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UC2842A Datasheet(PDF) 6 Page - Texas Instruments |
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UC2842A Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 7 page 
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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