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參數(shù)資料
| 型號： | CAT37RD4-TE13 |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | CMOS White LED Driver Boost Converter |
| 中文描述： | 的CMOS白光LED驅(qū)動器升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大小： | 168K |
| 代理商： | CAT37RD4-TE13 |
CAT37
6
Doc. No. 5005, Rev. R
OPERATION
The CAT37 device is a high efficiency, constant
frequency, current regulating boost driver for white LEDs.
The device includes a switch and an internally
compensated loop for the regulation of the current in the
LEDs.
Operation can be best understood by examining the
block diagram. The FB pin is regulated at 95 mV and the
current through the external resistor will set the regulated
current in the LEDs at:
I
LED
= 0.095/R1
While maintaining LED current regulation, the CAT37
boost converter automatically adjusts the FB pin voltage
to be as low as possible. A low FB pin voltage ensures
high efficiency.
Current through the internal power switch is continuously
monitored cycle-by-cycle. If the current limit is exceeded,
the switch is immediately turned off, protecting the
device, for the remainder of the cycle.
PWM dimming operation can be achieved by switching
the
SHDN
pin or by pulling the FB pin higher than 95mV.
BLOCK DIAGRAM
Figure 2. CAT37 Block Diagram
VIN
1.2 MHz
Clock
PWM
& Logic
+
-
D1
L1
VIN
C1
2
FB
3
Current
Sense
Amp
SW
1
5
CAT37
Error
Amp
C2
4
SHDN
GND
0.095V
REF
ILED
R1
+
-
Over Voltage
Protection
(22V)
Note: SOT23 Pin Numbers
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT37TDI | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:CMOS White LED Driver Boost Converter |
| CAT37TDI-GT3 | 功能描述:LED照明驅(qū)動器 LED Driver Boost 4 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT37TDI-T2 | 功能描述:IC LED DRVR WHITE BCKLGHT TSOT-5 RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標準包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓撲:PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應商設備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
| CAT37TDI-T3 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:CMOS White LED Driver Boost Converter |
| CAT37TDI-TE7 | 功能描述:LED照明驅(qū)動器 White LED 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
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