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UC3842AN Fiches technique(PDF) 2 Page - ON Semiconductor |
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UC3842AN Fiches technique(HTML) 2 Page - ON Semiconductor |
2 / 14 page UC3842A, 43A UC2842A, 43A 2 MOTOROLA ANALOG IC DEVICE DATA MAXIMUM RATINGS Rating Symbol Value Unit Total Power Supply and Zener Current (ICC + IZ) 30 mA Output Current, Source or Sink (Note 1) IO 1.0 A Output Energy (Capacitive Load per Cycle) W 5.0 µJ Current Sense and Voltage Feedback Inputs Vin – 0.3 to + 5.5 V Error Amp Output Sink Current IO 10 mA Power Dissipation and Thermal Characteristics D Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air N Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air PD R θJA PD R θJA 862 145 1.25 100 mW °C/W W °C/W Operating Junction Temperature TJ + 150 °C Operating Ambient Temperature UC3842A, UC3843A UC2842A, UC2843A TA 0 to + 70 – 25 to + 85 °C Storage Temperature Range Tstg – 65 to + 150 °C ELECTRICAL CHARACTERISTICS (VCC = 15 V, [Note 2], RT = 10 k, CT = 3.3 nF, TA = Tlow to Thigh [Note 3], unless otherwise noted.) UC284XA UC384XA Characteristics Symbol Min Typ Max Min Typ Max Unit REFERENCE SECTION Reference Output Voltage (IO = 1.0 mA, TJ = 25°C) Vref 4.95 5.0 5.05 4.9 5.0 5.1 V Line Regulation (VCC = 12 V to 25 V) Regline – 2.0 20 – 2.0 20 mV Load Regulation (IO = 1.0 mA to 20 mA) Regload – 3.0 25 – 3.0 25 mV Temperature Stability TS – 0.2 – – 0.2 – mV/ °C Total Output Variation over Line, Load, Temperature Vref 4.9 – 5.1 4.82 – 5.18 V Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = 25°C) Vn – 50 – – 50 – µV Long Term Stability (TA = 125°C for 1000 Hours) S – 5.0 – – 5.0 – mV Output Short Circuit Current ISC – 30 – 85 – 180 – 30 – 85 – 180 mA OSCILLATOR SECTION Frequency TJ = 25°C TA = Tlow to Thigh fosc 47 46 52 – 57 60 47 46 52 – 57 60 kHz Frequency Change with Voltage (VCC = 12 V to 25 V) ∆fosc/∆V – 0.2 1.0 – 0.2 1.0 % Frequency Change with Temperature TA = Tlow to Thigh ∆fosc/∆T – 5.0 – – 5.0 – % Oscillator Voltage Swing (Peak–to–Peak) Vosc – 1.6 – – 1.6 – V Discharge Current (Vosc = 2.0 V) TJ = 25°C TA = Tlow to Thigh Idischg 7.5 7.2 8.4 – 9.3 9.5 7.5 7.2 8.4 – 9.3 9.5 mA NOTES: 1. Maximum Package power dissipation limits must be observed. 2. Adjust VCC above the Startup threshold before setting to 15 V. 3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible Tlow = –20°C for UC3842A, UC3843A Thigh = +70°C for UC3842A, UC3843A Tlow = –25°C for UC2842A, UC2843A Thigh = +85°C for UC2842A, UC2843A |
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