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參數(shù)資料
| 型號(hào)： | NCP3063B |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 269K |
| 代理商： | NCP3063B |
NCP3063, NCP3063B, NCV3063
http://onsemi.com
7
INTRODUCTION
The NCP3063 is a monolithic power switching regulator
optimized for dc to dc converter applications. The
combination of its features enables the system designer to
directly implement stepup, stepdown, and voltage
inverting converters with a minimum number of external
components. Potential applications include cost sensitive
consumer products as well as equipment for industrial
markets. A representative block diagram is shown in
Figure 2.
Operating Description
The NCP3063 is a hysteric, dcdc converter that uses a
gated oscillator to regulate output voltage. 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 12. The output voltage
waveform shown is for a stepdown 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 output voltage level reaches nominal,
the output switch next cycle turning on is inhibited. The
feedback comparator will enable the switching immediately
when the load current causes the output voltage to fall below
nominal. Under these conditions, 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. (See AN920/D for more information).
Oscillator
The oscillator frequency and offtime of the output switch
are programmed by the value selected for 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. 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 13. An Excel based design tool
can be found at www.onsemi.com on the NCP3063 product
page.
Figure 12. Typical Operating Waveforms
1
0
Output Switch
1
0
On
Off
Feedback Comparator Output
Nominal Output Voltage Level
Startup
Operation
Output Voltage
Timing Capacitor, C
T
I
PK
Comparator Output
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP3063BDR2G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.5 A DCDC SW REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| NCP3063BDR2G-CUT TAPE | 制造商:ON 功能描述:NCP3063B Series 40 V 1.5 A Step-Up/Down/ Inverting Switching Regulator - SOIC-8 |
| NCP3063BMNTXG | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SWITCHING REGULATOR 1.5A 150kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP3063BPG | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.5 A DCDC SW REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| NCP3063BPG | 制造商:ON Semiconductor 功能描述:Switching Regulator |
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