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参数资料
| 型号： | SP7121EK-L |
| 厂商： | Exar Corporation |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR BACKLIGHT SOT23-6 |
| 标准包装： | 100 |
| 拓扑： | 高端，线性（LDO），PWM |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 颜色 |
| 电源电压： | 2.7V ~ 5.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 散装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 1016-1763 |
S P 7 1 2 1
2 - C h a n n e l A d j u s t a b l e L o w D r o p o u t H i g h S i d e L i n e a r
L E D D r i v e r
T HERMAL C ONSIDERATIONS
Above example:
The SP7121 does not have over temperature
1
60
0.06
protection. Special care needs to be taken to
ensure that the driver’s junction temperature
stays below 125°C. The thermal resistance of
the package is 190°C per Watt. Under normal
operation conditions with about 30mA of
current per LED and a voltage drop across the
part of 1V, the part will still only dissipate 0.06
Watts, giving a temperature rise of only
11.4°C.
Example of thermal calculation:
Where P is the total power dissipation, V D is
the voltage drop across the SP7121, I OUT is the
total output current.
Where P is the total power dissipation, θ JA is
the thermal resistance of the package per
Watt.
APPLICATION SCHEMATICS
0.06 190 11.4°
The device will be able to operate up to 85°C
under these conditions.
BOARD LAYOUT AND GROUNDING
Although the SP7121 does not require an input
capacitor for normal operation, a 1nF capacitor
can be used to obtain better overall circuit
performance. To obtain the best performance
from the SP7121, a printed circuit board with
ground plane is required. High quality, low
series resistance ceramic 1nF bypass
capacitors should be used at the Vcc and GND
pins (pins 1 and 2). This capacitor must be
located as close to the pins as possible. The
traces connecting the pins and the capacitor
must be kept short and should be made as
wide as possible.
? 2010 Exar Corporation
8/10
Rev. 2.0.0
相关PDF资料 |
PDF描述 |
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| SPB2 | PANEL SWING KIT |
| SPIKECUBE | SURGE SUPPRESSR 1OUT DIRECT PLUG |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP7121EK-L/TR | 功能描述:LED照明驱动器 COMMON CATHODE 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 |
| SP7121EK-LTR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:2-Channel Adjustable Low Dropout High Side Linear LED Driver |
| SP7122 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7122AEB | 功能描述:LED照明驱动器 Common Cathode Linear LED Driver 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 |
| SP7122AEK-L | 功能描述:LED照明驱动器 Common Cathode Linear LED Driver 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 |
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