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參數(shù)資料
| 型號： | CAT4201 |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | 350mA High Efficiency Step Down LED Driver |
| 中文描述： | 350mA的高效率LED驅(qū)動(dòng)下步 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 330K |
| 代理商： | CAT4201 |
CAT4201
Doc. No. MD-5025 Rev. B
12
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Open LED Behavior
If the LEDs are not connected, the CAT4201 stops
switching and draws very little current.
At power-up with no load connected, the capacitor C2
is charged-up by the CAT4201. As soon as the bottom
side of the capacitor (C2-) reaches 0 volt, as shown
on Figure 9, the CAT4201 stops switching and
remains in the idle mode only drawing about 0.4mA
current from the supply.
Figure 9. Open LED mode
Board Layout
In order to minimize EMI and switching noise, the
Schottky diode, the inductor and the output capacitor
C2 should all be located close to the driver IC. The
input capacitor C1 should be located close to the
VBAT pin and the Schottky diode cathode. The
CAT4201 ground pin should be connected directly to
the ground plane on the PCB. A recommended PCB
layout with component location is shown on Figure 10.
The LEDs are connected by two wires tied to both
sides of the output capacitor C2. The LEDs can be
located away from the driver if needed.
Figure 10. Recommended PCB Layout
In order to further reduce the ripple on the supply rail,
an optional Pi style filter (C-L-C) can be used. A 10μH
inductor rated to the maximum supply current can be
used.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4201AEVB | 功能描述:BOARD EVALUATION DPP CAT4201A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動(dòng)器 系列:* 標(biāo)準(zhǔn)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(diǎn):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(guān)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 |
| CAT4201AGEVB | 功能描述:LED 照明開發(fā)工具 EVAL BOARD FOR LED DRIVER RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| CAT4201TD | 制造商:ON Semiconductor 功能描述:IC LED DRIVER HI EFFICIENCY |
| CAT4201TD-GT3 | 功能描述:LED照明驅(qū)動(dòng)器 350mA Hi-Efficiency Step-Down 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 |
| CAT4201TD-GT3 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER BUCK TSOT-23-5 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, BUCK, TSOT-23-5 |
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