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| 型号： | CAT4139TD-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT TSOT-5 |
| 特色产品： | CAT4139 |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 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 ~ 1.3MHz |
| 电源电压： | 2.8 V ~ 5.5 V |
| 输出电压： | 22V |
| 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 |
| 产品目录页面： | 805 (CN2011-ZH PDF) |
| 其它名称： | CAT4139TD-GT3DKR |
CAT4139
V OUT
Open LED Protection
In the event of an “Open LED” fault condition, the
CAT4139 will continue to boost the output voltage with
maximum power until the output voltage reaches
approximately 24 V. Once the output exceeds this level, the
V IN
L
22 m H
Schottky 40 V
(Central CMSH05 ? 4)
D
internal circuitry immediately places the device into a very
low power mode where the total input power is limited to
about 6 mW (about 1.6 mA input current with a 3.6 V
supply). The SW pin clamps at a voltage below its maximum
C1
4.7 m F
VIN
SW
C2
1 m F
rating of 40 V. There is no need to use an external zener diode
CAT4139
between VOUT and the FB pin. A 35 V rated C2 capacitor
is required to prevent any overvoltage damage in the open
LED condition.
OFF ON
SHDN
GND
FB
R1
15 W
Figure 18. Open LED Protection Circuit
Figure 19. Open LED Disconnect and Reconnect
2.5
35
Figure 20. Open LED Disconnect
30
2.0
25
1.5
20
1.0
3.0
3.5
4.0
4.5
5.0
5.5
15
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 21. Open LED Supply Current
http://onsemi.com
9
INPUT VOLTAGE (V)
Figure 22. Open LED Output Voltage
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PDF描述 |
|---|---|
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| CAT4240TD-GT3 | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| CAT93C56XI | IC EEPROM 2KBIT 2MHZ 8SOIC |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4139TD-GT3 | 制造商:ON Semiconductor 功能描述:DRIVER LED 0.75A 1MHZ 22V 制造商:ON Semiconductor 功能描述:IC WHITE LED DRIVER BOOST TSOT-23-5 |
| CAT4139TD-GT3 | 制造商:ON Semiconductor 功能描述:IC WHITE LED DRIVER BOOST TSOT-23-5 |
| CAT-41871 | 制造商:Thomas & Betts 功能描述:Cable Accessories Cable Tie Box |
| CAT-41872 | 制造商:Thomas & Betts 功能描述:Cable Accessories Cable Tie Box |
| CAT4201 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:350mA High Efficiency Step Down LED Driver |
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