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| 型号： | NCP5006EVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/24页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5006 |
| 设计资源： | NCP5006 Demo Board BOM NCP5006EVB Gerber Files NCP5006 Demo Board Schematic |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 15mA |
| 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： | NCP5006 |
| 其它名称： | NCP5006EVBOS |
NCP5006
TYPICAL APPLICATIONS CIRCUITS
Standard Feedback
The standard feedback provides a constant current to the
LED, independently of the V bat supply and number of LED
V bat
U1
associated in series. Figure 28 depicts a typical application
to supply 13 mA to the load.
V bat
C1
4
EN
V bat
5
4.7 m F
L1
22 m H
GND
GND
2
3
GND
FB
V out 1
D1
MBR0530
NCP5006
C2
1.0 m F
GND
R1
D6
D5
D4
D3
D2
GND
15 W
LWT67C LWT67C LWT67C LWT67C LWT67C
Figure 28. Basic DC Current Mode Operation with Analog Feedback
PWM Operation
The analog feedback Pin 3 provides a way to dim the
LED by means of an external PWM signal as depicted in
Figure 29. By optimizing the internal high impedance
presented by the FB pin, one can set up a simple R/C
network to accommodate such a dimming function. Two
modes of operation can be considered:
? Pulsed mode, with no filtering
? Averaged mode with filtering capacitor
Although the pulsed mode will provide a good dimming
start and stop the converter, yielding high transients . These
transients might generate spikes difficult to filter out in the
rest of the application, a situation not recommended. The
output current depends upon the duty cycle of the signal
presented to the node Pin 3: this is very similar to the digital
control discussed in Figure 31.
The average mode yields a noise free operation since the
converter operates continuously, together with a very good
dimming function. The cost is an extra resistor and one
extra capacitor, both being low cost parts.
function, from a human eye standpoint, it will continuously
http://onsemi.com
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| NCP5006SNT1G | 功能描述:LED照明驱动器 White LED Backlight Boost 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 |
| NCP5007 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Compact Backlight LED Boost Driver |
| NCP5007/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Compact Backlight LED Boost Driver |
| NCP5007_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Compact Backlight LED Boost Driver |
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