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CAT3644
4-Channel Ultra High
Efficiency Quad-Mode ) LED
Driver
Description
The CAT3644 is a high efficiency Quad ? Mode ? 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
http://onsemi.com
TQFN ? 16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
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 Quad ? Mode ? 1.33x charge pump switching
architecture is patented.
LED2
LED3
LED4
RSET
1
C2 ?
C2+
C1 ?
C1+
Features
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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 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
(Top View)
MARKING DIAGRAMS
JAAG JAAH
AXXX AXXX
YWW 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)
2,000/
CAT3644HV3 ? GT2
TQFN ? 16
Applications
? LCD Display Backlight
? Cellular Phones
? Digital Still Cameras
? Handheld Devices
ORDERING INFORMATION
Device Package Shipping ?
CAT3644HV3 ? T2 TQFN ? 16
(Note 1) (Pb ? Free)
Tape & Reel
(Note 2) (Pb ? Free)
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.
? Semiconductor Components Industries, LLC, 2012
January, 2012 ? Rev. 7
1
Publication Order Number:
CAT3644/D
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相关代理商/技术参数
CAT3644HV3G-T2 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述:
CAT3644HV3-T2 功能描述:LED照明驱动器 4 CHANNEL QUAD-MODE RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3647 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:3-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver with 32 Dimming Levels
CAT3647HV3-GT2 功能描述:LED照明驱动器 Ultra Hi Eff Quad LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3648 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:4-Channel Ultra High Efficiency Quad-Mode LED Driver with 32 Dimming Levels
CAT3648HV3-GT2 功能描述:LED照明驱动器 Ultra Hi Eff Quad LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3649 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:6-Channel Quad-Mode LED Driver with 32 Dimming Levels & PWM
CAT3649AGEVB 功能描述:电源管理IC开发工具 EVB FOR CAT3649 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V