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UC2842A Datasheet(PDF) 6 Page - Texas Instruments

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Part No. UC2842A
Description  Current Mode PWM Controller
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

UC2842A Datasheet(HTML) 6 Page - Texas Instruments

  UC2842A Datasheet HTML 1Page - Texas Instruments UC2842A Datasheet HTML 2Page - Texas Instruments UC2842A Datasheet HTML 3Page - Texas Instruments UC2842A Datasheet HTML 4Page - Texas Instruments UC2842A Datasheet HTML 5Page - Texas Instruments UC2842A Datasheet HTML 6Page - Texas Instruments UC2842A Datasheet HTML 7Page - Texas Instruments  
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Off-line Flyback Regulator
Slope Compensation
APPLICATIONS DATA (cont.)
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
Power Supply Specifications
1. Input Voltage
95VAC to 130VA
(50 Hz/60Hz)
2. Line Isolation
3750V
3. Switching Frequency
40kHz
4. Efficiency @ Full Load
70%
5. Output Voltage:
A. +5V,
±5%; 1A to 4A load
Ripple voltage: 50mV P-P Max
B. +12V,
±3%; 0.1A to 0.3A load
Ripple voltage: 100mV P-P Max
C. -12V ,
±3%; 0.1A to 0.3A load
Ripple voltage: 100mV P-P Max
A fraction of the oscillator ramp can be resistively
summed with the current sense signal to provide slope
compensation for converters requiring duty cycles over
50%.
Note that capacitor, C, forms a filter with R2 to suppress
the leading edge switch spikes.
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD.
• MERRIMACK, NH 03054
TEL. (603) 424-2410
• FAX (603)424-3460
6


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