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UC2871 Fiches technique(PDF) 3 Page - Texas Instruments |
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UC2871 Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 14 page PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Open Lamp Detect Section Soft Start Threshold VEA(-) = 0V 2.9 3.4 3.8 V Error Amp Threshold VSS = 4.2V 0.7 1.0 1.3 V Soft Start Current VSS = 2V 10 20 40 µA Error Amp 2 Section Input Offset Voltage VO = 2V 0 10 mV Input Bias Current -0.2 -1 µA Input Offset Current 0.5 µA Open Loop Gain VO = 0.5 to 3V 65 90 dB Output High VID = 100mV, VO = 2V 3.6 4 4.4 V Output Low VID = -100mv, VO = 2V 0.1 0.2 V Output Source Current VID = 100mV, VO = 2V -350 -500 µA Output Sink Current VID = -100mV, VO = 2V 10 20 mA Common Mode Range 0VIN-2V V Unity Gain Bandwidth TJ = 25 °C (Note 4) 1 MHz Isense Section Threshold 0.475 0.525 0.575 V Output Section Output Low Level IOUT = 0, Outputs A and B 0.05 0.2 V IOUT = 10mA 0.1 0.4 V IOUT = 100mA 1.5 2.2 V Output High Level IOUT = 0, Outputs C and D 14.7 14.9 V IOUT = -10mA 13.5 14.3 V IOUT = -100mA 12.5 13.5 V Rise Time TJ = 25 °C, Cl = 1nF(Note 4) 30 80 ns Fall Time TJ = 25 °C, Cl = 1nF(Note 4) 30 80 ns Output Dynamics Out A and B Duty Cycle 48 49.9 50 % Out C Max Duty Cycle VEA1(-) = 1V 100 % Out C Min Duty Cycle VEA1(-) = 2V 0 % Out D Max Duty Cycle VEA2(+)- VEA2(-) = 100mV 92 96 % Out D Min Duty Cycle VEA2(+)- VEA2(-) = -100mV 0 % Under Voltage Lockout Section Start-Up Threshold 3.7 4.2 4.5 V Hysterisis 120 200 280 mV Enable Section Input High Threshold 2V Input low Threshold 0.8 V Input Current VENABLE = 5V 150 400 µA Supply Current Section VCC Supply Current VCC = 20V 8 14 mA VC Supply Current VC=20V 7 12 mA ICC Disabled VCC = 20V, VENABLE = 0V 1 10 µA UC1871 UC2871 UC3871 ELECTRICAL CHARACTERISTICS (cont.) Unless otherwise stated, these parameters apply for TA = -55 °C to +125°C for the UC1871; -25 °C to +85°C for the UC2871; 0°C to +70°C for the UC3871; VCC = 5V, VC = 15V, VENABLE = 5V, CT = 1nF, Zero Det = 1V. Note 3: Unless otherwise specified, all voltages are with respect to ground. Currents are positive into, and negative out of the specified terminal. Note 4: Guaranteed by design but not 100% tested in production. Note 5: Impedance below specified maximum guarantees proper operation of the Open Lamp Detect. 3 |
Numéro de pièce similaire - UC2871 |
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Description similaire - UC2871 |
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