Texas Instruments TPS40051 - Manuals

Page 4 - Introduction

SLUU161 – April, 2003 4 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) Mark Dennis System Power Contents 1 Introduction 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Page 5 - Schematic

SLUU161 – April, 2003 5 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 3 Schematic + + Figure 1. TPS40051EVM–001 (SLUP195) Schematic

Page 6 - Component Selection; Frequency of Operation

SLUU161 – April, 2003 6 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 4 Component Selection 4.1 TPS40051 Device Selection The TPS4005x family of parts offers a range of output current configurations including source only (TPS40050),source/sink (TPS40051), or source/sink with V O...

Page 8 - Output Capacitor Selection; F with V; mW; where; MOSFET selection; of 6 m

SLUU161 – April, 2003 8 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 4.6 Output Capacitor Selection Selection of the output capacitor is based on many application variables, including function, cost, size, andavailability. The minimum allowable output capacitance is determined ...

Page 10 - Test Setup; DC Input Source; and rated for at least 4; Output Load; when operating at and near full load.; Fan

SLUU161 – April, 2003 10 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 5 Test Setup Figure 2 illustrates the basic test setup needed to evaluate the TPS40051EVM–001. 5.1 DC Input Source The input voltage source should be capable of supplying between 10 V DC and 14 V DC and rated...

Page 11 - Test Results / Performance Data; Efficiency and Power Loss; Figure 3; Closed Loop Performance

SLUU161 – April, 2003 11 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 6 Test Results / Performance Data 6.1 Efficiency and Power Loss Figure 3 shows the efficiency as the load is varied from 1 A to over 15 A. The typical efficiency remains over90% as the load ranges from 3 A to...

Page 12 - Output Ripple and Transient Response; Figure 6 shows the typical output voltage ripple with I; Figure 6; Figure 7; EVM Assembly Drawing and PCB Layout; Figure 8. Top Side Component Assembly

SLUU161 – April, 2003 12 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 6.3 Output Ripple and Transient Response Figure 6 shows the typical output voltage ripple with I OUT =15 A to be less than 20 mVpp. The transient response is shown in Figure 7 as the load is stepped from 5 A ...

Page 15 - List of Materials

SLUU161 – April, 2003 15 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 8 List of Materials Table 1 lists the parts values of the evaluation board. These values can be modified to meet the applicationrequirements. Table 1. TPS40051EVM–001 (SLUP195) List of Materials REFERENCE DES...

Page 16 - References

SLUU161 – April, 2003 16 TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195) 9 References 1. Data Sheet, TPS40051 Wide-Input Synchronous Buck Controller, Texas Instruments Literature NumberSLUS540. 2. Technical Brief, PowerPAD Thermally Enhanced Package, Texas Instruments Literature N...