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UC3842 Datasheet(PDF) 3 Page - NXP Semiconductors |
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UC3842 Datasheet(HTML) 3 Page - NXP Semiconductors |
3 / 8 page ![]() Philips Semiconductors Linear Products Product specification UC3842 Current-mode PWM controller August 31, 1994 1102 DC AND AC ELECTRICAL CHARACTERISTICS 0 ≤TJ≤70°C for UC3842; VCC=15V; RT=10kW; CT=3.3nF, unless otherwise specified. SYMBOL PARAMETER TEST CONDITIONS UC3842 UNIT SYMBOL PARAMETER TEST CONDITIONS Min Typ Max UNIT Reference section VOUT Output voltage TJ=25°C, IO=1mA 4.90 5.00 5.10 V Line regulation 12 ≤VIN≤25V 6 20 mV Load regulation 1 ≤IO≤20mA 6 25 mV Temp. stability1 0.2 0.4 mV/ °C Total output variation1 Line, load, temp. 4.82 5.18 V VNOISE Output noise voltage1 10Hz ≤f≤10kHz, TJ=25°C 50 µV Long-term stability1 TJ=125°C, 1000 Hrs. 5 25 mV Output short-circuit TJ=25 -30 -100 -130 mA Output short-circuit -55<TJ≤0°C -30 -100 -180 mA Oscillator section Initial accuracy TJ=25°C 47 52 57 kHz Voltage stability 12 ≤VCC≤25V 0.2 1 % Temp. stability1 TMIN≤TJ≤TMAX 5 % Amplitude VPIN 4 peak-to-peak 1.7 V Error amp section Input voltage V Pin 1=2.5V 2.42 2.50 2.58 V IBIAS Input bias current -0.3 -2 µA AVOL 2 ≤VO≤4V 65 90 dB Unity gain bandwidth1 TJ=25°C 0.7 1 MHz Unity gain bandwidth TMIN<TJ<TMAX 0.5 MHz PSRR Power supply rejection ratio 12 ≤VCC≤25V 60 70 dB ISINK Output sink current VPIN 2=2.7V, VPIN 1=1.1V 2 6 mA ISOURCE Output source current VPIN 2=2.3V, VPIN 1=5V -0.5 -0.8 mA VOUT High VPIN 2=2.3V, RL=15k to ground 5 6 V VOUT Low VPIN 2=2.7V, RL=15k to Pin 8 0.7 1.1 V Current sense section Gain 2, 3 2.85 3 3.15 V/V Maximum input signal2 VPIN 1=5V 0.9 1 1.1 V PSRR Power supply rejection ratio2 12 ≤VCC≤25V 70 dB IBIAS Input bias current -2 -10 µA Delay to output1 150 300 ns |
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