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参数资料
| 型号： | SP6686ER-L |
| 厂商： | Exar Corporation |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR BK/BT CHG/PMP 10DFN |
| 标准包装： | 121 |
| 拓扑： | PWM，降压（降压），升压（升压），切换式电容器（充电泵） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 频率： | 2.4MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 散装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 1016-1528-5 1016-1528-5-ND 1016-1680 SP6686ER-L-ND |
S P 6 6 8 6
4 0 0 m A B u c k / B o o s t C h a r g e P u m p L E D D r i v e r
0.47 μ F fly capacitor are typically
recommended. For the input capacitor, a
larger value of 10 μ F will help reduce input
voltage ripple for applications sensitive to
ripple on the battery voltage. All the
capacitors should be ceramic to obtain low
ESR, which improves bypassing on the input
and output and improves output voltage drive
by reducing output resistance. X5R or X7R
Ceramic capacitors are recommended for most
applications. A selection of recommended
capacitors is included in Table 1. The input and
output capacitors should be located as close to
the V IN and V OUT pins as possible to obtain best
bypassing, and the returns should be
connected directly to the PGND pin or to the
thermal pad ground located under the SP6686.
The fly capacitor should be located as close to
the C1 and C2 pins as possible. The sense
resistor R SENSE is determined by the value
needed in the Torch mode for the desired
output current by the equation:
Next, the R SET resistor can be selected for
Flash mode using the following equation:
1.26
11.2 Ω
For an example of 150mA Torch mode and
400mA Flash mode, the values R SENSE =0.33 Ω ,
V FB =135mV (Flash Mode), and R SET =106k Ω are
calculated. The power obtained in the Flash
mode would be:
133 400 53
The typical 0603 surface mount resistor is
rated at 1/10 Watt continuous power and 1/5
Watt pulsed power, more than enough for this
application. For other applications, the PFLASH
can be calculated from the resistor size
selected. The R SENSE resistor is recommended
to be size 0603 for most applications.
E VALUATION B OARD L AYOUT
Where V FB =50mV in torch mode.
Once the R SENSE resistor has been selected for
Torch mode, the V FB voltage can be selected
for Flash mode using the following equation:
Where I OUT is for Flash Mode
? 2009 Exar Corporation
9/12
Rev. 2.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6686ER-L/TR | 功能描述:LED照明驱动器 400mA Buck/Boost Charge Pump 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 |
| SP6687 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6687_06 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6687EB | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6687ER1-L | 制造商:Exar Corporation 功能描述:CHARGE PUMP LED DRIVER SMD 6687 |
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