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参数资料
| 型号： | CAT32TDI-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | IC WHITE LED DRIVER TSOT-23-6 |
| 标准包装： | 3,000 |
| 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 V ~ 7 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
CAT32
Operation
The CAT32 device is a high efficiency, constant
frequency, current regulating boost converter.
The device includes a switch and an internally
compensated loop for the regulation of the LED current.
Operation can be best understood by examining the block
diagram. The RSET pin is regulated at 100 mV and the
current through the external resistor will set the regulated
current in the LEDs (from 5 mA to 40 mA) with a
multiplication factor of 225.
Block Diagram
While maintaining LED current regulation, the CAT32
automatically adjusts the LED pin voltage to be as low as
possible. A low LED 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 RSET pin higher than 0.1 V.
V IN
C1
L 1
Over Voltage
Protection
(22 V)
1
SW
1.2 MHz
Oscillator
D 1
C 2
Current
Sense
Amp
+
?
PWM
& Logic
100 mV
?
+
LED
3
I LED
6
5
V IN
SHDN
CAT32
2
GND
I S
4
Current
Control
RSET
225x
I LED = 225 x I S
R SET
Figure 14. CAT32 Block Diagram
http://onsemi.com
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT32TDIT3 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:CMOS White LED Driver |
| CAT32TDI-T3 | 功能描述:LED照明驱动器 2-7V Adj Curr 40mA 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 |
| CAT32TDI-TE7 | 制造商:ON Semiconductor 功能描述:LED DRIVER, BOOST, 4 LED, SERIES - Tape and Reel 制造商:ON Semiconductor 功能描述:IC LED DRIVER WHITE SMD SOT-23-6 |
| CAT32ZD4-GT3 | 功能描述:LED照明驱动器 LED Driver Boost 4 LED series 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 |
| CAT33C101 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:1K BIT SERIAL E2PROM |
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