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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 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大小： | 533K |
| 代理商： | CAT4237TD |
CAT4237
2005 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
3 of 13
Doc. No. 5013, Rev. A
PIN DESCRIPTION
VIN
is the supply input for the internal logic
The device is compatible with supply voltages
down to 2.8V and up to 5.5V. It is
recommended that a small bypass ceramic
capacitor (4.7uF) be placed between the VIN
and GND pins near the device. If the supply
voltage drops below 1.9V, the device stops
switching.
SHDN*
is the shutdown logic input. When the
pin is tied to a voltage lower than 0.4V, the
device is in shutdown mode, drawing nearly
zero current. When the pin is connected to a
voltage higher than 1.5V, the device is
enabled.
GND
is the ground reference pin. This pin
should be connected directly to the ground
place on the PCB.
Pin #
1
2
3
4
5
BLOCK DIAGRAM
SW
pin is connected to the drain of the internal
CMOS power switch of the boost converter. The
inductor and the Schottky diode anode should be
connected to the SW pin. Traces going to the SW
pin should be as short as possible with minimum
loop area. An over-voltage detection circuit is
connected to the SW pin. When the voltage
reaches 35V, the device enters a low power
operating mode preventing the SW voltage from
exceeding the maximum rating.
FB
feedback pin is regulated at 0.3V. A resistor
connected between the FB pin and ground sets
the LED current according to the formula:
I
LED
= 0.3V/R1
The lower LED cathode is connected to the FB pin.
Name
SW
GND
FB
SHDN*
VIN
Function
Switch pin. This is the drain of the internal power switch.
Ground pin. Connect the pin to the ground plane.
Feedback pin. Connect to the last LED cathode.
Shutdown pin (Logic Low). Set high to enable the driver.
Power Supply input.
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| CAT4237TS | High Voltage CMOS Boost White LED Driver |
| CAT4240 | 6 Watt Boost LED Driver |
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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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