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UC2844 Scheda tecnica(PDF) 4 Page - Unisonic Technologies |
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UC2844 Scheda tecnica(HTML) 4 Page - Unisonic Technologies |
4 / 7 page UC2844/45 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 4 of 7 www.unisonic.com.tw QW-R103-051.B ABSOLUTE MAXIMUM RATINGS (TA=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Current Sense and Voltage feedback Inputs VIN -0.3 ~ +5.5 V Total Power Supply and Zener Current (ICC+IZ) 30 mA Error Amp Output Sink Current ISINK 10 mA Output Current, Source or Sink (Note 2) IOUT 1.0 A Output Energy (Capacitive Load per cycle) W 5.0 μJ Power Dissipation PD 800 mW Junction Temperature TJ +150 °С Operating Junction Temperature TJ(OPR) -40 ~ +120 °С Storage Temperature TSTG -65 ~ +150 °С Note:1.Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2.Maxmum package power dissipation limits must be observed. THERMAL DATA PARAMETER SYMBOL RATINGS UNIT Junction to Ambient θJA 156 °С /W ELECTRICAL CHARACTERISTICS (TA=25°С, VCC=15V, RT=10k, CT=3.3nF, -40°С ≤ TA ≤ 120°С, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT REFERENCE SECTION Reference Output Voltage VREF IOUT=1.0mA,TJ=25°С 4.95 5.0 5.05 V Line Regulation △ VOUT VCC=12V ~ 25V 2.0 20 mV Load Regulation △ VOUT IOUT=1.0mA ~ 20mA 3.0 25 mV Temperature Stability tS 0.2 mV/°С Total Output Variation over Line, Load, Temperature VREF 4.9 5.1 V Output Noise Voltage eN f=10Hz ~ 10kHz, TJ=25°С 50 μV Long Term Stability S TA=125°С for 1000 Hours 5 mV Output Short Circuit Current ISC -30 -85 -180 mA OSCILLATOR SECTION Oscillator Voltage Swing VOSC 1.6 V Discharge Current IDSG VOSC=2.0V, TJ=25°С 10.8 mA Frequency fOSC TJ=25°С, 47 52 57 kHz TLOW ≤ TA ≤ THI 46 60 Frequency Change with Voltage ΔfOSC/ΔV VCC=12V ~ 25V 0.2 1.0 % Frequency Change with Temperature ΔfOSC/ΔT TLOW ≤ TA ≤ THI 5.0 % ERROR AMPLIFIER SECTION Voltage Feedback Input VFB VOUT=2.5V 2.45 2.50 2.55 V Output Voltage Swing High VOH RL=15k to ground, VFB=2.3V 5.0 6.2 V Low VOL RL=15k to VREF, VFB=2.7V 0.8 1.1 Output Current Sink ISINK VOUT=1.1V, VFB=2.7V 2.0 12 mA Source ISOURCE VOUT=5.0V, VFB=2.3V -0.5 -1.0 Input Bias Current II(BIAS) VFB=2.7V -0.1 -1.0 μA Open Loop Voltage Gain GVO VOUT=2.0V ~ 4.0V 65 90 dB Power Supply Rejection Ratio PSRR VCC=12V ~ 25V 60 70 dB Unity Gain Bandwidth GBW TJ=25°С 0.7 1.0 MHz |
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