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Summary of Contents for Texas Instruments TPS54110EVM-044
- Page 1 TPS54110EVM 044 1.5 Amp SWIFTE Regulator Evaluation Module User’s Guide December 2003 PMP Systems Power SLVU102...
- Page 2 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 & application solutions:...
- 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 of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
- 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 2003, Texas Instruments Incorporated...
- Page 5 Operation of this equipment in other en- vironments 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 and PowerPAD are trademarks of Texas Instruments.
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Page 6: Table Of Contents
Contents Contents Introduction ..............Background . - Page 7 ........1−2 TPS54110EVM-044 Performance Specification Summary ......
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Page 8: Introduction
Chapter 1 Introduction This chapter contains background information for the TPS54110 with support documentation for the TPS54110EVM-044 evaluation module (HPA044). The TPS54110EVM-044 performance specifications are provided, along with a schematic and bill of material. Topic Page Background .......... -
Page 9: Background
Background 1.1 Background The TPS54110 dc/dc converter is designed to provide up to 1.5-A output from a 3-V to 6-V input voltage source. Rated input voltage and output current range is given in Table 1−1. This evaluation module is designed to demonstrate the small PCB areas that may be achieved when designing with the TPS54110 regulator, and does not reflect the high efficiencies that may be achieved when designing with this part. -
Page 10: Performance Specification Summary
Performance Specification Summary 1.2 Performance Specification Summary A summary of the TPS54110EVM-044 performance specifications is provided in Table 1−2. Specifications are given for an input voltage of 3.3 V and an output voltage of 1.5 V unless otherwise specified. The ambient temperature is 25_C for all measurements, unless otherwise noted. -
Page 11: Modifications
Modifications 1.3 Modifications The TPS54110EVM−044 is designed to demonstrate the small size that can be attained when designing with the TPS54110; therefore, many of the features, which allow for extensive modifications, have been omitted from this EVM. For reference designators, see the schematic in Figure 4−1. 1.3.1 Output Voltage Set Point Changing the value of R2 can change the output voltage in the range of 0.9 V... -
Page 12: Test Setup And Results
Chapter 2 Test Setup and Results This chapter describes how to properly connect, set up, and use the TPS54110EVM−044 evaluation module. The chapter also includes test results typical for the TPS54110EVM−044 and covers efficiency, output voltage regulation, load transients, loop response, output ripple, input ripple, and startup. -
Page 13: Input/Output Connections
Input/Output Connections 2.1 Input/Output Connections The TPS54110EVM−44 has the following two input/output connectors: V (J1), and V (J2). A diagram showing the connection points is shown in Figure 2−1. A power supply capable of supplying 3 A should be connected to J1 through a pair of 20 awg wires. -
Page 14: Efficiency
Efficiency 2.2 Efficiency The TPS54110EVM−44 efficiency peaks at load current of about 0.5 A to 0.75 A, and then decreases as the load current increases towards full load. Figure 2−2 shows the efficiency for the TPS54110 at an ambient temperature of 25_C. -
Page 15: Power Dissipation
Power Dissipation 2.3 Power Dissipation The low junction-to-case thermal resistance of the PWP package, along with a good board layout, allows the TPS54110EVM−044 EVMs to output full-rated load current while maintaining safe junction temperatures. With a 3.3-V input source and a 1.5-A load, the junction temperature is approximately 60°C wheras the case temperature is approximately 55°C. -
Page 16: Output Voltage Regulation
Output Voltage Regulation 2.4 Output Voltage Regulation The output voltage load regulation of the TPS54110EVM−044 is shown in Figure 2−4; the output voltage line regulation is shown in Figure 2−5. Measurements are given for an ambient temperature of 25°C. Figure 2−4. Load Regulation OUTPUT VOLTAGE OUTPUT CURRENT 0.08... -
Page 17: Load Transients
Load Transients 2.5 Load Transients The TPS54110EVM−044 response to load transients is shown in Figure 2−6. The current step is from 25% to 75% of maximum rated load. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. -
Page 18: Loop Characteristic
Loop Characteristic 2.6 Loop Characteristic The TPS54110EVM−044 loop response characteristics are shown in Figure 2−7 and Figure 2−8. Gain and phase plots are shown for each device at minimum and maximum operating voltage. Figure 2−7. Measured Loop Response, TPS54110, V = 3 V MEASURED LOOP RESPONSE Phase... -
Page 19: Output Voltage Ripple
Output Voltage Ripple 2.7 Output Voltage Ripple The TPS54110EVM−044 output voltage ripple is shown in Figure 2−9. The input voltage is 3.3 V for the TPS54110. Output current is the rated full load of 1.5 A. Voltage is measured directly across output capacitors. Figure 2−9. -
Page 20: Powering Up
Powering Up 2.9 Powering Up The TPS54110 regulator provides an internal slow-start circuit to ramp the output voltage up at a steady rate. When the input voltage reches the UVLO start up threshold, the output begins to ramp up at the internally set rate until the final output set point is reached. - Page 21 2-10...
- Page 22 Chapter 3 Board Layout This chapter provides a description of the TPS54110EVM−044 board layout and layer illustrations. Topic Page Layout ............Board Layout...
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Page 23: Top Side Layout
Layout 3.1 Layout The board layout for the TPS54110EVM−044 is shown in Figure 3−1 through Figure 3−3. The top side layer of the TPS54110EVM−044 is laid out in a manner typical of a user application that is optimized for small size. A small footprint Coilcraft DO3314−103MX inductor and 0805 10-µF ceramic capacitor are used in the output filter. -
Page 24: Bottom Side Layout
Layout Figure 3−2. Bottom Side Layout Figure 3−3. Top Side Assembly Board Layout... - Page 25 Chapter 4 Schematic and Bill of Materials The TPS54110EVM−044 schematic and bill of materials are presented in this chapter. Topic Page Schematic ........... . Bill of Materials .
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Page 26: Tps54110Evm-044 Schematic
Schematic 4.1 Schematic The schematic for the TPS54110EVM−044 is shown in Figure 4−1. Figure 4−1. TPS54110EVM-044 Schematic PWRGD 10 k 560 pF 432 W OPEN TPS54110PWP 71.5 k 1000 pF 1.74 k AGND VSENSE SYNC 10 k COMP SS/ENA 47 pF PWRGD 14.7 k... -
Page 27: Tps54110Evm-044 Bill Of Materials
Bill of Materials 4.2 Bill of Materials The bill of materials for the TPS54110EVM−044 is given by Table 4−1. TPS54110EVM-044 Bill of Materials Count Ref Des Description Size Part Number Capacitor, POSCAP, xx µF, xx V, 20% − 7343 (D)
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