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参数资料
| 型号： | CAT37TDI-T2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.6MHz |
| 电源电压： | 2.5 V ~ 7 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT37TDI-T2DKR CAT37TDI-TE7DKR CAT37TDI-TE7DKR-ND |
CAT37
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:
R1
I LED + 0.095
Block Diagram
L1
VIN
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 95 mV.
D1
C1
VIN
5
1
SW
C2
Error
4
SHDN
Over Voltage
Protection
(22 V)
+
1.2 MHz
Oscillator
PWM
& Logic
90 k W
?
+
Amp
6 k W
0.095 V
REF
FB
3
R1
I LED
?
CAT37
GND
Current
Sense
Amp
2
Figure 13. CAT37 Block Diagram
http://onsemi.com
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT37TDI-T3 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:CMOS White LED Driver Boost Converter |
| CAT37TDI-TE7 | 功能描述:LED照明驱动器 White LED Boost RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| CAT-38-PP | 功能描述:INSTALL TOOL ORANGE FOR SHR SER RoHS:是 类别:工具 >> 螺线形绕线，伸缩套管 系列:- 标准包装:1 系列:Slit-N-Wrap® |
| CAT-38-PP-BU | 功能描述:INSTALL TOOL ORANGE FOR SHR SER RoHS:是 类别:工具 >> 螺线形绕线，伸缩套管 系列:- 标准包装:1 系列:Slit-N-Wrap® |
| CAT4002A | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Constant Current LED Driver with 32 Dimming Levels and Rset |
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