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参数资料
| 型号： | FAN5331SX_Q |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT SOT23-5 |
| 标准包装： | 3,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 频率： | 1.15MHz ~ 1.85MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 20V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
While the feedback loop tightly regulates V OUT , the negative out-
LED Current vs Input Voltage
(String Connected to FB Pin)
put voltage (-V OUT ) can supply a light load with a negative volt-
age. Nevertheless, the negative voltage depends on the
changes of the load current in both -V OUT and +V OUT , as shown
in the graph below.
20.2
20.1
20.0
19.9
Negative Output Voltage vs Load Current
-18
-15V/Unloaded
-16
19.8
-15V/10mA Load
19.7
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-14
Input Voltage (V)
The feedback loop tightly regulates the current in the branch
connected to FB pin, while the current in the other branch
-12
depends on the sum of the LED’s forward voltages, V OUT and
the ballast resistor. The input and the output ripple is less than
3mV RMS , for load currents up to 40mA.
-10
0
10 20 30 40 50
Load Current On Positive Output Side (mA)
A Zener diode (V Z = 22V) connected between V OUT and GND
can prevent the FAN5331 from being damaged by over-voltage,
if the load is accidently disconnected during operation.
2. Dual Boost Converter
A negative voltage can be provided by adding an external
charge pump (C1, C2, D2, and D3).
C1
BAT54S D2
-V OUT
0.1 μ F
D3
C2
4.7 μ F
I OUT = 10mA
V IN
2.7V to 5.5V
C IN
4.7 μ F
L
10μ H
BAT54
D1
V OUT
C OUT I OUT = 50mA
4.7 μ F
5
V IN
SW
1
R1
C F
120pF
FB
3
R2
ON
OFF
4
SHDN
GND
2
Figure 7. Dual (±) Boost Converter
FAN5331 Rev. 1.0.1
8
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN5332_BBC3086B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5332A | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch |
| FAN5332ASX | 功能描述:直流/直流开关转换器 1.6MHz BOOST REGULATOR RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| FAN5332ASX_NL | 功能描述:LED照明驱动器 1.6MHz Boost regulator 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 |
| FAN5333A | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:High Efficiency, High Current Serial LED Driver with 30V Integrated Switch |
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