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参数资料
| 型号： | NCP5005GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/23页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5005G |
| 设计资源： | NCP5005 EVB BOM NCP5005GEVB Gerber Files NCP5005 EVB Schematic |
| 标准包装： | 1 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 22V |
| 输入电压： | 3.6V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP5005 |
| 其它名称： | NCP5005GEVBOS |
NCP5005
Output Current Range Set?Up
The current regulation is achieved by means of an external sense resistor connected in series with the LED string.
V bat
L1
22 m H
V out
1
D1
FB
3
Q1
CONTROLLER
GND
Figure 8. Output Current Feedback
R1
x W
GND
The current flowing through the LED creates a voltage
drop across the sense resistor R1. The voltage drop is
constantly monitored internally, and maximum peak
current allowed in the inductor is set accordingly in order
to keep constant this voltage drop (and thus the current
flowing through the LED). For example, should one need
a 10 mA output current, the sense resistor should be sized
according to the following equation:
A standard 5% tolerance resistor, 22 W SMD device,
yields 9.09 mA, good enough to fulfill the back light
demand. The typical application schematic diagram is
provided in Figure 9.
R1 + Feedback Threshold + 200 mV + 20 W
Iout 10 mA
(eq. 9)
U1
V bat
Pulse
4
EN
V bat
5
C1
4.7 m F
L1
22 m H
GND
GND
2
3
GND
FB
V out
1
D1
MBR0530
C2
NCP5005
1.0 m F
GND
R1
D6
D5
D4
D3
D2
GND
22 W
LWT67C LWT67C LWT67C LWT67C LWT67C
Figure 9. Basic Schematic Diagram
http://onsemi.com
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5005SNT1G | 功能描述:LED照明驱动器 ANA WHITE 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 |
| NCP5006 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators |
| NCP5006_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Compact Backlight LED Boost Driver |
| NCP5006EVB | 功能描述:LED 照明开发工具 ANA WHITE LED DRIVER EVB 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: |
| NCP5006SNT1 | 功能描述:LED照明驱动器 White LED Backlight 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 |
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