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參數(shù)資料
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)
相關PDF資料 |
PDF描述 |
|---|---|
| CAT4240TD-GT3 | 6 Watt Boost LED Driver |
| CAT507BP | 3.3V 32K/64K x 16/18 Dual-Port Static RAM |
| CAT504J | 8-Bit Digital-to-Analog Converter |
| CAT504JI | 8-Bit Digital-to-Analog Converter |
| CAT504P | 16K x 16/18 Dual-Port Static RAM |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4240_0711 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240AEVB | 功能描述:BOARD EVALUATION DPP CAT4240A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動器 系列:* 標準包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調(diào)光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關產(chǎn)品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| CAT4240AGEVB | 制造商:ON Semiconductor 功能描述:EVAL BD FOR LED DRIVER - Bulk 制造商:ON Semiconductor 功能描述:BOARD EVAL FOR CAT4240 |
| CAT4240TD-GT3 | 功能描述:LED照明驅(qū)動器 High Voltage Boost 2 Watt 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 |
| 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 |
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