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參數資料
| 型號： | PWM5032-001-1S |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CDSO24 |
| 封裝： | 0.600 X 0.300 INCH, 0.130 INCH HEIGHT, HERMETIC SEALED, CERAMIC PACKAGE-24 |
| 文件頁數： | 8/19頁 |
| 文件大小： | 224K |
| 代理商： | PWM5032-001-1S |
16
SCD5031 Rev P 4/22/10
Aeroflex Plainview
5V TO 1.8V BUCK CONVERTER
A second application is a secondary side, non-isolated buck converter. The circuit takes a high voltage (5V in this case)
and steps down to a lower voltage (5V to 1.8V in this example, although as pointed out above, these values are
completely adjustable with proper component selection). If the output voltage is less than 2.5V the auxiliary amplifier
can be used to provide the gain necessary to get VFB back up to 2.5V.
FIGURE 11 – Buck Converter
The circuit switches M1 twice per cycle, chopping the 5VDC input into a fixed frequency pulse train whose DC average
is the desired output voltage. The LC filter then simply smoothes this pulse train to produce a clean DC output. The
control loop regulates against operating point perturbations (temperature, line, load) by adjusting M1's duty cycle. The
circuit is operated in the voltage mode since switch current is not referenced to circuit ground. Alternatively, a current
transformer may be used to properly reference the ISENSE signal to permit current mode control. An inverter is needed in
the output path to properly drive the P-channel MOSFET. For low current applications (less than -50mA output current),
it may be possible to use the PWM's output drive stage as the switching elements and eliminate M1 and D1 altogether.
RSET
CSET
INPUT 5V
Rcomp
1V/1.8V/2.5V/3.3V
M1
OUTPUT
RSOFT
CSOFT
Ccomp
0.1F
RSET
CSET
VEE DRVN
VFB
COMP
50%
ISENSE
Out A
VCC
DRVP
SOFT
VREF
D1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| PWM505 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| PWM-50-59 | 制造商:Brady Corporation 功能描述:REFILL PAGES - LEGEND: 50-59 |
| PWM510 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| PWM-6 | 制造商:Brady Corporation 功能描述: |
| PWM-60-12 | 功能描述:O/P +12V5A 制造商:mean well usa inc. 系列:PWM-60 零件狀態(tài):在售 類型:恒定電壓 拓撲:AC DC 轉換器 輸出數:1 電壓 - 輸入（最小值）:90VAC 電壓 - 輸入（最大值）:305VAC 電壓 - 輸出:12V 電流 - 輸出（最大值）:5A 功率（W）:60W 電壓 - 隔離:3750V 調光:模擬，PWM 特性:OCP，OTP，OVP，SCP 等級:IP67 工作溫度:-40°C ~ 85°C 效率:86% 端子類型:導線引線 大小/尺寸:5.91" 長 x 2.09" 寬 x 1.38" 高（150.0mm x 53.0mm x 35.0mm） 安裝類型:底座安裝 認可:CB，CCC，CE，cURus，ENEC 標準包裝:1 |
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