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ISL6740AIVZA Datasheet(PDF) 6 Page - Intersil Corporation |
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ISL6740AIVZA Datasheet(HTML) 6 Page - Intersil Corporation |
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6 / 14 page  ISL6740A 6 FN9195.3 February 9, 2012 SC Setpoint Accuracy -10 - % PULSE WIDTH MODULATOR VERROR Input Impedance 400 -- k Ω Minimum Duty Cycle VERROR < CT Valley Voltage - - 0 % Maximum Duty Cycle VERROR > 4.75V, VUV/FF = 2.5V (Note 9) RTD = 5.11kΩ, RTC = 25.5kΩ, CT = 220pF -83- % -99- % VERROR to PWM Comparator Input Gain - 0.4 - V/V CT to PWM Comparator Input Gain -0.4 - V/V SS to PWM Comparator Input Gain -0.5 - V/V OSCILLATOR Frequency Accuracy TA = +25°C (Note 10) 333 351 369 kHz Frequency Variation with VDD TA = +105°C, |(F20V - F9V)/F9V|, UV/FF = 2.00V - 0.1 0.4 % TA = +25°C, |(F20V - F9V)/F9V|, UV/FF = 2.00V - 0.1 0.3 TA = -40°C, |(F20V - F9V)/F9V|, UV/FF = 2.00V - 0.2 0.7 Frequency Variation with VUV/FF TA = +25°C, |(F4.25V - F2.00V)/F2.00V| % VDD = 9V - 1.2 3 % VDD = 20V - 1.2 3 % Temperature Stability VUV/FF = 2.0V, VDD = 9V - 0.5 1.5 % Charge Current Gain 1.88 2.0 2.12 µA/µA Discharge Current Gain 45 55 65 µA/µA CT Valley Voltage Static operation 0.75 0.80 0.85 V CT Peak Voltage Static operation VUV/FF = 2.00V 2.30 2.40 2.50 V VUV/FF = 4.25V 4.10 4.20 4.30 V RTD, RTC Voltage RLOAD = 0Ω VUV/FF = 2.00V - 1.60 - V VUV/FF = 4.25V - 3.40 - V SYNCHRONIZATION Input High Threshold (VIH), Minimum 4.0 -- V Input Low Threshold (VIL), Maximum -- 0.8 V Input Impedance -4.5 - k Ω Input Frequency Range Free Running - 1.67 x Free Running Hz Input Pulse Width 100 -- ns High Level Output Voltage (VOH) ILOAD = -1mA - 4.5 - V Low Level Output Voltage (VOL) ILOAD = 10µA - - 100 mV SYNC Output Current VOH > 2.0V -10 -- mA SYNC Output Pulse Duration (Minimum) 250 - 532 ns SYNC Advance SYNC rising edge to GATE falling edge, COUTA/B = CSYNC = 100pF -5- ns Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” on page 2 and Typical Application Schematics on page 3 and page 4. 9V < VDD < 20 V, RTD = 51.1kΩ, RTC = 10kΩ, CT = 470pF, TA = -40°C to 105°C, Typical values are at TA = 25°C. Boldface limits apply over the operating temperature range, -40°C to +105°C. (Continued) PARAMETER TEST CONDITIONS MIN (Note 7) TYP MAX (Note 7) UNITS |
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