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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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TPS54231 Fiches technique(PDF) 6 Page - Texas Instruments |
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TPS54231 Fiches technique(HTML) 6 Page - Texas Instruments |
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6 / 31 page  TPS54231 SLUS851D – OCTOBER 2008 – REVISED OCTOBER 2014 www.ti.com 7.5 Electrical Characteristics TJ = –40°C to 150°C, VIN = 3.5 to 28 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (VIN PIN) Internal undervoltage lockout threshold Rising and falling 3.5 V Shutdown supply current EN = 0V, VIN = 12V, –40°C to 85°C 1 4 μA Operating – non switching supply current VSENSE = 0.85 V 75 110 μA ENABLE AND UVLO (EN PIN) Enable threshold Rising and falling 1.25 1.35 V Input current Enable threshold – 50 mV -1 μA Input current Enable threshold + 50 mV -4 μA VOLTAGE REFERENCE Voltage reference 0.772 0.8 0.828 V HIGH-SIDE MOSFET BOOT-PH = 3 V, VIN = 3.5 V 115 200 On resistance m Ω BOOT-PH = 6 V, VIN = 12 V 80 150 ERROR AMPLIFIER Error amplifier transconductance (gm) –2 μA < I(COMP) < 2 μA, V(COMP) = 1 V 92 μmhos Error amplifier DC gain(1) VSENSE = 0.8 V 800 V/V Error amplifier unity gain bandwidth(1) 5 pF capacitance from COMP to GND pins 2.7 MHz Error amplifier source/sink current V(COMP) = 1 V, 100-mV overdrive ±7 μA Switch current to COMP VIN = 12 V 9 A/V transconductance PULSE SKIPPING ECO-MODE Pulse skipping Eco-mode™ switch 100 mA current threshold CURRENT LIMIT Current limit threshold VIN = 12 V 2.3 3.5 5.3 A THERMAL SHUTDOWN Thermal Shutdown 165 °C SLOW START (SS PIN) Charge current V(SS) = 0.4 V 2 μA SS to VSENSE matching V(SS) = 0.4 V 10 mV (1) Specified by design. 7.6 Switching Characteristics TJ = –40°C to 150°C, VIN = 3.5 to 28 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SWITCHING FREQUENCY TPS54231 device switching frequency VIN = 12 V 400 570 740 kHz Minimum controllable on time VIN = 12 V, 25°C 105 130 ns Maximum controllable duty ratio(1) BOOT-PH = 6 V 90% 93% (1) Specified by design. 6 Submit Documentation Feedback Copyright © 2008–2014, Texas Instruments Incorporated Product Folder Links: TPS54231 |
Numéro de pièce similaire - TPS54231_16 |
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Description similaire - TPS54231_16 |
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