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TPS40192DRCTG4 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS40192DRCTG4 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 35 page 1 2 3 4 10 9 8 7 HDRV SW BOOT LDRV ENABLE FB COMP VDD TPS40192 TPS401923 5 6 BP5 PGD 11 GND VIN VOUT ON/ OFF External logic supply 5-V or less or BP5 VOUT Copyright © 2016, Texas Instruments Incorporated +3.3V PGD Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TPS40192, TPS40193 SLUS719F – MARCH 2007 – REVISED NOVEMBER 2016 TPS4019x 4.5-V to 18-V Input, 10-Pin, Synchronous Buck Controller With Power Good 1 1 Features 1 • Input Operating Voltage Range: 4.5 V to 18 V • Up to 20-A Output Currents • Supports Pre-Biased Outputs • 0.5%, 591-mV Reference • Switching Frequency – TPS40192: 600 kHz – TPS40193: 300 kHz • Three Selectable Thermally Compensated Short- Circuit Protection Levels • Hiccup Restart from Faults • Internal 5-V Regulator • High-Side and Low-Side MOSFET ON-resistance (RDS(on)) Current Sensing • 10-Pin 3 mm × 3 mm SON Package • Internal 4-ms Soft-Start Time • Thermal Shutdown Protection at 145°C 2 Applications • Cable Modem CPE • Digital Set Top Box • Graphics/Audio Cards • Entry Level and Mid-Range Servers 3 Description TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage- mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power- supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is latched. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This behavior provides limited power dissipation in the event of a sustained fault. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) TPS40192 VSON (10) 3.00 mm × 3.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Application Diagram |
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