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參數(shù)資料
| 型號： | CAT4240 |
| 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)： | 11/14頁 |
| 文件大?。?/td> | 319K |
| 代理商： | CAT4240 |
CAT4240
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. MD-5026 Rev. B
BOARD LAYOUT
The CAT4240 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 CAT4240 internal switch
is closed. On Figure 4 is shown the current loop, when
the CAT4240 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 CAT4240 allows for direct connection
of the capacitors to ground. The resistor R1 must be
connected directly to the GND pin of the CAT4240
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
VIN
CAT4240
V
IN
L
D
V
OUT
R1
C
1
FB
Switch
Closed
SHDN
SW
GND
C
2
VIN
CAT4240
V
IN
L
D
V
OUT
R1
C
1
FB
Switch
Open
SHDN
SW
GND
C
2
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相關(guān)代理商/技術(shù)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(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: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 |
| 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(fēng)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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