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UC2844N Arkusz danych(PDF) 8 Page - Texas Instruments |
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UC2844N Arkusz danych(HTML) 8 Page - Texas Instruments |
8 / 28 page www.ti.com OFFLINE FLYBACK REGULATOR R1 5 Ω 1 W 117 VAC VARO VM 68 C1 250 µF 250 V R2 56 k Ω 2 W R12 4.7 k Ω 2 W C9 3300 pF 600 V NP D4 1N3613 D2 1N3612 D3 1N3612 NC R3 20 k Ω R4 4.7 k Ω C4 47 µF 25 V R9 68 Ω 3 W C3 22 µF C2 100 µF 25 V 7 2 1 8 4 5 3 6 UC3844 R5 150 k Ω C14 100 pF R6 10 k Ω C5 0.01 µF C6 0.0022 µF USD1120 R7 22 Ω R8 1 k Ω C7 470 pF R13 20 k Ω R10 0.55 Ω 1 W Q1 UFN833 T1 D6 U9D946 L1 N5 C10 4700 µF 10 V C11 4700 µF 10 V +6 V COM +12 V ±12 V COM −12 V D7 UF81002 N12 N12 C12 2200 µF 16 V C13 2200 µF 16 V D8 UES1002 C8 680 pF 600 V D8 1N3613 R11 2.7 k Ω 2 W Power Supply Specifications SLOPE COMPENSATION 8 4 3 VREF RT / CT ISENSE UC1842/3 0.1 mF RT CT R1 R2 C ISENSE RSENSE UC1842/3/4/5 UC2842/3/4/5 UC3842/3/4/5 SLUS223C – APRIL 1997 – REVISED JUNE 2007 1. Input Voltages a. 5VAC to 130VA (50 Hz/60 Hz) 2. Line Isolation: 3750 V 3. Switchng Frequency: 40 kHz 4. Efficiency at Full Load 70% 5. Output Voltage: a. +5 V, ±5%; 1A to 4A load Ripple voltage: 50 mV P-P Max b. +12 V, ±3%; 0.1A to 0.3A load Ripple voltage: 100 mV P-P Max c. –12 V, ±3%; 0.1A to 0.3A load Ripple voltage: 100 mV 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%. 8 Submit Documentation Feedback |
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