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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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TPS65279VDAPR Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS65279VDAPR Fiches technique(HTML) 1 Page - Texas Instruments |
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1 / 46 page  TPS65279V www.ti.com SLVSBW1B – FEBRUARY 2013 – REVISED JANUARY 2014 4.5-V TO 18-V INPUT VOLTAGE, 5-A/5-A DUAL SYNCHRONOUS STEP-DOWN CONVERTER WITH I2C CONTROLLED VID AND CURRENT SHARING Check for Samples: TPS65279V 1 FEATURES • 4.5-V to 18-V Wide Input Voltage Range • Dedicated Enable and Soft-Start for Each Buck • I2C Controlled 7-Bits VID Programmable • Peak Current-Mode Control with Simple Output Voltage from 0.68 V to 1.95 V with Compensation Circuit 10-mV Steps for Each Buck; Output Voltage • Cycle-by-Cycle Over Current Protection Can Also be Set By Resistor Divider • 180° Out-of-Phase Operation to Reduce Input • Programmable Slew Rate Control for Output Capacitance and Power Supply Induced Noise Voltage Transition • Over Temperature Protection • Up to 5-A Maximum Continuous Output • Available in 32-Pin Thermally Enhanced Current in Buck 1 and Buck 2 HTSSOP (DAP) and 36-Pin QFN 6-mm x 6-mm • Buck 1 and Buck 2 can be Paralleled to Deliver (RHH) Packages up to 10-A Current • I2C Compatible Interface With Standard Mode APPLICATIONS (100 kHz) and Fast Mode (400 kHz) • DTV • I2C Read Back Power Good Status and Die • TCON Temperature Warning • BDVD • Pulse Skipping Mode to Achieve High • Set Top Boxes Efficiency in Light Load • Tablet PC • Adjustable Switching Frequency 200 kHz - 1.6 MHz Set by External Resistor DESCRIPTION/ORDERING INFORMATION The TPS65279V is a monolithic dual synchronous buck regulator with wide 4.5-V to 18-V operating input voltage that can operate in 5-, 9-, 12- or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application. Each buck converter in TPS65279V has external feedback resistors that can be used for setting the initial start up voltage. The feedback voltage reference for this start-up option is 0.6 V. Once the VID DAC is updated via the I2C, the buck converter switches feedback resistors from external to internal. The output voltage in each buck can be programmable from 0.68 V to 1.95 V in 10-mV steps with I2C Controlled 7-Bits VID. Each buck converter in TPS65279V can also be I2C controlled for enabling/disabling output voltage, setting the pulse skipping mode and reading the power good status and die temperature warning. The switching frequency of the converters can be set from 200 kHz to 1.6 MHz with an external resistor. Two converters have clock signal with 180° out-of-phase. Two bucks in TPS65279V can be paralleled to deliver up to 10-A load current by floating the MODE pin. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise. TPS65279V features dedicated enable pin when I2C interface is not used. Independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle over current protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions. Low side reverse over current protection also prevents excessive sinking current from damaging the converter. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2013–2014, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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