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參數資料
| 型號： | CAT3643HV3-T2 |
| 英文描述： | 3-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| 中文描述： | 3通道超高效率的Quad - Mode商標LED驅動器 |
| 文件頁數： | 1/17頁 |
| 文件大小： | 321K |
| 代理商： | CAT3643HV3-T2 |
CAT3643
2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 5022, Rev. B
3-Channel Ultra High Efficiency Quad-Mode
LED Driver
FEATURES
High efficiency 1.33x charge pump
Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
Drives up to 3 LEDs at 32mA 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
Tiny 12-lead XQFN, 12-lead TDFN and 16-lead
TQFN packages
APPLICATION
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part
Number
CAT3643HV2-T2
CAT3643HV3-T2
CAT3643HL1-T2 XQFN-12 2.5 x 2.5mm
(1)
Package
Package
Marking
HABF
JAAE
LB
TDFN-12 3 x 3mm
(1)
TQFN-16 3 x 3mm
(1)
Notes:
(1) Matte-Tin Plated Finish (RoHS-compliant)
(2) Quantity per reel is 2000
For Ordering Information details, see page 16.
DESCRIPTION
The CAT3643 is a high efficiency quad-mode
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 multi-fractional
charge pump supports a wide range of input voltages
from 2.4V to 5.5V.
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 12-lead XQFN 2.5 x
2.5mm with max height of 0.4mm or in 16-lead TQFN
or 12-lead TDFN 3mm x 3mm package with a max
height of 0.8mm.
The 1.33x charge pump architecture with two fly
capacitors is patent pending.
TYPICAL APPLICATION CIRCUIT
GND
V
IN
2.4V
to
5.5V
20mA
3.8k
LED1
LED2
LED3
RSET
EN/DIM
CAT3643
V
IN
V
OUT
V
OUT
White LEDs
1μF
1μF
C
IN
C1-
C1+
C2-
C2+
1μF
1μF
C
OUT
1-Wire
EZDim
TM
Programming
相關PDF資料 |
PDF描述 |
|---|---|
| CAT3644 | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| CAT3644HV3-T2 | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| CAT4016 | 16-Channel Constant Current LED Driver |
| CAT4016HV6-T2 | 16-Channel Constant Current LED Driver |
| CAT4016VSR-T2 | 16-Channel Constant Current LED Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CAT3644 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver |
| CAT3644_0710 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver |
| CAT3644HV3 | 制造商:ON Semiconductor 功能描述:IC 4-LED DRIVER QUAD HI EFFICIENCY |
| CAT3644HV3G | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT3644HV3-GT2 | 功能描述:LED照明驅動器 LED Driver,Quad mode,4 ch RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
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