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UCC35702D Datasheet(PDF) 3 Page - Texas Instruments |
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UCC35702D Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 24 page  3 UCC15701/2 UCC25701/2 UCC35701/2 ELECTRICAL CHARACTERISTICS:Unless otherwise specified, VDD = 11V, RT = 60.4k, CT = 330pF, CREF =CVDD = 0.1 m F, VFF = 2.0V, and no load on the outputs. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Line Sense Vth High Line Comparator 3.9 4 4.1 V Vth Low Line Comparator 0.5 0.6 0.7 V Input Bias Current –100 100 nA Oscillator Section Frequency VFF = 0.8V to 3.2V 90 100 110 kHz Frequency VFF = 0.6V to 3.4V (Note 1) 90 100 110 kHz SYNC VIH 2V SYNC VIL 0.8 V SYNC Input Current VSYNC = 2.0V 3 10 mA RT Voltage VFF = 0.4V 0.5 0.6 0.7 V VFF = 0.8V 0.75 0.8 0.85 V VFF = 2.0V 1.95 2.0 2.05 V VFF = 3.2V 3.15 3.2 3.25 V VFF = 3.6V 3.3 3.4 3.5 V CT Peak Voltage VFF = 0.8V (Note 1) 0.8 V VFF = 3.2V (Note 1) 3.2 V CT Valley Voltage (Note 1) 0 V Soft Start/Shutdown/Duty Cycle Control Section ISS Charging Current 10 18 30 mA ISS Discharging Current 300 500 750 mA Saturation VDD = 11V, IC Off 25 100 mV Fault Counter Section Threshold Voltage VFF = 0.8V to 3.2V 3.8 4 4.2 V Saturation Voltage VFF = 0.8V to 3.2V 100 mV Count Charging Current 10 18 30 mA Current Limit Section Input Bias Current –100 0 100 nA Current Limit Threshold 180 200 220 mV Shutdown Threshold 500 600 700 mV Pulse Width Modulator Section FB Pin Input Impedance VFB = 3V 30 50 100 k W Minimum Duty Cycle VFB <= 1V 0 % Maximum Duty Cycle VFB >= 4.5V, VSCLAMP >= 2.0V 95 99 100 % PWM Gain VFF = 0.8V 35 50 70 %/V Volt Second Clamp Section Maximum Duty Cycle VFF = 0.8V, VSCLAMP = 0.6V 69 74 79 % Minimum Duty Cycle VFF = 3.2V, VSCLAMP = 0.6V 17 19 21 % Output Section VOH IOUT = –100mA, (VDD –VOUT) 0.4 1 V VOL IOUT = 100mA 0.4 1 V Rise Time CLOAD = 1000pF 20 100 ns Fall Time CLOAD = 1000pF 20 100 ns Note 1: Ensured by design. Not 100% tested in production. |
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