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UC3842A датащи(PDF) 7 Page - Unisonic Technologies

номер детали UC3842A
подробное описание детали  CURRENT MODE PWM CONTROL CIRCUITS
Download  9 Pages
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производитель  UTC [Unisonic Technologies]
домашняя страница  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3842A датащи(HTML) 7 Page - Unisonic Technologies

  UC3842A_12 Datasheet HTML 1Page - Unisonic Technologies UC3842A_12 Datasheet HTML 2Page - Unisonic Technologies UC3842A_12 Datasheet HTML 3Page - Unisonic Technologies UC3842A_12 Datasheet HTML 4Page - Unisonic Technologies UC3842A_12 Datasheet HTML 5Page - Unisonic Technologies UC3842A_12 Datasheet HTML 6Page - Unisonic Technologies UC3842A_12 Datasheet HTML 7Page - Unisonic Technologies UC3842A_12 Datasheet HTML 8Page - Unisonic Technologies UC3842A_12 Datasheet HTML 9Page - Unisonic Technologies  
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UC3842A/3843A
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
7 of 9
www.unisonic.com.tw
QW-R103-002.G
SHUTDOWN TECHNIQUES
8
3
1kΩ
1
Shutdown
To current
Sense resistor
Shutdown
Shutdown UTC UC3842A can be accomplished by two methods; either raise Pin 3 above 1V or pull Pin 1 below a
voltage two diode drops above ground. Either method caused the output of PWM comparator to be high(refer to
block diagram). The PWM latch is reset dominant so that the output will remain low until the next clock cycle after the
shutdown condition at Pins 1 and/or 3 is removed. In one example, an externally latched shut-down may be
accomplished by adding an SCR which be reset by cycling VCC below the lower UVLO threshold. At this point the
reference turns off allowing the SCR to reset.


Аналогичный номер детали - UC3842A_12

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Аналогичное описание - UC3842A_12

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