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UC3843A 数据表(PDF) 4 Page - Unisonic Technologies

部件名 UC3843A
功能描述  CURRENT MODE PWM CONTROL CIRCUITS
Download  7 Pages
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制造商  UTC [Unisonic Technologies]
网页  http://www.utc-ic.com
标志 UTC - Unisonic Technologies

UC3843A 数据表(HTML) 4 Page - Unisonic Technologies

  UC3843A Datasheet HTML 1Page - Unisonic Technologies UC3843A Datasheet HTML 2Page - Unisonic Technologies UC3843A Datasheet HTML 3Page - Unisonic Technologies UC3843A Datasheet HTML 4Page - Unisonic Technologies UC3843A Datasheet HTML 5Page - Unisonic Technologies UC3843A Datasheet HTML 6Page - Unisonic Technologies UC3843A Datasheet HTML 7Page - Unisonic Technologies  
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UTCUC3842A/3843A LINEARINTEGRATEDCIRCUIT
UTC UNISONIC TECHNOLOGIES CO. LTD
4
QW-R103-002,A
ERROR AMPLIFIER CONFIGURATION
2
1
0.5mA
2.5V
Zf
Zi
Error amplifier can source or sink up to 0.5mA
CURRENT SENSE CIRCUIT
5
3
1
2R
R1V
C
Rs
R
Is
Error
Amplifier
Current Sense
Comparator
Peak current (Is) determined by the formula:
Ismax=10V/Rs.
A small RC filter be required to suppress switch transients.
SLOPE COMPENSATION
8
4
3
Isense
R1
R2
Rsense
C
RT
CT
A fraction of the oscillator ramp can be resistively summed with the current sense signal to provide slope
compensation for converts requiring duty cycles over 50%.Note that capacitor C, forms a filter with R2 to suppress
the leading edge switch spikes.


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