參數(shù)資料
型號(hào)： CAT4237TD
英文描述： High Voltage CMOS Boost White LED Driver
中文描述： 高電壓的CMOS升壓白光LED驅(qū)動(dòng)器
文件頁(yè)數(shù)： 11/13頁(yè)
文件大小： 533K
代理商： CAT4237TD
CAT4237
2005 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11 of 13
Doc. No. 5013, Rev. A
BOARD LAYOUT
The CAT4237 is a high-frequency switching
regulator. The traces that carry the high-
frequency switching current have to be
carefully layout 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 CAT4237 internal
switch is closed. On Figure 4 is shown the
current loop, when the CAT4237 switch is
Figure 3. Closed-switch current loop
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 CAT4237 allows for direct connection of
the capacitors to ground. The resistor R1
must be connected directly to the GND pin of
the CAT4237 and not shared with the
switching current loops and any other
components.
closed
Figure 4. Open-switch current loop
open
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CAT4237TD-26771T3 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述:
CAT4237TD-GT3 功能描述:LED照明驅(qū)動(dòng)器 LED Driver,Boost 8 LED,series 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
CAT4237TD-GT3 制造商:ON Semiconductor 功能描述:IC, WHITE LED DRIVER, BOOST, TSOT-23-5
CAT4237TD-T3 功能描述:LED照明驅(qū)動(dòng)器 High Voltage Boost White LED 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
CAT4237TS 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver
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