Datenblatt-Suchmaschine für elektronische Bauteile |
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UC3845 Datenblatt(PDF) 4 Page - Texas Instruments |
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UC3845 Datenblatt(HTML) 4 Page - Texas Instruments |
4 / 28 page www.ti.com (7) Gain defined as: A + D VPIN 1 DVPIN 3 , 0 v VPIN 3 v 0.8 V UC1842/3/4/5 UC2842/3/4/5 UC3842/3/4/5 SLUS223C – APRIL 1997 – REVISED JUNE 2007 ELECTRICAL CHARACTERISTICS (continued) Unless otherwise stated, these specifications apply for –55 °C ≤ T A≤ 125°C for the UC184X; –40°C ≤ TA≤ 85°C for the UC284X; 0 °C ≤ T A≤ 70°C for the 384X; VCC = 15 V; RT = 10 kΩ; CT = 3.3 nF, TA = TJ. UC1842/3/4/5 UC3842/3/4/5 UC2842/3/4/5 PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP MAX ERROR AMP SECTION Input Voltage VPIN 1 = 2.5 V 2.45 2.50 2.55 2.42 2.50 2.58 V Input Bias Current –0.3 –1 –0.3 –2 µA AVOL 2 ≤ V O≤ 4 V 65 90 65 90 dB Unity Gain Bandwidth TJ = 25°C (5) 0.7 1 0.7 1 MHz PSRR 12 ≤ V CC≤ 25 V 60 70 60 70 dB Output Sink Current VPIN 2 = 2.7 V, VPIN 1 = 1.1 V 2 6 2 6 mA Output Source Current VPIN 2 = 2.3 V, VPIN 1 = 5 V –0.5 –0.8 –0.5 –0.8 VOUT High VPIN 2 = 2.3 V, RL = 15 kΩ to ground 5 6 5 6 V VOUT Low VPIN 2 = 2.7 V, RL = 15 kΩ to Pin 8 0.7 1.1 0.7 1.1 CURRENT SENSE SECTION Gain See (6)(7) 2.85 3 3.15 2.85 3 3.15 V/V Maximum Input Signal VPIN 1 = 5 V (6) 0.9 1 1.1 0.9 1 1.1 V PSRR 12 ≤ V CC≤ 25 V (5) (6) 70 70 dB Input Bias Current –2 –10 –2 –10 µA Delay to Output VPIN 3 = 0 V to 2 V (5) 150 300 150 300 ns OUTPUT SECTION ISINK = 20 mA 0.1 0.4 0.1 0.4 Output Low Level ISINK = 200 mA 1.5 2.2 1.5 2.2 V ISOURCE = 20 mA 13 13.5 13 13.5 Output High Level ISOURCE = 200 mA 12 13.5 12 13.5 Rise Time TJ = 25°C, CL = 1 nF (5) 50 150 50 150 ns Fall Time TJ = 25°C, CL = 1nF(5) 50 150 50 150 UNDER-VOLTAGE LOCKOUT SECTION X842/4 15 16 17 14.5 16 17.5 Start Threshold X843/5 7.8 8.4 9.0 7.8 8.4 9.0 V X842/4 9 10 11 8.5 10 11.5 Min. Operating Voltage After Turn On X843/5 7.0 7.6 8.2 7.0 7.6 8.2 PWM SECTION X842/3 95% 97% 100% 95% 97% 100% Maximum Duty Cycle X844/5 46% 48% 50% 47% 48% 50% Minimum Duty Cycle 0% 0% TOTAL STANDBY CURRENT Start-Up Current 0.5 1 0.5 1 mA Operating Supply Current VPIN 2 = VPIN 3 = 0 V 11 17 11 17 VCC Zener Voltager ICC = 25 mA 30 34 30 34 V (5) These parameters, although specified, are not 100% tested in production. (6) Parameter measured at trip point of latch with VPIN 2 = 0. 4 Submit Documentation Feedback |
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