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| 型號(hào)： | 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(yè)數(shù)： | 11/14頁(yè) |
| 文件大小： | 290K |
| 代理商： | CAT4238 |
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CAT4238
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. 5019 Rev. A
BOARD LAYOUT
The CAT4238 is a high-frequency switching regulator.
The traces that carry the high-frequency switching
current have to be carefully laid out on the board in
order to minimize EMI, ripple and noise in general.
The thicker lines on Figure 3 show the switching
current path. All these traces have to be short and
wide enough to minimize the parasitic inductance and
resistance. The loop shown on Figure 3 corresponds
to the current path when the CAT4238 internal switch
is closed. On Figure 4 is shown the current loop, when
the CAT4238 switch is open. Both loop areas should
be as small as possible.
Capacitor C1 has to be placed as close as possible to
the VIN pin and GND. The capacitor C2 has to be
connected separately to the top LED anode. A ground
plane under the CAT4238 allows for direct connection
of the capacitors to ground. The resistor R1 must be
connected directly to the GND pin of the CAT4238
and not shared with the switching current loops and
any other components.
Figure 3. Closed-switch Current Loop
Figure 4. Open-switch Current Loop
Figure 5. Recommended PCB Layout
相關(guān)PDF資料 |
PDF描述 |
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| 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(guān)代理商/技術(shù)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(kāi)發(fā)系統(tǒng) >> 評(píng)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 |
| 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(biāo)準(zhǔn)包裝:1 |
| CAT4238TD-GT3 | 功能描述:LED照明驅(qū)動(dòng)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(fēng)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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