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UC2849 Scheda tecnica(PDF) 3 Page - Texas Instruments |
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UC2849 Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 11 page 3 PARAMETER TEST CONDITION MIN TYP MAX UNITS Current Error Amplifier (cont.) Avo 60 90 dB GBW (Note 2) Acl = 1, RIN = 1k, CC=15pF, f=200kHz (Note 1) 4.5 7 MHz Vol IO = 1mA, Voltage above VEE 0.5 V Voh IO = 0mA 3.8 V IO = −1mA 3.5 V CMRR −0.2 < Vcm < 8V 80 dB PSRR 10V < VCC < 20V 80 dB Voltage Error Amplifier Ib 0.5 3 µA Vio 25 mV Avo 60 90 dB GBW (Note 2) f = 200kHz 4.5 7 MHz Vol IO = 175 µA, Volts above VEE 0.3 0.6 V Voh ILIM > 3V 2.85 3 3.15 V Voh - ILIM Tested ILIM = 0.5V, 1.0V, 2.0V −100 100 mV CMRR −0.2 < Vcm < 8V 80 dB PSRR 10V < VCC < 20V 80 dB 2X Amplifier and Share Amplifier V offset (b; y = mx + b) 20 mV GAIN (m; y = mx + b) Slope with AVOUT = 1V and 2V 1.98 2.02 V GBW (Note 2) 100 kHZ RSHARE VCC = 0, VSHARE/ISHARE 200 k Total Offset Negative supply is VEE, GND Open, VAO = GND −75 0 75 mV Vol VAO = Voltage Amplifier Vol, Volts above VEE 0.2 0.45 0.6 V Voh IO = 0mA, ILIM = 3V, VAO = Voltage Amp Voh 5.7 6 6.3 V IO = −1mA, ILIM = 3V, VAO = Voltage Amp Voh 5.7 6 6.3 V Adjust Amplifier Vio 40 60 80 mV gm IOUT= −10µA to 10µA, VOUT = 3.5V, CADJ = 1µF −1mS Vol IOUT = 0 0.9 1 1.1 V IOUT = 50 µA 0.85 1 1.15 V Voh IOUT = 0, VSHARE = 6.5V 5.7 6 6.3 V IOUT = −50µA, VSHARE = 6.5V 5.7 6 6.3 V Oscillator Frequency 450 500 550 kHz Max Duty Cycle 80 85 90 % OSC Ramp Amplitude 2 2.5 2.8 V Clock Driver/SYNC (CLKSYN) Vol 0.02 0.2 V Voh 3.6 V RCLKSYN = 200 Ω 3.2 V ISOURCE 25 mA RCLKSYN VCC = 0, VCLKSYN/ICLKSYN 10 k VTH 1.5 V UC1849 UC2849 UC3849 ELECTRICAL CHARACTERISTICS Unless otherwise stated these specifications apply for TA = −55°Cto +125°C for UC1849; −40 °C to +85°C for UC2849; and 0°C to +70°C for UC3849;VCC = 12V, VEE = GND, Output no load, CT = 345pF, RT = 4530 Ω, RDEAD = 511Ω, RCLKSYN = 1k, TA = TJ. |
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