JAAG = CAT3644HV3T2
JAAH = CAT3644HV3GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
ORDERING INFORMATION
Device
CAT3644HV3T2
(Note 1)
CAT3644HV3GT2
(Note 2)
Package
TQFN16
(PbFree)
TQFN16
(PbFree)
Shipping
2000 /
Tape & Reel
1. MatteTin Plated Finish (RoHScompliant).
2. NiPdAu Plated Finish (RoHScompliant).
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Publication Order Number:
CAT3644/D

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