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UC2867 Datasheet

Part Number UC2867
Manufacturers Unitrode
Logo Unitrode
Description Resonant-Mode Power Supply Controllers
Datasheet UC2867 DatasheetUC2867 Datasheet (PDF)

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zer.

  UC2867   UC2867






Part Number UC2868
Manufacturers Unitrode
Logo Unitrode
Description Resonant-Mode Power Supply Controllers
Datasheet UC2867 DatasheetUC2868 Datasheet (PDF)

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zer.

  UC2867   UC2867







Part Number UC2866
Manufacturers Unitrode
Logo Unitrode
Description Resonant-Mode Power Supply Controllers
Datasheet UC2867 DatasheetUC2866 Datasheet (PDF)

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zer.

  UC2867   UC2867







Part Number UC2865
Manufacturers Unitrode
Logo Unitrode
Description Resonant-Mode Power Supply Controllers
Datasheet UC2867 DatasheetUC2865 Datasheet (PDF)

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zer.

  UC2867   UC2867







Part Number UC2864
Manufacturers Unitrode
Logo Unitrode
Description Resonant-Mode Power Supply Controllers
Datasheet UC2867 DatasheetUC2864 Datasheet (PDF)

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zer.

  UC2867   UC2867







Resonant-Mode Power Supply Controllers

www.DataSheet4U.com UC1861-1868 UC2861-2868 UC3861-3868 Resonant-Mode Power Supply Controllers FEATURES DESCRIPTION • Controls Zero Current Switched (ZCS) The UC1861-1868 family of ICs is optimized for the control of Zero Curor Zero Voltage Switched (ZVS) rent Switched and Zero Voltage Switched quasi-resonant converters. DifQuasi-Resonant Converters ferences between members of this device family result from the various combinations of UVLO thresholds and output options. Additionally, the • Zero-Crossing Terminated One-Shot one-shot pulse steering logic is configured to program either on-time for Timer ZCS systems (UC1865-1868), or off-time for ZVS applications (UC1861• Precision 1%, Soft-Started 5V 1864). Reference The primary control blocks implemented include an error amplifier to com• Programmable Restart Delay pensate the overall system loop and to drive a voltage controlled oscillator Following Fault (VCO), featuring programmable minimum and maximum frequencies. Triggered by the VCO, the one-shot generates pulses of a programmed maxi• Voltage-Controlled Oscillator (VCO) mum width, which can be modulated by the Zero Detection comparator. with Programmable Minimum and Maximum Frequencies from 10kHz to This circuit facilitates “true” zero current or voltage switching over various line, load, and temperature changes, and is also able to accommodate the 1MHz resonant components' initial tolerances. • Low Start-Up Current (150µA typical) Under-Voltage Lockout is incorporated.


2007-01-05 : 2SB0819    2SB0873    54F190    74F190    54F191    74F191    54F192    74F192    54F193    74F193   


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