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参数资料
| 型号： | SP6683UEB |
| 厂商： | Exar Corporation |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP6683 |
| 标准包装： | 1 |
| 系列： | * |
APPLICATION INFORMATION
Configuring the SP6683 as Voltage or
Current Source
The white LED load configuration used by
customers can be discrete white LEDs or a white
LED module. Inside the white LED module,
there may or may not be resistors in series with
the white LEDs. According to the different
application requirements, the SP6683 can be
configured as either a voltage source or a current
source to provide solutions for these different
applications, as shown below. The figure shows
the SP6683 driving discrete white LEDs as a
current source.
Anode
FB
3-wire W-LED module
GND
3-wire white LED module
V OUT
1
V OUT
1
Anode
SP6683
FB
5
SP6683
Rb
Rb
2-wire W-LED module
8
GND
2.2uF
GND
V FB
5
Cathode
Rb
Driving discrete white LEDs as current source
The current in one white LED current is set by
the ratio of the feedback pin voltage (315mV)
and the bias resistor R B . To set the operating
current, R B can be selected by:
R B = V FB
I LED
The current of the remaining white LEDs is set
according to the similarity of the white LEDs.
3-wire white LED modules with internal series
8
Driving 2-wire white LED module as current source
In the figure above, the SP6683 was used to
drive a 2-wire white LED module (without
internal series resistors) as a current source. The
bias resistor R B is selected to regulate the total
current of the white LED module instead of the
current of a single LED as in the figure showing
the 3 wire white LED module.
resistors (as shown in figure below) can also be
driven in this way.
V OUT
1
Anode
R5
SP6683
GND
8
V FB
5
2.2uF
R6
2-wire W-LED
module
Cathode
Driving 2-wire white LED module as voltage source
Date: 3/31/06 RevG
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight
8
? Copyright 2006 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6685 | 制造商:EXAR 制造商全称:EXAR 功能描述:700mA Buck/Boost Charge Pump LED Driver |
| SP6685_06 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:700mA Buck/Boost Charge Pump LED Driver |
| SP6685EB | 功能描述:电源管理IC开发工具 Eval Board for SP6685 Series RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| SP6685ER | 制造商:Exar Corporation 功能描述:LASER DIODE/LED DRIVER, 10 Pin, Plastic, LCC |
| SP6685ER/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:700mA Buck/Boost Charge Pump LED Driver |
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