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UC2875-EP Fiches technique(PDF) 5 Page - Texas Instruments |
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UC2875-EP Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 18 page UC2875EP PHASE SHIFT RESONANT CONTROLLER SGLS233A − FEBRUARY 2004 − REVISED DECEMBER 2008 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics, TA = −25_C to 110_C, VC = VIN = 12 V, RFREQSET = 12 kW, CFREQSET = 330 pF, RSLOPE = 12 kW, CRAMP = 200 pF, CDELAYSET A−B = CDELAYSET C−D = 0.01 mF, IDELAYSET A−B = IDELAYSET C−D = −500 mA, and TA = TJ (unless otherwise stated) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS PWM Comparator Ramp offset voltage TJ = 25_C, See Note 3 1.3 V Zero phase shift voltage See Note 4 0.55 0.9 V PWM phase shift (See Note 1) VE/AOUT > (Ramp Peak + Ramp Offset) 98 99.5 102 % PWM phase shift (See Note 1) VE/AOUT < Zero Phase Shift Voltage 0 0.5 2 % Output Skew (See Note 1) VE/AOUT < 1 V 5 ±20 ns Ramp to output delay See Note 6 65 125 ns Oscillator Initial accuracy TJ = 25_C 0.85 1 1.15 MHz Voltage stability VIN = 11 V to 20 V 0.2 2 % Total variation Line, Temperature 0.80 1.20 MHz Sync pin threshold TJ = 25_C 3.8 V Clock out peak TJ = 25_C 4.3 V Clock out low TJ = 25_C 3.3 V Clock out pulse width RCLOCKSYNC = 3.9 kΩ 30 100 ns Maximum frequency RFREQSET = 5 kΩ 2 MHz Ramp Generator/Slope Compensation Minimum ramp current ISLOPE = 10 µA, VFREQSET = VREF −11 −14 µA Maximum ramp current ISLOPE = 1 mA, VFREQSET = VREF −0.8 −0.95 mA Ramp valley 0 V Ramp peak − clamping level RFREQSET = 100 kΩ 3.8 4.1 V Current Limit Input bias current VCS+ = 3 V 2 5 µA Threshold voltage 2.4 2.5 2.6 V Delay to output 85 150 ns Soft-Start/Reset Delay Charge current VSOFTSTART = 0.5 V −20 −9 −3 µA Discharge current VSOFTSTART = 1 V 120 230 µA Restart threshold 4.3 4.7 V Discharge level 300 mV |
Numéro de pièce similaire - UC2875-EP_15 |
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Description similaire - UC2875-EP_15 |
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