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Numéro de référence | CAT3644 | ||
Description | 4-Channel Ultra High Efficiency LED Driver | ||
Fabricant | ON Semiconductor | ||
Logo | |||
1 Page
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 multi−fractional 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 16−pad 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
• 1−wire 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, 16−pad TQFN Package
• These Devices are Pb−Free, 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
TQFN−16
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 = CAT3644HV3−T2
JAAH = CAT3644HV3−GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
ORDERING INFORMATION
Device
CAT3644HV3−T2
(Note 1)
CAT3644HV3−GT2
(Note 2)
Package
TQFN−16
(Pb−Free)
TQFN−16
(Pb−Free)
Shipping†
2000 /
Tape & Reel
1. Matte−Tin Plated Finish (RoHS−compliant).
2. NiPdAu Plated Finish (RoHS−compliant).
†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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Pages | Pages 13 | ||
Télécharger | [ CAT3644 ] |
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