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| 型号： | SP6699EB |
| 厂商： | Exar Corporation |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP6699 |
| 标准包装： | 1 |
| 系列： | * |
S P 6 6 9 9
2 7 V S t e p U p W h i t e L E D D r i v e r
October 2011
GENERAL DESCRIPTION
The SP6699 is an inductor-based DC/DC
converter designed to drive up to five white
LEDs in series for LCD modules and keypad
backlighting functions.
Only one feedback resistor is needed to
control the LED current and obtain the desired
brightness. A 1.0MHz constant frequency PWM
control scheme is used, enabling the usage of
small external components. A typical
application needs a 1mm tall inductor and a
0.22 μ F output capacitor. Additionally, the
boost circuit Schottky diode is integrated,
further reducing the overall foot print.
A logic controlled enable pin allows this device
to be placed in a low current consumption
mode of a few microamps. Furthermore, the
SP6699 is equipped with an over voltage
output protection circuit which clamps the
output voltage to 27 volts when any LED fails
or in other abnormal conditions.
The SP6699 is offered in a smal lead free,
RoHS compliant 6-pin SOT23 package.
Rev. 2.1.0
APPLICATIONS
? LCD Modules
? Keypad Backlighting
? Digital Cameras
? GPS Receivers
? Portable Media Players
FEATURES
? High Output Voltage: Up to 27V
? Drives 2 to 5 LEDs @ 20mA
? High Efficiency up to 84%
? Integrated Schottky Diode
? Fast 1.0MHz Switching Frequency
? 200mV Feedback Voltage
? PWM Dimming Capability up to 1KHz
? Over Output Voltage Protection
? Internal Soft Start Circuit
? Small SOT23-6 Package Sub feature
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6699 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6699EK-L | 制造商:Exar Corporation 功能描述:IC CONVERTER STEP UP WHITE LED |
| SP6699EK-L/TR | 功能描述:DC/DC 开关控制器 SET UP WHITE LED CONVERTER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| SP-66A | 制造商:SUPERWORLD 制造商全称:Superworld Electronics 功能描述:Power Transformers - Bracket UL Type |
| SP-66-B | 制造商:Triad Magnetics 功能描述:SP-66 Series 300 Hz to 100 kHz Triad High Reliability Audio Transformer |
| SP-66E | 制造商:SUPERWORLD 制造商全称:Superworld Electronics 功能描述:Power Transformers - Bracket TUV Type |
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