Texas Instruments HPA070 User Manual
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Texas Instruments HPA070 User Manual

Texas Instruments HPA070 User Manual

Tps40055-based design converts 12-v bus to 1.8 v at 15 a
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User's Guide
TPS40055-Based Design Converts
12-V Bus to 1.8 V at 15 A (HPA070)
User's Guide
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Summary of Contents for Texas Instruments HPA070

  • Page 1 User’s Guide TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) User’s Guide...

  • Page 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 EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
  • Page 3 These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Copyright  2004, Texas Instruments Incorporated to 14 V Mailing Address:...

  • Page 4: Table Of Contents

    Line/load regulation < 0.5% High-frequency 300-kHz operation Transient deviation 60 mV with 10-A load step TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 1.8 V at 15 A (HPA070) Contents ..........

  • Page 5: Schematic

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

  • Page 6: Component Selection

    IN(min) incorporated into this equation, so the actual V frequency of 300-kHz, the R TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) prebias (TPS40057). In this converter the TPS40055 with contains more information on the PowerPAD...
  • Page 7 0.25 V 10 V 300 kHz + 15 + 6.4 A TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) SLUU186 − March 2004 range, to the module to drop when under calculation. . R4 can be calculated from equation .
  • Page 8 A schottky diode, D2, is placed across Q2 in this high current design to carry some of the high circulating current during short circuit conditions. TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) + 83 mF...

  • Page 9: Short Circuit Protection

    ( 7.9 mW 1.45 ) ) * 30 mV + 16.0 kW 8.65 mA 8.65 mA TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) SLUU186 − March 2004 is defined as: (10) (11) occurs at 3.8 kHz, and...

  • Page 10: Test Setup

    V IN 10 V to 14 V − TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) V IN Test Points TP1 = V IN (+) TP2 = V IN (−) −...

  • Page 11: Test Results And Performance Data

    FREQUENCY Phase Gain 10 k f − Frequency − kHz Figure 5. TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) SLUU186 − March 2004 LOAD I OUT − Output Current − A Figure 4 100 k...

  • Page 12: Output Voltage Ripple

    Figure 6 EVM Assembly Drawing and PCB Layout Figure 8. Top Side Component Assembly TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) =15 A to be less than 20 mVpp. TRANSIENT RESPONSE V OUT = 50 mV/div I OUT 5 A/div t −...
  • Page 13 SLUU186 − March 2004 Figure 9. Top Side Copper Figure 10. Internal Layer 1 Copper TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070)
  • Page 14 SLUU186 − March 2004 Figure 11. Internal Layer 2 Copper Figure 12. Bottom Layer Copper TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070)

  • Page 15: List Of Materials

    1812 1812 7343 (D) SOT23 0.80 x 0.35 0.512 x 0.512 Coiltronics LFPAK LFPAK PWP16 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) SLUU186 − March 2004 PART NUMBER Vishay VJ0805Y471KXAAT C4532X5R1C226MT C4532X5R0J476MT Sanyo 4TPD470M Vishay...

  • Page 16: References

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

  • Page 17: Important Notice

    TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions:...

This manual is also suitable for:

Tps40055

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