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TK83854DIMG Dataheets PDF



Part Number TK83854DIMG
Manufacturers TOKO
Logo TOKO
Description HIGH POWER FACTOR PREREGULATOR
Datasheet TK83854DIMG DatasheetTK83854DIMG Datasheet (PDF)

TK83854 HIGH POWER FACTOR PREREGULATOR FEATURES s s s s s s Control Boost PWM to 0.99 Power Factor Limit Line Current Distortion to < 5% Worldwide Operation without Switches Feed-Forward Line Regulation Low Noise Sensitivity Pin Compatible with UC2854, and UC3854 (Licensed Source) FEATURES (CONT.) s s s s s Low Start-Up Supply Current Fixed-Frequency PWM Drive Low-Offset Analog Multiplier/Divider 1 Amp Totem-Pole Gate Driver Precision Voltage Reference DESCRIPTION The TK83854 family of integra.

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TK83854 HIGH POWER FACTOR PREREGULATOR FEATURES s s s s s s Control Boost PWM to 0.99 Power Factor Limit Line Current Distortion to < 5% Worldwide Operation without Switches Feed-Forward Line Regulation Low Noise Sensitivity Pin Compatible with UC2854, and UC3854 (Licensed Source) FEATURES (CONT.) s s s s s Low Start-Up Supply Current Fixed-Frequency PWM Drive Low-Offset Analog Multiplier/Divider 1 Amp Totem-Pole Gate Driver Precision Voltage Reference DESCRIPTION The TK83854 family of integrated circuits provide active power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. These parts implement all the control functions necessary to build a power supply preregulator capable of optimally using available power-line current while minimizing line-current distortion. To do this, the TK83854 contains a voltage amplifier, a precision analog multiplier/ divider, a current amplifier, and a fixed-frequency PWM. In addition, the TK83854 contains a power MOSFET gate driver, 7.5 V reference, line anticipator, load-enable comparator, low supply detector, and overcurrent comparator. The TK83854 family uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion. Unlike peak current-mode control, average current control accurately maintains sinusoidal line current without slope compensation. The TK83854's high reference voltage and high oscillator amplitude minimize noise sensitivity while fast PWM elements permit chopping frequencies above 200 kHz. The TK83854 can be used in systems with line voltages that vary from 75 to 275 V and with line frequencies across the 50 Hz to 400 Hz range. To reduce the burden on the ENA circuitry that supplies power to this device, the TK83854 family features low start-up supply current. These devices are available in 16-pin plastic dual in-line (DIP) and 16-pin surface mount (SOP) packages. TK83854 838 54 GND PKLMT CAOUT ISENSE MULTOUT GTDRV VCC CT SS RSET VSENSE ENA Vref SOP-16 8 3854 IAC VAOUT VRMS DIP-16 BLOCK DIAGRAM VAOUT VCC 16/10 V 7-5 V REF RUN 2.5/2.25 V 7.5 V VSENSE IM = AB C A B X2 C R R S RUN Q 15 V GTDRV MULTOUT CAOUT PKLMT Vref IC POWER VCC ORDERING INFORMATION TK83854 Tape/Reel Code Package Code Extended Temp. Range IAC VRMS SS 14 µA OSC 1 PACKAGE CODE D: DIP-16 M: SOP-16 TEMP. RANGE (OPTIONAL) I: -40 TO +85 C TAPE/REEL CODE TL: Tape Left MG: Magazine ISENSE CT RSET GND January 1999 TOKO, Inc. Page 1 TK83854 ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................... 35 V Power Dissipation TK83854D (Note 1) ..................... 1 W Power Dissipation TK83854M (Note 2) .............. 750 mW GTDRV Current (Continuous) ................................. 0.5 A GTDRV Current (50% Duty Cycle) .......................... 1.5 A Input Voltage (VSENSE, VRMS) .................................... 11 V Input Voltage (ENA, ISENSE, MULTOUT) .........


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