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| 型号： | SP7685EB |
| 厂商： | Exar Corporation |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP7665 |
| 标准包装： | 1 |
| 系列： | * |
SP7685
1.2A Buck/Boost Charge Pump LED Driver
FEATURES
■ Output Current up to 1.2A
VIN
1
10
VOUT
■ Up to 94% Efficiency in Torch Mode
■ Adjustable FLASH Mode Current
■ Minimum External Components: No Inductors
■ Automatic Buck/Boost Mode Switchover
■ Wide V IN Range: 2.7V to 5.5V
■ High Frequency Operation: 2.4 MHz
C1
C2
FLASH
EN
2
3
4
5
SP7685
10 Pin DFN
9
8
7
6
PGND
SGND
FB
RSET
■ 50mV Reference for low Loss Sensing
■ I Q < 2 μ A in Shutdown
■ PWM Dimming Control
■ Automatic Soft Start Limits Inrush Current
■ Overvoltage Protection on Output
■ Overcurrent/temperature Protection
■ Low Ripple and EMI
■ Ultra-low Dropout Voltage in Buck Mode
■ 2.6 Second Timeout in Flash Mode
APPLICATIONS
■ White LED Torch/Flash for Cell
Phones, DSCs, and Camcorders
■ White LED Backlighting
■ Generic Lighting/Flash/Strobe
Applications
■ General Purpose High Current Boost
■ Space Saving RoHS Compliant, Lead Free
Package: 10-pin 3mm x 3mm DFN
DESCRIPTION
The SP7685 is a current-regulated charge pump ideal for powering high brightness LEDs for
camera flash applications. The charge pump can be set to regulate two current levels for
FLASH and TORCH modes. The SP7685 automatically switches modes between step-up
and step-down ensuring that LED current does not depend on the forward voltage. A low
current sense reference voltage (50mV) allows the use of small 0603 current sensing
resistors. The SP7685 is offered in 10-pin DFN package.
TYPICAL APPLICATION CIRCUIT
V IN
(3.0 - 4.2V)
O
V IN V OUT
S GND
C IN
10 μ F
C FC
1 μ F
¤
C1 SP7685 P GND
C2
C OUT
10 μ F
1A Flash
200mA Torch
PWF1 WLED
TORCH/FLASH
ENABLE
FLASH
EN
FB
R SET
R SET
80K Ω
R SENSE
0.22 Ω
Date: 6/20/06 Rev T
SP7685, 1.2A Buck/BoostCharge Pump LED Driver
1
? 2006 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP7685ER | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7685ER-L | 功能描述:LED照明驱动器 1.2A Bck/Bst Charge Pump 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 |
| SP7685ER-L/TR | 功能描述:LED照明驱动器 1.2A BUCK/BOOST LED DRVR 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 |
| SP7686 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Constant Current Flash Driver in DFN 2mm x 3mm |
| SP7686A | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Constant Current Flash Driver in DFN 2mm x 3mm |
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