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UC284XBD Fiches technique(PDF) 2 Page - ON Semiconductor |
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UC284XBD Fiches technique(HTML) 2 Page - ON Semiconductor |
2 / 20 page UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV http://onsemi.com 2 MAXIMUM RATINGS Rating Symbol Value Unit Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec) VCC, VC 30 V 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, SO–14 Case 751A Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air D1 Suffix, Plastic Package, SO–8 Case 751 Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air N Suffix, Plastic Package, Case 626 Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air PD RθJA PD RθJA PD RθJA 862 145 702 178 1.25 100 mW °C/W mW °C/W W °C/W Operating Junction Temperature TJ +150 °C Operating Ambient Temperature UC3842B, UC3843B UC2842B, UC2843B UC3842BV, UC3843BV, NCV3843BV TA 0 to + 70 – 25 to + 85 –40 to +105 °C Storage Temperature Range Tstg – 65 to +150 °C ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 2], 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 3], unless otherwise noted.) UC284XB 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 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 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) ∆fOSC/∆V – 0.2 1.0 – 0.2 1.0 % Frequency Change with Temperature, TA = Tlow to Thigh ∆fOSC/∆T – 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) TA = Tlow to Thigh (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 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 = 0°C for UC3842B, UC3843B; –25°C for UC2842B, UC2843B; –40°C for UC3842BV, UC3843BV Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B; +105°C for UC3842BV, UC3843BV NCV3843BV: Tlow = –40°C, Thigh = +105°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control. |
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