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UC1526 Scheda tecnica(PDF) 3 Page - Texas Instruments |
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UC1526 Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 13 page ELECTRICAL CHARACTERISTICS: PARAMETER TEST CONDITIONS UC1526 / UC2526 UC3526 UNITS MIN TYP MAX MIN TYP MAX Oscillator Section (Note 5) Initial Accuracy TJ = + 25°C ±3 ±8 ±3 ±8% Voltage Stability +VIN = 8 to 35V 0.5 1 0.5 1 % Temperature Stability Over Operating TJ 710 3 5 % Minimum Frequency RT = 150k Ω Ω, CT = 20µµF1 1 Hz Maximum Frequency RT = 2k Ω Ω, CT = 1.0nF 400 400 kHz Sawtooth Peak Voltage +VIN = 35V 3.0 3.5 3.0 3.5 V Sawtooth Valley Voltage +VIN = 8V 0.5 1.0 0.5 1.0 V Error Amplifier Section (Note 6) Input Offset Voltage RS ≤≤ 2kΩ Ω 25 2 10 mV Input Bias Current -350 -1000 -350 -2000 nA Input Offset Current 35 100 35 200 nA DC Open Loop Gain RL ≥ 10MΩ Ω 64 72 60 72 dB HIGH Output Voltage VPIN1-VPIN2 ≥≥ 150mV, ISOURCE = 100 µµA 3.6 4.2 3.6 4.2 V LOW Output Voltage VPIN2-VPIN1 ≥≥ 150mV, ISINK = 100µµA 0.2 0.4 0.2 0.4 V Common Mode Rejection Rs ≤ 12kΩ 70 94 70 94 dB Supply Voltage Rejection +VIN = 12 to 18V 66 80 66 80 dB PWM Comparator (Note 5) Minimum Duty Cycle VCOMPENSATION = +0.4V 0 0 % Maximum Duty Cycle VCOMPENSATION = +3.6V 45 49 45 49 % Digital Ports (SYNC, SHUTDOWN, and RESET) HIGH Output Voltage ISOURCE =40 µµA 2.4 4.0 2.4 4.0 V LOW Output Voltage ISINK = 3.6mA 0.2 0.4 0.2 0.4 V HIGH Input Current VIH = +2.4V -125 -200 -125 -200 µA LOW Input Current VIL = +0.4V -225 -360 -225 -360 µA Current LImit Comparator (Note 7) Sense Voltage RS ≤≤ 50Ω Ω 90 100 110 80 100 120 mV Input Bias Current -3 -10 -3 -10 µA Soft-Start Section Error Clamp Voltage RESET = +0.4V 0.1 0.4 0.1 0.4 V Cs Charging Current RESET =+2.4V 50 100 150 50 100 150 µA Output Drivers (Each Output) (Note 8) HIGH Output Voltage ISOURCE = 20mA 12.5 13.5 12.5 13.5 V ISOURCE = 100mA 12 13 12 13 V LOW Output Voltage ISINK = 20mA 0.2 0.3 0.2 0.3 V ISINK = 100mA 1.2 2.0 1.2 2.0 V Collector Leakage VC = 40V 50 150 50 150 µA Rise Time CL = 1000pF 0.3 0.6 0.3 0.6 µs Fall Time CL = 1000pF 0.1 0.2 0.1 0.2 µs Power Consumption (Note 9) Standby Current SHUTDOWN ____________ = +0.4V 18 30 18 30 mA +VIN = 15V, and over operating ambient temperature, unless otherwise specified, TA = TJ. UC1526 UC2526 UC3526 Note 4: IL = 0mA. Note 5: FOSC = 40kHz (RT = 4.12k Ω ± 1%, CT = 0.1µF ± 1%, RD = 0 Ω) Note 6: VCM = 0 to +5.2V Note 8: VC = +15V Note 9: +VIN = +35V, RT = 4.12k Ω 3 |
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