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UC1524A Scheda tecnica(PDF) 3 Page - Texas Instruments |
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UC1524A Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 8 page 3 UC1524A UC2524A UC3524A PARAMETER TEST CONDITIONS UC1524A / UC2524A UC3524A UNITS MIN TYP MAX MIN TYP MAX Oscillator Section (Unless otherwise specified, RT = 2700 Ω, CT = 0.01 mfd) Initial Accuracy TJ = 25°C 414345394347 kHz Over Operating Range 40.2 45.9 38.2 47.9 kHz Temperature Stability* Over Operating Temperature Range 1 2 1 2 % Minimum Frequency RT = 150k Ω, CT = 0.1mfd 140 120 Hz Maximum Frequency RT = 2.0k Ω, CT = 470pF 500 500 kHz Output Amplitude* 3 3.5 3 3.5 V Output Pulse Width* 0.29 0.5 1.0 0.3 0.5 1.0 µs Ramp Peak 3.3 3.5 3.7 3.3 3.5 3.7 V Ramp Valley TJ = 25°C 0.7 0.8 0.9 0.7 0.8 0.9 V Ramp Valley T.C. -1.0 -1.0 mV/°C Error Amplifier Section (Unless otherwise specified, VCM = 2.5V) Input Offset Voltage 0.5 5 2 10 mV Input Bias Current 1 5 1 10 µA Input Offset Current .05 1 0.5 1 µA Common Mode Rejection Ratio VCM = 1.5 to 5.5V 70 80 70 80 dB Power Supply Rejection Ratio VIN = 10 to 40V 70 80 70 80 dB Output Swing (Note 1) 5.0 0.5 5.0 0.5 V Open Loop Voltage Gain ∆VO= 1 to 4V, RL ≥ 10MΩ 72 80 64 80 dB Gain-Bandwidth* TJ = 25°C, AV = 0dB 1 3 1 3 MHz DC Transconductance*§ TJ = 25°C, 30k Ω≤ RL ≤ 1MΩ 1.7 2.3 1.7 2.3 mS P.W.M. Comparator (RT = 2k Ω, CT = 0.01mfd) Minimum Duty Cycle VCOMP = 0.5V 0 0 % Maximum Duty Cycle VCOMP = 3.8V 45 45 % Current Limit Amplifier (Unless otherwise specified, Pin 5 = 0V) Input Offset Voltage TJ = 25°C, E/A Set for Maximum Output 190 200 210 180 200 220 mV Over Operating Temperature Range 180 220 170 230 mV Input Bias Current -1 -10 -1 -10 µA Common Mode Rejection Ratio V(pin 5) = -0.3V to + 5.5V 50 60 50 60 dB Power Supply Rejection Ratio VIN = 10 to 40V 50 60 50 60 dB Output Swing (Note 1) Minimum Total Range 5.0 0.5 5.0 0.5 V Open-Loop Voltage Gain ∆VO = 1 to 4V, RL ≥ 10MΩ 70 80 70 80 dB Delay Time* Pin 4 to Pin 9, ∆VIN = 300mV 300 300 ns Output Section (Each Output) Collector Emitter Voltage IC = 100 µA 6080 6080 V Collector Leakage Current VCE = 50V .1 20 .1 20 µA ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = -55°C to +125°C for the UC1524A, -40° to +85°C for the UC2524A, and 0°C to + 70°C for the UC3524A; VIN = VC = 20V, TA =TJ. * These parameters are ensured by design but not 100% tested in production. § DC transconductance (gM) relates to DC open-loop voltage gain according to the following equation: AV =gMRL where RL is the resistance from pin 9 to the common mode voltage. The minimum gM specification is used to calculate minimum AV when the error amplifier output is loaded. Note 1: Min Limit applies to output high level, max limit applies to output low level. |
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