Texas Instruments TPS61040EVM Скачать руководство пользователя страница 1 | Manualshive

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February 2002

PMP Portable Power

User’s Guide

SLVU065

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Содержание TPS61040EVM

Страница 1: ...February 2002 PMP Portable Power User s Guide SLVU065...

Страница 2: ...t that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in wh...

Страница 3: ...handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s r...

Страница 4: ...nty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 125 C The EVM is designed to operate p...

Страница 5: ...3 Board Layout Chapter 4 Schematic and Bill of Materials Related Documentation From Texas Instruments TPS601040 41 data sheet literature number SLVS413 FCC Warning This equipment is intended for use...

Страница 6: ...vi...

Страница 7: ...le 2 4 2 7 Efficiency 2 5 2 8 Output Adjust 2 6 2 8 1 Variable Resistor Output Voltage Adjust 2 6 2 8 2 Variable Control Voltage Output Voltage Adjust 2 6 3 Board Layout 3 1 3 1 Layout 3 1 4 Schematic...

Страница 8: ...Running Title Attribute Reference viii 1 1 TPS61040 Performance Specification Summary 1 2 2 1 Input Output Connections 2 2 4 1 TPS61040EVM 001 Bill of Materials 4 2...

Страница 9: ...on This chapter contains background information for the TPS61040 and support documentation for the TPS61040EVM 001 evaluation module Topic Page 1 1 Background 1 2 1 2 Performance Specification Summary...

Страница 10: ...r R1 R2 The EVM can also be configured for higher or lower output currents For lower currents the TPS61040 may be replaced by the pin for pin compatible TPS61041 More information about output voltage...

Страница 11: ...PS61040EVM 001 This chapter also presents the test results for this EVM Topic Page 2 1 Input Output Connections 2 2 2 2 EVM Operation 2 2 2 3 Start Up 2 2 2 4 Output Voltage Ripple 2 3 2 5 Switching W...

Страница 12: ...JP1 Enable Use this connector to enable and disable the power supply Connect a jumper between the ON pin and the center pin to enable the supply and connect a jumper between the Off pin and the cente...

Страница 13: ...pple Figure 2 2 shows the output voltage ripple with IO 20 mA The top trace shows the ripple with 3 6 V input and the bottom trace shows the ripple with a 4 2 V input The difference in switching frequ...

Страница 14: ...ed energy to the load and the output capacitor When the inductor current decays to zero the SW node rings at a frequency determined by the output inductor and the drain capacitance of the internal FET...

Страница 15: ...nput Ripple Voltage Input Ripple Current 2 7 Efficiency Figure 2 5 shows the measured efficiency of the TPS61040 Figure 2 5 Typical Efficiency 80 81 82 83 84 85 86 87 88 89 90 2 5 5 7 5 10 12 5 15 17...

Страница 16: ...esired output voltage Radjust min 1 233 V R1 V O max 1 233 V 1 Radjust max 1 233 V R1 V O min 1 233 V 2 For example if VO max 19 V VO min 17 V and R1 2 21 M then R adjust min 153 4 k and R adjust max...

Страница 17: ...de power supplies Figures 3 1 3 2 and 3 3 show the board layout for the TPS61040EVM 001 PWB The nodes with high switching frequency are short and isolated from the noise sensitive feedback circuitry C...

Страница 18: ...Layout 3 2 Board Layout Figure 3 2 Top Layer Routing Figure 3 3 Bottom Layer Routing...

Страница 19: ...4 1 Schematic and Bill of Materials This chapter provides the TPS61040EVM 001 schematic and bill of materials Topic Page 4 1 Schematic 4 2 4 2 Bill of Material 4 2 Chapter 4...

Страница 20: ...ceramic 22 pF 50 V C0G 5 0603 1 Murata GRM1885C1H220JZ01 C3 Capacitor ceramic 1 F 25 V X7R 10 1206 1 Murata GRM31MR7E105KC01 D1 Diode Schottky 0 5 A 30 V SOD 123 1 On Semi MBR0530T1 J1 J5 Header 2 pin...

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