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UC2855BDW Datasheet(PDF) 3 Page - Texas Instruments |
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UC2855BDW Datasheet(HTML) 3 Page - Texas Instruments |
3 / 12 page 3 UC2855A/B UC3855A/B ELECTRICAL CHARACTERISTICS:Unless otherwise specified: VCC = 18V, RT = 15k, RVS = 23k, CT = 470pF, CI = 150pF, VRMS = 1.5V, IAC = 100 µA, ISENSE = 0V, CAOUT = 4V, VAOUT= 3.5V, VSENSE = 3V. –40°C to 85°C (UC2855A/B), 0°C to 70 °C (UC3855A/B). PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Current Amplifier Input Offset Voltage VCM = − 2.5V −44 mV Input Bias Current (Sense) VCM = 2.5V −500 500 nA Open Loop Gain VCM = 2.5V, VOUT =2to6V 80 110 dB VOUT High ILOAD = −500µA6 V VOUT Low ILOAD = 500µA 0.3 0.5 V Output Short Circuit Current VOUT =0V 1 3 mA Common Mode Range −0.3 5 V Gain Bandwidth Product FIN = 100kHz, 10mV, P–P, TA = 25°C 2.5 5 MHz Reference Output Voltage IREF = 0mA, TA = 25°C 7.388 7.5 7.613 V IREF = 0mA 7.313 7.5 7.688 V Load Regulation IREF =1to10mA −15 15 mV Line Regulation VCC = 15 to 35V −10 10 mV Short Circuit Current REF = 0V 20 45 65 mA Oscillator Initial Accuracy TA =25°C 170 200 230 kHz Voltage Stability VCC =12to18V 1 % Total Variation Line, Temp. 160 240 kHz Ramp Amplitude (P–P) Outputs at 0% duty cycle 4.7 5.7 V Ramp Valley Voltage 1.1 1.6 V Enable/OVP/Current Limit Enable Threshold 1.8 2.2 V OVP Threshold 7.5 7.66 V OVP Hysteresis 200 400 600 mV OVP Propagation Delay 200 ns OVP Input Bias Current V= 7.5V 1 10 µA PKLIMIT Threshold 1.25 1.5 1.75 V PKLIMIT Input Current VPKLIMIT = 1.5V 100 µA PKLIMIT Prop. Delay 100 ns Multiplier Output Current - IAC Limited IAC = 100 µA, VRMS = 1V −235 −205 −175 µA Output Current - Zero IAC = 0 µA −2 −0.2 2 µA Output Current - Power Limited VRMS = 1.5V, VAOUT = 5.5V −250 −209 −160 µA Output Current VRMS = 1.5V, VAOUT = 2V −26 µA VRMS = 1.5V VAOUT = 5V −190 µA VRMS = 5V, VAOUT = 2V −3 µA VRMS = 5V, VAOUT = 5V −17 µA Gain Constant Refer to Note 1 −0.95 −0.85 −0.75 1/V Gate Driver Output Output High Voltage lOUT = −200mA, VCC = 15V 12 12.8 V Output Low Voltage lOUT = 200mA 1 2.2 V Output Low Voltage lOUT = 10mA 300 500 mV Output Low (UVLO) lOUT = 50mA, VCC = 0V 0.9 1.5 V Output RISE/FALL Time CLOAD = 1nF 35 ns Output Peak Current CLOAD = 10nF 1.5 A |
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