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参数资料
| 型号： | NCP3065SOBSTGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP3065SOBSTG |
| 设计资源： | NCP3065 Boost Eval Board BOM NCP3065SOBSTGEVB Gerber Files NCP3065 Boost Eval Board Schematic |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 350mA |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 20V |
| 输入电压： | 12V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP3065 |
| 其它名称： | NCP3065SOBSTGEVBOS |
NCP3065, NCV3065
INTRODUCTION
The NCP3065 is a monolithic power switching regulator
optimized for LED Driver applications. Its flexible
architecture enables the system designer to directly
implement a step ? up or step ? down topology with a
minimum number of external components for driving LEDs.
A representative block diagram is shown in Figure 4.
OPERATING DESCRIPTION
The NCP3065 operates as a fixed oscillator frequency
output voltage ripple gated regulator. In general, this mode
of operation is somewhat analogous to a capacitor charge
pump and does not require dominant pole loop
compensation for converter stability. The typical operating
waveforms are shown in Figure 14. The output voltage
waveform shown is for a step ? down converter with the
ripple and phasing exaggerated for clarity. During initial
converter startup, the feedback comparator senses that the
output voltage level is below nominal. This causes the
output switch to turn on and off at a frequency and duty cycle
controlled by the oscillator, thus pumping up the output filter
capacitor. When the feedback voltage level reaches nominal
comparator value, the output switch cycle is inhibited. When
the load current causes the output voltage to fall below the
nominal value feedback comparator enables switching
immediately. Under these conditions, the output switch
conduction can be enabled for a partial oscillator cycle, a
partial cycle plus a complete cycle, multiple cycles, or a
partial cycle plus multiple cycles.
Oscillator
The oscillator frequency and off ? time of the output switch
are programmed by the value of the timing capacitor C T .
Capacitor C T is charged and discharged by a 1 to 6 ratio
internal current source and sink, generating a positive going
sawtooth waveform at Pin 3. This ratio sets the maximum
t ON /(t ON +t OFF ) of the switching converter as 6/(6+1) or
85.7% (typical). The oscillator peak and valley voltage
difference is 500 mV typically. To calculate the C T capacitor
value for required oscillator frequency, use the equations
found in Figure 22. An online NCP3065 design tool can be
found at www.onsemi.com, which adds in selecting
component values.
Feedback Comparator Output
I PK Comparator Output
1
0
1
0
Timing Capacitor, C T
Output Switch
On
Off
Nominal Output Voltage Level
Output Voltage
Startup
Figure 14. Typical Operating Waveforms
http://onsemi.com
7
Operation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP3066DFSEPGEVB | 功能描述:电源管理IC开发工具 NCP3066 DFN SEPIC DB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP3066DR2G | 功能描述:直流/直流开关调节器 1.5A SW REG FOR LED W/ENABLE RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3066MNTXG | 功能描述:直流/直流开关调节器 1.5A SW REG FOR LED W/ENABLE RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3066PG | 功能描述:直流/直流开关调节器 1.5A SW REG FOR LED W/ENABLE RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3066S3BCKGEVB | 功能描述:电源管理IC开发工具 NCP3066 3A SOIC BUCK DB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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