Related Manuals for Texas Instruments TPS54614EVM 1.8-V SWIFT
Summary of Contents for Texas Instruments TPS54614EVM 1.8-V SWIFT
- Page 1 TPS54614EVM, 1.8 V Swift Regulator Evaluation Module User’s Guide September 2001 PMP PD & PS SLVU053...
- Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
- Page 3 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...
- Page 4 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. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated...
- Page 5 Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. Trademarks SWIFT is a trademark of Texas Instruments.
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Page 7: Table Of Contents
Contents Contents Introduction ..............Background . - Page 8 Contents Figures 2–1 Test Setup Connection Diagram ..........2–2 Measured Efficiency .
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Page 9: Introduction
Chapter 1 Introduction This chapter contains background information for the TPS54614 and support documentation for the TPS54614 EVM evaluation module. The TPS54614 EVM performance specifications are given, as well as modification instructions if different preset output voltages are desired. Topic Page Background . -
Page 10: Background
For guidelines on selecting an output inductor and output capacitor for a specific application, refer to Texas Instruments application report SLVA105 – Designing With Internally Compensated SWIFTt Regulators. -
Page 11: Modifications
Modifications 1.3 Modifications The EVM can be modified for different preset output voltages by using other devices in the TPS5461x family. For output voltages less than 2.5 V, only U1 needs to be changed. For output voltages 2.5 V and higher, the output capacitor (C1) also needs to be changed. -
Page 13: Setup And Test Results
Chapter 2 Setup and Test Results This chapter describes how to properly connect, set up, and use the TPS54614 EVM. This chapter also presents the test results for the TPS54614, and covers efficiency, output voltage regulation, load transients, loop response, output ripple, and start-up. Topic Page Input/Output Connections... -
Page 14: Input/Output Connections
Input/Output Connections 2.1 Input/Output Connections The TPS54614 has the following four input/output connections: input, input return, output, and output return. A diagram showing the connection points is shown in Figure 2–1. Connect a power supply capable of supplying 5 A to J1 through a pair of 20 AWG wires. -
Page 15: Efficiency
Efficiency 2.2 Efficiency The TPS54614 efficiency peaks at around 1.5 A of load current. At a full 6-A load the efficiency drops to around 83% with a 5-V input source. The efficiency shown in Figure 2–2 is typical for an ambient temperature of 25°C. The efficiency is lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the MOSFETs. -
Page 16: Thermal Performance
Thermal Performance 2.3 Thermal Performance The plot in Figure 2–4 shows the junction temperature versus the load current at 25°C ambient temperature. The case temperature is plotted in Figure 2–5. The low junction-to-case thermal resistance of the PWP package, along with a good board layout, helps to keep the junction temperature low at high output currents. -
Page 17: Output Voltage Regulation
Output Voltage Regulation 2.4 Output Voltage Regulation The output voltage load regulation at 25°C is shown in Figure 2–6. The output voltage varies less than 0.3% over the entire input voltage range of 3.3 V to 5.0 V, and load range of 0 A to 6 A. Figure 2–6. -
Page 18: Load Transients
Output Voltage Regulation 2.5 Load Transients The TPS54614 EVM response to load transients is shown in Figure 2–7 and Figure 2–8. The load transient in Figure 2–7 transitions from 1.5 A to 4.5 A in 16 µs, while the load transient in Figure 2–8 transitions from 4.5 A to 1.5 A in 12 µs. -
Page 19: Loop Characteristics
Output Voltage Regulation 2.6 Loop Characteristics The loop gain and phase for a 5.0-V input and a 6.0-A load are shown in Figure 2–9 and Figure 2–10. The loop crossover frequency is approximately 50 kHz, and the phase margin is approximately 46°. Figure 2–9. -
Page 20: Output Voltage Ripple
Output Voltage Regulation 2.7 Output Voltage Ripple The output ripple voltage is plotted in Figure 2–11 for a 3.3-V input, and in Figure 2–12 for a 5.0-V input. The TPS54614 has a typical output voltage ripple of less than 15 mV Figure 2–11. -
Page 21: Input Voltage Ripple
Output Voltage Regulation 2.8 Input Voltage Ripple The input voltage ripple for a 6-A load is shown in Figure 2–13 for a 3.3-V input and in Figure 2–14 for a 5.0-V input. With a 5.0-V input, the ripple is approximately 260 mVpp. The input voltage ripple can be made lower by adding capacitance to the input. -
Page 22: Start-Up
Output Voltage Regulation 2.9 Start-Up The start-up voltage waveform of the TPS54614 EVM is shown in Figure 2–15. The TPS54614 output begins to rise when the input rises above the 3.0-V startup level. The output voltage then ramps linearly to 1.8 V in 3.6 ms. -
Page 23: Board Layout
Chapter 3 Board Layout This chapter provides the TPS54614 EVM board layout illustrations. Topic Page Layout ............Board Layout... -
Page 24: Layout
Layout 3.1 Layout The board layout for the TPS54614 EVM, shown in Figure 3–1 through Figure 3–4, resembles a layer stack-up encountered in a typical application. The top and bottom layers are 1.5 oz. copper, while the two internal layers are 0.5 oz. copper. -
Page 25: Top-Side Layout
Layout Figure 3–2. Top-Side Layout Board Layout... -
Page 26: Internal Layers Layout
Layout Figure 3–3. Internal Layers Layout... -
Page 27: Bottom Side Layout
Layout Figure 3–4. Bottom-Side Layout Board Layout... -
Page 29: Schematic And Bill Of Materials
Chapter 4 Schematic and Bill of Materials This chapter provides a schematic diagram and bill of materials for the TPS54614 EVM. Topic Page Schematic ........... . Bill of Materials . -
Page 30: Schematic
Schematic 4.1 Schematic Figure 4–1. EVM Schematic TPS54614PWP FSEL SS/ENA Enable 10 µF 220 µF PWRGD VBIAS 0.1 µF PWRGD 10 kΩ 7.2 µH VSENSE BOOT 0.047 µF PGND PGND PGND 680 µF AGND PGND PGND PwrPad Optional... -
Page 31: Bill Of Materials
Bill of Materials 4.2 Bill of Materials Table 4–1. TPS54614 EVM Bill of Materials Count Ref Des Description Size Part Number Capacitor, POSCAP, 680-µF, 2.5-V, 7343 (D) Sanyo 2R5TPB680M 40-mΩ, 20% Capacitor, ceramic, 0.047-µF, 25-V, Murata GRM39X7R473K25 X7R, 10% Murata GRM39X7R104K25 Capacitor, ceramic, 0.1-µF, 25-V, X7R, 10%... - Page 33 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS54614EVM-183...
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