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UC3842BVD1R2G Folha de dados(PDF) 3 Page - ON Semiconductor |
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UC3842BVD1R2G Folha de dados(HTML) 3 Page - ON Semiconductor |
3 / 22 page UC3842B, UC3843B, UC2842B, UC2843B http://onsemi.com 3 ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 3], RT = 10 k, CT = 3.3 nF. For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 4], unless otherwise noted.) UC284XB, UC2843D UC384XB, XBV 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, and Temperature UC284XB UC2843D Vref 4.9 4.82 − − 5.1 5.18 4.82 − 5.18 V Output Noise Voltage (f = 10 Hz to 10 kHz, TJ = 25°C) Vn − 50 − − 50 − mV 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 TJ = 25°C (RT = 6.2 k, CT = 1.0 nF) fOSC 49 48 225 52 − 250 55 56 275 49 48 225 52 − 250 55 56 275 kHz Frequency Change with Voltage (VCC = 12 V to 25 V) DfOSC/DV − 0.2 1.0 − 0.2 1.0 % Frequency Change with Temperature, TA = Tlow to Thigh DfOSC/DT − 1.0 − − 0.5 − % 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 UC284XB, UC384XB UC2843D, UC384XBV Idischg 7.8 7.5 − 8.3 − − 8.8 8.8 − 7.8 7.6 7.2 8.3 − − 8.8 8.8 8.8 mA ERROR AMPLIFIER SECTION Voltage Feedback Input (VO = 2.5 V) UC284XB UC2843D VFB 2.45 2.42 2.5 2.5 2.55 2.58 2.42 2.5 2.58 V Input Bias Current (VFB = 5.0 V) IIB − − 0.1 −1.0 − − 0.1 − 2.0 mA Open Loop Voltage Gain (VO = 2.0 V to 4.0 V) AVOL 65 90 − 65 90 − dB Unity Gain Bandwidth (TJ = 25°C) BW 0.7 1.0 − 0.7 1.0 − MHz Power Supply Rejection Ratio (VCC = 12 V to 25 V) PSRR 60 70 − 60 70 − dB Output Current Sink (VO = 1.1 V, VFB = 2.7 V) Source (VO = 5.0 V, VFB = 2.3 V) ISink ISource 2.0 − 0.5 12 −1.0 − − 2.0 − 0.5 12 −1.0 − − mA Output Voltage Swing High State (RL = 15 k to ground, VFB = 2.3 V) Low State (RL = 15 k to Vref, VFB = 2.7 V) UC284XB, UC384XB UC2843D, UC384XBV VOH VOL 5.0 − − 6.2 0.8 − − 1.1 − 5.0 − − 6.2 0.8 0.8 − 1.1 1.2 V 3. Adjust VCC above the Startup threshold before setting to 15 V. 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Tlow = 0°C for UC3842B, UC3843B; −25°C for UC2842B, UC2843B; −40°C for UC3842BV, UC3843BV, UC2843D Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B, UC2843D; +105°C for UC3842BV, UC3843BV |
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