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參數(shù)資料
| 型號： | CAT3644HV3-T2 |
| 英文描述： | 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver |
| 中文描述： | 4通道超高效率的Quad - Mode商標(biāo)LED驅(qū)動器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 294K |
| 代理商： | CAT3644HV3-T2 |
CAT3644
2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 5023, Rev. B
4-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 4 LEDs at 25mA 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
3mm x 3mm, 16-lead TQFN package
APPLICATION
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part
Number
Package
Package
Marking
CAT3644HV3-T2 TQFN-16 3x3mm
(1)
JAAG
Note:
(1) Matte-Tin Plated Finish (RoHS-compliant)
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 tradi–
tional 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 2.5V 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 16-lead TQFN
3mm x 3mm package with a max height of 0.8mm.
The 1.33x charge pump with two fly capacitors is a
patent pending architecture exclusive to Catalyst
Semiconductor.
For Ordering Information details, see page 13.
PIN CONFIGURATION
L
G
N
N
16 15 14 13
LED2
1
12 C2-
LED3
2
11 C2+
LED4
3
10 C1-
RSET
4
9
C1+
5 6 7 8
E
V
N
V
GND
V
IN
2.4V
to
5.5V
20mA
3.8k
LED1
LED2
LED3
LED4
RSET
EN/DIM
CAT3644
V
IN
V
OUT
V
OUT
White LEDs
1μF
1μF
CIN
C1-
C1+
C2-
C2+
1μF
1μF
C
OUT
1-Wire
EZDim
TM
Programming
TYPICAL APPLICATION CIRCUIT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3647 | 制造商:CATALYST 制造商全稱: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照明驅(qū)動器 Ultra Hi Eff Quad LED Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3648 | 制造商:ONSEMI 制造商全稱: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照明驅(qū)動器 Ultra Hi Eff Quad LED Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3649 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:6-Channel Quad-Mode LED Driver with 32 Dimming Levels & PWM |
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