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UCC2894PWG4 Datasheet(PDF) 4 Page - Texas Instruments |
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UCC2894PWG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 41 page UCC2891, UCC2892 UCC2893, UCC2894 SLUS542F − OCTOBER 2003 − REVISED JULY 2009 4 www.ti.com ELECTRICAL CHARACTERISTICS VDD = 12 V(1), 1-µF capacitor from VDD to GND, 0.01-µF capacitor from VREF to GND, RON = ROFF = 75 kΩ, RDEL = 10 kΩ, RSLOPE = 50 kΩ, −40 °C ≤ TA = TJ ≤ 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Voltage Reference VREF Reference voltage TJ = 25°C 4.85 5.00 5.15 V VREF Reference voltage 0 A < IREF < 5 mA, over temperature 4.75 5.00 5.25 V ISC Short circuit current REF = 0 V, TJ = 25°C −20 −11 −8 mA INTERNAL SLOPE COMPENSATION m Slope(3) FB = High -10% R CS R SLOPE +10% OSCILLATOR fOSC Oscillator frequency TJ = 25°C 237 250 263 kHz Total variation −40 °C < TJ 125°C; 8.5 V < 14.5 V 225 270 kHz Total variation −40 °C < TJ 125°C; 8.5 V < 14.5 V 225 270 kHz VP_P Oscillator amplitude (peak-to-peak) 2 V SYNCHRONIZATION VSYNCH SYNC theshold voltage 1.6 2.3 3.0 V tDEL SYNC-to-output delay 50 ns PWM Maximum duty cycle 66% 70% 74% Minimum duty cycle 0% PWM offset CS = 0 V 0.43 0.50 0.61 V CURRENT SENSE VLVL Current sense level shift voltage 0.40 0.50 0.60 VERR(max) Maximum voltage error (clamped) 4.8 5.0 5.2 VCS Current sense threshold UCC2891 UCC2893 0.71 0.75 0.79 V VCS Current sense threshold UCC2892 UCC2894 1.23 1.27 1.31 (1) Set VDD above the start threshold before setting at 12 V. (2) Does not include current of the external oscillator network. |
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