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| 型号： | NCP5604AAGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP5604AAG |
| 产品变化通告： | Product Obsolescence 30/Jun/2011 |
| 设计资源： | NCP5604A EVB BOM NCP5604AAGEVB Gerber Files NCP5604 EVB Schematic NCP5604 Demo Brd BOM |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 100mA |
| 输出及类型： | 4，非隔离 |
| 输出电压： | 4.8 ~ 6 V |
| 特点： | 通-断开关 |
| 输入电压： | 2.85 ~ 5.5 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP5604 |
| 其它名称： | NCP5604AAGEVBOS |
NCP5604A, NCP5604B
and 23 mA when Q1 is ON. The concept can use either a
DC drive or a pulsed mode to dynamically dim the light out
1
VBAT
C2P
of the LED.
A different analog approach, but more complex solution,
can be derived from either a DC or a pulsed voltage
associated with a current mirror built with low cost discrete
devices (see Figure 14). The associated filter (R2/R3/C1)
ENABLE
2
3
EN
IREF
C2N
C3P
provides a continuous voltage to the current mirror, thus a
digitally controlled continuous output current. Generally
speaking, the PWM frequency could be either in the low
C3N
end 20 Hz to 200 Hz band, or above the audio band (25 kHz
and beyond) to make sure the dimming can be adjusted
from zero to 100% without any audible noise. As a matter
of fact, the NCP5604A has been designed to guarantee
200 kHz PWM at the ENABLE pin.
High Out
Q1
4
9
AGND
PGND
VOUT
The current mirror can be largely improved by using an
external operational amplifier to get a very stable and
temperature independent current, but such a solution could
turn out to be too expensive and, generally speaking, the
basic structure given, Figure 13, gives good results since
the current depends mostly upon the quality of resistor R2.
GND
Figure 13. Basic Analog Dimming Control
1
VBAT
C2P
ENABLE
2
3
EN
IREF
C2N
C3P
V = 3.3 V
C3N
PWM
R1
12 k
R2
15 k
BC846BDW
4
9
AGND
PGND
VOUT
GND
GND
GND
Figure 14. Basic Analog PWM Dimming Control
http://onsemi.com
11
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相关代理商/技术参数 |
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|---|---|
| NCP5604AMTR2G | 功能描述:LED照明驱动器 ANA 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 |
| NCP5604B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Efficiency White LED Driver |
| NCP5604BMTR2G | 功能描述:LED照明驱动器 ANA 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 |
| NCP5604D WAF | 制造商:ON Semiconductor 功能描述: |
| NCP5608 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Multiple LED Charge Pump Driver |
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