Texas Instruments HPA070 - Manuals

Page 2 - EVM IMPORTANT NOTICE

2 EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATIONPURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods ...

Page 3 - DYNAMIC WARNINGS AND RESTRICTIONS

3 DYNAMIC WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 V DC to 14 V DC . Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.If there are questions concerning the input range, please contact a T...

Page 4 - Introduction

SLUU186 − March 2004 4 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) Mark Dennis System Power Contents 1 Introduction 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5 - Schematic

SLUU186 − March 2004 5 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 3 Schematic + + Figure 1. TPS40055EVM−001 (HPA070) Schematic

Page 6 - Component Selection; Frequency of Operation

SLUU186 − March 2004 6 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 4 Component Selection 4.1 TPS40055 Device Selection The TPS4005x family of parts offers a range of output current configurations including source only (TPS40054),source/sink (TPS40055), or source/sink with V OUT...

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

SLUU186 − March 2004 8 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 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 by...

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

SLUU186 − March 2004 10 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 5 Test Setup Figure 2 illustrates the basic test setup needed to evaluate the TPS40055EVM−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 f...

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

SLUU186 − March 2004 11 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 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 1...

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

SLUU186 − March 2004 12 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 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 to...

Page 15 - List of Materials

SLUU186 − March 2004 15 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 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. TPS40055EVM−001 (HPA070) List of Materials REFERENCE DESIGN...

Page 16 - References

SLUU186 − March 2004 16 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 9 References 1. Data Sheet, TPS40055 Wide-Input Synchronous Buck Controller (SLUS593). 2. Technical Brief, PowerPAD Thermally Enhanced Package (SLMA002).