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This User's Guide describes the characteristics, operation, and use of the
TPS62351EVM-122 Evaluation Module (EVM). This EVM demonstrates the Texas
Instruments TPS62351 800 mA, 3 MHz, synchronous, step down converter with I
interface. This User's Guide includes setup instructions, a schematic diagram, a bill of
materials (BOM), and PCB layout drawings for the evaluation module.
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SLVU186 - October 2006
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User's Guide
SLVU186 - October 2006
TPS62351EVM
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Summary of Contents for Texas Instruments TPS62351EVM
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Page 1: Table Of Contents
SLVU186 – October 2006 TPS62351EVM This User’s Guide describes the characteristics, operation, and use of the TPS62351EVM-122 Evaluation Module (EVM). This EVM demonstrates the Texas Instruments TPS62351 800 mA, 3 MHz, synchronous, step down converter with I C™ interface. This User’s Guide includes setup instructions, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the evaluation module. -
Page 2: Introduction
C™ signal to the TPS62351 EVM board. 1.1.4 Software Texas Instruments has provided software to assist the user in evaluating this EVM. The software can be installed from the supplied CD or downloaded from the web at www.ti.com. Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup, and use the TPS62351EVM-122. - Page 3 TPS62351. The Texas Instruments USB Interface Adapter provides an active pull up so no jumper should be installed when using the adapter supplied with the EVM. SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback...
- Page 4 C™ master has its own pull up or operates from a voltage that is different than the input voltage of the TPS62351. The Texas Instruments USB Interface Adapter provides an active pull up so no jumper should be installed when using the adapter supplied with the EVM.
- Page 5 Connect the USB Interface Adapter to the host computer using the supplied USB cable. Connect the desired converter on the TPS62351EVM board to the USB Interface Adapter using the supplied 10 pin ribbon cable. The connectors on the ribbon cable are keyed to prevent incorrect installation.
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Page 6: Operation
Figure 1. Quick Connection Diagram USB Interface Adapter Connect an input voltage supply to the TPS62351EVM board. The TPS62351 uses an input voltage between 2.7 V and 5.5 V. Connect the positive input voltage to J1 for converter 1 or J4 for converter 2. -
Page 7: Output Controls Tab
This can be used to avoid inadvertently selecting output voltages, in the output voltage pull down boxes, that are too high for the application being tested. SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... -
Page 8: Preferences Tab
Write button that will only update the register that is displayed next to it. The Write To All Registers button will update all four registers with one push. TPS62351EVM SLVU186 – October 2006 Submit Documentation Feedback... -
Page 9: Test Results
Test Results Test Results This section provides typical performance waveforms for the TPS62351EVM-122 board. SCL pin 1.0V/div 500mV/div VOUT Measure P1. . . P2freq(C1) P3. . . P4. . . P5. . . P6. . . 114.295 kHz value... -
Page 10: Output Ripple
Measure 2.93117 kHz value status 100ns/div Vin=3.6V VOUT=1.1V X1 = 80.499 s X = 0 ns X2 = 80.499 s 1/ X = --- Iout=550mA 8/25/2006 9:40:53 AM Figure 5. Output Ripple TPS62351EVM SLVU186 – October 2006 Submit Documentation Feedback... -
Page 11: Load Transient, 0 Ma To 680 Ma Step
VOUT=1.50 X1 = 134.7995 s X = 0.0 ns X2 = 134.7995 s 1/ X = VSEL=High, Forced PWM 8/25/2006 10:05:32 AM Figure 6. Load Transient, 0 mA to 680 mA Step SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... -
Page 12: Board Layout
Figure 11show the board layout for the TPS62351EVM-122 PWB. The nodes with high switching frequencies and currents are kept as short as possible to minimize trace inductance. Careful attention has been given to the routing of high frequency current loops and a single point grounding scheme is used. See the data sheet for the specific layout guidelines. -
Page 13: Assembly Layer
Board Layout Figure 8. Assembly Layer SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... -
Page 14: Top Layer Routing
Board Layout Figure 9. Top Layer Routing TPS62351EVM SLVU186 – October 2006 Submit Documentation Feedback... -
Page 15: Bottom Layer Routing
Board Layout Figure 10. Bottom Layer Routing SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... -
Page 16: Layer 2 Routing
Board Layout Figure 11. Layer 2 Routing TPS62351EVM SLVU186 – October 2006 Submit Documentation Feedback... -
Page 17: Layer 3 Routing
Board Layout Figure 12. Layer 3 Routing SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... -
Page 18: Schematic And Bill Of Materials
Schematic and Bill of Materials Schematic and Bill of Materials This section provides the TPS62351EVM-122 schematic and bill of materials. Schematic Figure 13. TPS62351EVM-122 Schematic TPS62351EVM SLVU186 – October 2006 Submit Documentation Feedback... -
Page 19: Hpa122A Bom
IC, 3MHz Synchronous Step Down Converter QFN-12 TPS62351YZG with I C 800mA PCB, 4.15 In x 3.45 In x 0.062 In HPA122 Shunt, 100 mil, Black 0.100 929950-00 Related Documentation From Texas Instruments TPS62351 data sheet (SLVS540) SLVU186 – October 2006 TPS62351EVM Submit Documentation Feedback... - Page 20 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
- Page 21 TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products...
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