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UC1876N Datasheet(PDF) 4 Page - Texas Instruments |
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UC1876N Datasheet(HTML) 4 Page - Texas Instruments |
4 / 19 page 4 UC1875/6/7/8 UC2875/6/7/8 UC3875/6/7/8 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, –55°C < TA < 125°C for the UC1875/6/7/8, –25°C < TA < 85°C for the UC2875/6/7/8 and 0°C < TA < 70°C for the UC3875/6/7/8, VC = VIN = 12V, RFREQSET = 12kΩ,CFREQSET = 330pF, RSLOPE = 12kΩ,CRAMP = 200pF, CDELAYSET A-B =CDELAYSET C-D = 0.01µF, IDELAYSET A-B =IDELAYSET C-D = –500µA, TA =TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Error Amplifier Offset Voltage 515 mV Input Bias Current 0.6 3 µA AVOL 1V < VE/AOUT <4V 60 90 dB CMRR 1.5V < VCM < 5.5V 75 95 dB PSRR 11V < VIN < 20V 85 100 dB Output Sink Current VE/AOUT = 1V 1 2.5 mA Output Source Current VE/AOUT = 4V –1.3 –0.5 mA Output Voltage High IE/AOUT = –0.5mA 4 4.7 5 V Output Voltage Low IE/AOUT = 1mA 0 0.5 1 V Unity Gain BW (Note 8) 7 11 MHz Slew Rate (Note 8) 6 11 V/ µsec PWM Comparator Ramp Offset Voltage TJ = 25°C (Note 3) 1.3 V Zero Phase Shift Voltage (Note 4) 0.55 0.9 V PWM Phase Shift (Note1) and (Note 7) VE/AOUT > (Ramp Peak + Ramp Offset) 98 99.5 102 % VE/AOUT < Zero Phase Shift Voltage 0 0.5 2 % Output Skew (Note 1) and (Note 7) VE/AOUT < 1V 5 ±20 nsec Ramp to Output Delay, (Note 8) UC3875/6/7/8 (Note 6) 65 100 nsec UC1875/6/7/8, UC2875/6/7/8 (Note 6) 65 125 nsec Oscillator Initial Accuracy TJ = 25°C 0.85 1 1.15 MHz Voltage Stability 11V < VIN < 20V 0.2 2 % Total Variation Line, Temperature 0.80 1.20 MHz Sync Pin Threshold TJ = 25°C 3.8 V Clock Out Peak TJ = 25°C 4.3 V Clock Out Low TJ = 25°C 3.3 V Clock Out Pulse Width RCLOCKSYNC = 3.9kΩ 30 100 nsec Maximum Frequency, (Note 7) RFREQSET =5kΩ 2 MHz Ramp Generator/Slope Compensation Ramp Current, Minimum ISLOPE =10µA, VFREQSET = VREF –11 –14 µA Ramp Current, Maximum ISLOPE = 1mA, VFREQSET = VREF –0.8 –0.95 mA Ramp Valley 0V Ramp Peak - Clamping Level RFREQSET = 100kΩ 3.8 4.1 V Current Limit Input Bias VCS+=3V 2 5 µA Threshold Voltage 2.4 2.5 2.6 V Delay to Output, (Note 8) UC3875/6/7/8 85 125 nsec UC1875/6/7/8, UC2875/6/7/8 85 150 nsec |
Similar Part No. - UC1876N |
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Similar Description - UC1876N |
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