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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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UC19432-SP Fiches technique(PDF) 3 Page - Texas Instruments |
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UC19432-SP Fiches technique(HTML) 3 Page - Texas Instruments |
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3 / 8 page  gm = ¾ (5.1 + ) W R L -0.714 I = MAX 0.65 V - 5.1 + W R L UC19432-SP www.ti.com SLUS951A – NOVEMBER 2009 – REVISED JULY 2010 ELECTRICAL CHARACTERISTICS over operating free-air temperature range, COLL output = 2.4 V to 24 V, VCC = 15 V, ICOLL = 10 mA, TA = TJ = –55°C to 125°C (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Reference voltage tolerance TA = 25°C, VCOLL = 5 V 1.295 1.3 1.305 V Reference temperature tolerance VCOLL = 5 V 1.291 1.3 1.309 V VCC = 2.4 V to 24 V, Reference line regulation 10 38 mV VCOLL = 5 V ICOLL = 10 mA TO 50 mA, Reference load regulation 10 38 mV VCOLL = 5 V Reference sink current 10 mA Reference source current -10 mA EA input bias current –0.5 –0.2 mA EA input offset voltage -4 4 mV EA+ Operational voltage limitations 0.9 1.6 V EA output current sink (internally limited) 16 mA EA output current source -0.8 mA Minimum operating current VCC = 24 V, VCOLL = 5 V 0.5 0.8 mA VCOLL = VCC = 24 V, Ref = 1.3 V, Collector current limit(1) 130 155 mA ISET = GND Collector saturation ICOLL = 20 mA 0.7 1.1 1.5 V VCC = 2.4 V to 24 V, Transconductance (gm)(1) (2) –170 –140 –110 mS VCOLL = 3 V, ISET = GND Error amplifier AVOL 60 90 dB Error amplifier GBW 1.5 3 MHz Transconductance amplifier GBW 3 MHz (1) Programmed transconductance and collector current limit equations are specified in the ISET pin description. (2) Measured as ΔICOLL/ΔVCOMP for ICOLL = 5 mA to 20 mA. PIN DESCRIPTIONS COLL The collector of the output transistor with a maximum voltage of 24 V. This pin is the output of the transconducance amplifier. The overall open loop voltage gain of the transconductance amplifier is gm x RL, where gm is designed to be –140 mS ±30 mS and RL represents the output load. COMP The output of the error amplifier and the input to the transconductance amplifier. This pin is available to compensate the high frequency gain of the error amplifier. It is internally voltage limited to approximately 2 V. EA+ The non-inverting input to the error amplifier. GND The reference and power ground for the device. The power ground of the output ransistor is isolated on the chip from the substrate ground used to bias the remainder of the device. ISET The current set pin for the transconductance amplifier. The transconductance will be –140 mS as specified in the electrical table if this pin is grounded. If a resistance, RL, is added to the ISET pin, the resulting new transconductance is calculated using Equation 1. The maximum current will be approximated by Equation 2. (1) (2) REF The output of the trimmed precision reference. It can source or sink 10 mA and still maintain less than ±1% output variation. Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): UC19432-SP |
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