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參數(shù)資料
| 型號： | CAT4238 |
| 英文描述： | High Efficiency 10 LED Boost Converter |
| 中文描述： | 高效率的LED升壓轉(zhuǎn)換器10 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 290K |
| 代理商： | CAT4238 |
CAT4238
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 5019 Rev. A
FEATURES
Drives High Voltage LED strings (38V)
Up to 87% Efficiency
Low Quiescent Ground Current 0.6mA
Adjustable Output Current
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
Portable Game Machines
ORDERING INFORMATION
Part Number
Package
Quantity
per Reel
Package
Marking
CAT4238TD-GT3
TSOT23-5
Green*
3000
MU
* NiPdAu Plated Finish
For Ordering Information details, see page 13.
DESCRIPTION
The CAT4238 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. LED currents up to 40mA can be supported over a
wide range of input supply voltages up to 5.5V, making
the device ideal for battery-powered applications. The
CAT4238 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)
High Efficiency 10 LED Boost Converter
VIN
FB
2
3
1
SHDN
5
4
SW
GND
VIN
CAT4238
VIN
L
D
VOUT
R1
15
20mA
(300mV)
4.7μF
C1
0.22μF
C2
FB
SHDN
SW
GND
ON
47μH
OFF
L: Sumida CDC5D23B-470
D: Central CMDSH05-4
C2: Taiyo Yuden UMK212BJ224 (rated 50V)
相關PDF資料 |
PDF描述 |
|---|---|
| CAT4238TD-GT3 | High Efficiency 10 LED Boost Converter |
| CAT5241WI-10 | Quad Digitally Programmable Potentiometers (DPP⑩) with 64 Taps and 2-wire Interface |
| CAT5241 | Quad Digitally Programmable Potentiometers (DPP⑩) with 64 Taps and 2-wire Interface |
| CAT5241JI-00 | Quad Digitally Programmable Potentiometers (DPP⑩) with 64 Taps and 2-wire Interface |
| CAT5241JI-10 | Quad Digitally Programmable Potentiometers (DPP⑩) with 64 Taps and 2-wire Interface |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4238_07 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Efficiency 10 LED Boost Converter |
| CAT4238AEVB | 功能描述:BOARD EVALUATION DPP CAT4238A 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 |
| CAT4238AGEVB | 功能描述:BOARD EVALUATION DPP CAT4238A 制造商:on semiconductor 系列:- 零件狀態(tài):在售 電流 - 輸出/通道:40mA 輸出和類型:1，非隔離 電壓 - 輸出:- 特性:可調(diào)光 電壓 - 輸入:2.8 V ~ 5.5 V 所含物品:板 使用的 IC/零件:CAT4238 標準包裝:1 |
| CAT4238TD-GT3 | 功能描述:LED照明驅(qū)動器 High Voltage Boost 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 |
| CAT4238TD-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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