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参数资料
| 型号： | SP6685ER-L |
| 厂商： | Exar Corporation |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR BK/BST CH/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： | 1016-1527-5 SP6685ER-L-ND |
S P 6 6 8 5
7 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
R ESISTOR S ELECTION
The sense resistor R SENSE is determined by the
value needed in the Torch mode for the
range of typical resistor values and sizes are
shown in table 2.
desired output current by the equation:
R SENSE = V FB /I OUT
Where V FB = 50mV (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:
V FB = I OUT * R SENSE (Flash Mode)
Where I OUT is for Flash Mode.
Next, the R SET resistor can be selected for
Flash mode using the following equation:
Part Ref.
R SET
R SET
R SET
R SET
R SET
R SET
R SET
R SET
R SET
R SET
R SENSE
R SENSE
R SENSE
R SENSE
R SENSE
Value
68K ?
75K ?
82K ?
91K ?
100K ?
110K ?
120K ?
130K ?
140K ?
150K ?
0.22 ?
0.27 ?
0.33 ?
0.39 ?
0.47 ?
Tolerance
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
Size
0402
0402
0402
0402
0402
0402
0402
0402
0402
0402
0603
0603
0603
0603
0603
R SET = (1.26V/ V FB )*11.2K Ω (Flash Mode)
For an example of 200mA Torch mode and
600mA Flash mode, the values R SENSE =
0.25 Ω , VFB = 150mV (Flash Mode), and R SET
= 94K Ω are calculated. The power obtained in
the Flash mode would be:
P FLASH = V FB *I OUT = 150mV*600mA = 90mW.
The typical 0603 surface mount resistor is
rated 1/10 Watt continuous power and 1/5
Watt pulsed power, more than enough for this
application. For other applications, the P FLASH
power can be calculated and resistor size
selected. The R SENSE resistor is recommended
to be size 0603 for most applications. The
Table 2: Resistor Value and Sizes
E VALUATION BOARD CIRCUIT LAYOUT
? 2009 Exar Corporation
12/14
Rev. 2.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6685ER-L/TR | 功能描述:电荷泵 700mA For Camera Flash RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| SP6685ERTR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Charge Pump LED Driver For Camera Flash |
| SP6686 | 制造商:EXAR 制造商全称:EXAR 功能描述:400mA Buck/Boost Charge Pump LED Driver |
| SP6686EB | 功能描述:LED 照明开发工具 Eval Board for SP6686 Series RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| SP6686ER | 制造商:Exar Corporation 功能描述:Driver, Other |
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