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參數(shù)資料
| 型號： | CAT4240TD-GT3 |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 6 Watt Boost LED Driver |
| 中文描述： | 6瓦升壓LED驅(qū)動器 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 319K |
| 代理商： | CAT4240TD-GT3 |
CAT4240
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-5026 Rev. B
FEATURES
Switch Current Limit 750mA
Drives High Voltage LED strings (38V)
Up to 94% Efficiency
Low Quiescent Ground Current 0.6mA
1MHz Fixed Frequency Low noise Operation
Soft start “in-rush” current limiting
Shutdown current less than 1
μ
A
Open LED Overvoltage Protection
Automatic Shutdown at 1.9V (UVLO)
Thermal overload protection
Thin SOT23 5-Lead (1mm max height)
APPLICATIONS
GPS Navigation Systems
Portable Media Players
Handheld Devices, Digital Cameras
ORDERING INFORMATION
Part Number
Package
Quantity
per Reel
Package
Marking
CAT4240TD-GT3
TSOT23-5
Green*
3000
TG
* NiPdAu Plated Finish
For Ordering Information details, see page 13.
DESCRIPTION
The CAT4240 is a DC/DC step-up converter that delivers
an accurate constant current ideal for driving LEDs.
Operation at a fixed switching frequency of 1MHz allows
the device to be used with small value external ceramic
capacitors and inductor. LEDs connected in series are
driven with a regulated current set by the external resistor
R1. The CAT4240 high-voltage output stage is perfect for
driving mid-size and large panel displays containing up to
ten white LEDs in series.
LED dimming can be done by using a DC voltage, a logic
signal, or a pulse width modulation (PWM) signal. The
shutdown input pin allows the device to be placed in
power-down mode with “zero” quiescent current.
In addition to thermal protection and overload current
limiting, the device also enters a very low power
operating mode during “Open LED” fault conditions. The
device is housed in a low profile (1mm max height) 5-lead
thin SOT23 package for space critical applications.
Pin Configuration
Typical Application Circuit
5-Lead Thin SOT23
(1mm max height)
VIN
CAT4240
V
L
L1
D1
VOUT
R1
1
R2
300mA
(300mV)
1μF
4.7μF/16V
8V to
16V
VIN
5V
C1
C3
C2
FB
SHDN
GND
47μH
1μF/50V
SW
1k
6 Watt Boost LED Driver
VIN
FB
2
3
1
SHDN
5
4
SW
GND
L1: Sumida CDRH6D28-470
D1: Central CMSH1-40 (rated 40V)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4240TD-GT3 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER BOOST TSOT-23-5 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, BOOST, TSOT-23-5 |
| CAT-42506 | 制造商:Thomas & Betts 功能描述:1/4' YELLOW 6 PCS. PER BAG |
| CAT4254VP2-GT3 | 制造商:Catalyst Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述: |
| CAT431L | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Low-Voltage Adjustable Precision Voltage Reference |
| CAT431LEUK-TE7 | 功能描述:基準(zhǔn)電壓& 基準(zhǔn)電流 1.24V .5% RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Voltage References 拓?fù)浣Y(jié)構(gòu):Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準(zhǔn)確度:0.25 % 平均溫度系數(shù)（典型值）:100 PPM / C 串聯(lián) VREF - 輸入電壓（最大值）: 串聯(lián) VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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