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부품번호 AND8034 기능
기능 MC44608 SMPS Featuring Very Low Standby Power Consumption and Wide Range Output Voltage
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AND8034 데이터시트, 핀배열, 회로
AND8034/D
MC44608 SMPS Featuring
Very Low Standby Power
Consumption and Wide
Range Output Voltage
Prepared by: Jan Grulich
ON Semiconductor Central Lab
Roznov, CZ
http://onsemi.com
APPLICATION NOTE
As it is well known, according to power saving
regulations, we need to obtain a very low power
consumption during standby condition for all equipment
continuously powered on the mains. For “not saving”
version of power supply, the standby power consumption is
around 9.0 W (for 100 W power output). When using the
MC44608 GreenLinePower supply controller, we obtain
1.3 W in standby mode. The result is absolutely
phenomenal, but still, for some special applications, the
power reduction is not enough. In this case the only
possibility to obtain a lower consumption in standby is to use
a separate low output power supply (< 1.0 W) for powering
only the microprocessor and switch off the rest of the
application. The MC44608 is basically not designed for that
use. However this is achievable by adding a few more
components to the typical application schematic. In this case
we can reach a standby power consumption as low as
200 mW.
© Semiconductor Components Industries, LLC, 2000
October, 2000 – Rev. 0
1
Publication Order Number:
AND8034/D
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AND8034 pdf, 반도체, 판매, 대치품
AND8034/D
Figure 4. Zoomed Rising Edge of Figure 3
Trace 1: Voltage at cathode of TL431CLP
Trace 2: Output voltage
Trace 3: Control signal for standby
Figure 5. Output Voltage Regulation
Trace 2: Output voltage
Trace 3: Control signal for voltage regulation
Figure 6. Minimal Period of Regulation
Trace 2: Output voltage
Trace 3: Control signal for voltage regulation
Figure 7. Primary Side Waveforms
Trace 1: Voltage at gate of power switch
Trace 2: Drain current of power switch
Trace 3: Drain voltage of power switch
Figure 8. Switching Waveforms
Trace 1: Voltage at pin 10 of transformer
Trace 2: Voltage at pin 3 of transformer
Figure 9. Primary Side Waveform
Trace 2: Detailed drain voltage of power switch
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AND8034 전자부품, 판매, 대치품
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AND8034/D
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