uc3842bn1 ON Semiconductor, uc3842bn1 Datasheet
uc3842bn1
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uc3842bn1 Summary of contents
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The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off–Line and dc–to–dc converter applications offering the designer a cost–effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV MAXIMUM RATINGS Rating Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec) Total Power Supply and Zener Current Output Current, Source or Sink (Note 1) Output Energy (Capacitive Load per Cycle) Current ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV ELECTRICAL CHARACTERISTICS T is the operating ambient temperature range that applies [Note 5], unless otherwise noted.) A Characteristics ERROR AMPLIFIER SECTION Voltage Feedback Input ( Input Bias Current (V = 5.0 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV ELECTRICAL CHARACTERISTICS T is the operating ambient temperature range that applies [Note 9], unless otherwise noted.) A Characteristics PWM SECTION Duty Cycle Maximum (UC284XB, UC384XB) Maximum (UC384XBV) Minimum TOTAL DEVICE Power Supply Current Startup (V ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV µ Figure 6. Error Amp Small Signal Transient Response Figure 8. Error Amp Open Loop Gain and Phase versus Frequency Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Figure 12. Reference Load Regulation Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä µ Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Pin 8–Pin 14–Pin Function 1 1 Compensation 2 3 Voltage Feedback 3 5 Current Sense Gnd 6 10 Output ref 8 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV The UC3842B, UC3843B series are high performance, fixed frequency, current mode controllers. They are specifically designed for Off–Line and dc–to–dc converter applications offering the designer a cost–effective solution with minimal external components. A representative block ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Figure 18. Representative Block Diagram Figure 19. Timing Diagram http://onsemi.com 9 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Undervoltage Lockout Two undervoltage lockout comparators have been incorporated to guarantee that the IC is fully functional before the output stage is enabled. The positive power supply terminal (V ) and the reference output (V ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV ∆ ∆ Figure 20. Continuous Current Waveforms + + ) ) Figure 22. External Duty Cycle Clamp and Multi–Unit Synchronization Figure 21. External Clock Synchronization ) Figure 23. Adjustable ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV µ Figure 24. Soft–Start Circuit V Pin 5 [ Figure 26. Current Sensing Power MOSFET [ ) + * * Figure 25. Adjustable Buffered Reduction of Clamp Level with Soft–Start ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Figure 28. MOSFET Parasitic Oscillations + Figure 30. Isolated MOSFET Drive http://onsemi.com Figure 29. Bipolar Transistor Drive * Figure 31. Latched Shutdown 13 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Figure 32. Error Amplifier Compensation Figure 33. Slope Compensation http://onsemi.com 14 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Ω Figure 34 Off–Line Flyback Regulator Test Conditions Line Regulation: 5 130 Vac Load Regulation: 5 115 Vac 1.0 ...
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... UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV Device UC384XBD UC384XBDR2 UC384XBD1 UC384XBD1R2 UC384XBN UC3842BN1 UC284XBD UC2843BDR2 UC284XBD1 UC284XBD1R2 UC284XBN UC3843BVD UC384XBVDR2 UC384XBVD1 UC384XBVD1R2 UC3843BVN NCV3843BVDR2 X indicates either define specific device part numbers. ORDERING INFORMATION Operating Temperature Range Package SO–14 SO–14 SO–8 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV MARKING DIAGRAMS PDIP–8 N SUFFIX CASE 626 8 8 UC384xBN UC3843BVN FAWL YYWW YYWW 1 1 SO–8 D1 SUFFIX CASE 751 8 8 384xB 384xB ALYW ALYWV 1 1 SO–14 D SUFFIX CASE 751A 14 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV –B– F –A– NOTE 2 C –T– –X– –Y– –Z– PACKAGE DIMENSIONS PDIP–8 N SUFFIX CASE 626–05 ISSUE SO–8 ...
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV –A– –B– G –T– PACKAGE DIMENSIONS SO–14 D SUFFIX CASE 751A–03 ISSUE http://onsemi.com ...
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... Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800–282–9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031 Phone: 81–3–5740–2700 Email: r14525@onsemi ...