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UC3843AL-D08-T Datasheet(PDF) 6 Page - Unisonic Technologies

No. de pieza UC3843AL-D08-T
Descripción Electrónicos  CURRENT MODE PWM CONTROL CIRCUITS
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Fabricante Electrónico  UTC [Unisonic Technologies]
Página de inicio  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3843AL-D08-T Datasheet(HTML) 6 Page - Unisonic Technologies

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UC3842A/3843A
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
6 of 9
www.unisonic.com.tw
QW-R103-002.F
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=1.0V/Rs.
A small RC filter be required to suppress switch transients.
SLOPE COMPENSATION
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.
OSCILLATOR SECTION
Dead time vs. CT(RT>5kΩ)
Timing Resistance vs. Frequency


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