Texas Instruments 12V Input, 1.5V Output, 10A Sync Buck Converter Evaluation Module TPS40190EVM-001 TPS40190EVM-001 Scheda Tecnica

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TPS40190EVM-001
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User’s Guide 
SLUU232 –February 2006 
Using the TPS40190EVM-001 
A 12V Input, 1.5V Output, 10A Synchronous Buck Converter 
System Power Management – DC/DC Controllers 
1 INTRODUCTION 
The TPS40190EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.5V output 
at up to 10A from a 12V input bus.  The EVM is designed to start up from a single supply, so no additional bias 
voltage is required for start-up.  The module uses the TPS40190 Reduced Pin Count Synchronous Buck 
Controller. 
1.1 DESCRIPTION 
TPS40190EVM-001 is designed to use a regulated 12V (10V-14V) bus to produce a high current, regulated 1.5V 
output at up to 10A of load current.  The TPS40190EVM-001 is design to demonstrate the TPS40190 in a typical 
regulated bus to low-voltage application while providing a number of test points to evaluate the performance of 
the TPS40190 in a given application.  The EVM can be modified to support output voltages from 0.9V to 3.3V by 
changing a single set resistor.  
1.2 APPLICATIONS 
•  Non-Isolated Medium Current Point of Load and low voltage bus converters. 
• Networking 
Equipment 
• Telecommunications 
Equipment 
•  DC Power Distributed Systems 
1.3 FEATURES 
•  10V - 14V input range 
•  1.5V fixed output, adjustable with single resistor 
•  10Adc Steady State Output Current 
•  300kHz switching frequency (Fixed by TPS40190) 
•  Single Main Switch N-channel MOSFET and Single Synchronous Rectifier N-channel MOSFET 
•  Double Sided 3” x 3” PCB with all components on top side 
•  Active Converter uses less than 1.2 square inches – 1.775 x 0.670 
•  Convenient test points for probing critical waveforms and non-invasive loop response testing