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Summary of Contents for Texas Instruments TPS54386EVM
- Page 1 Using the TPS54386EVM User's Guide March 2008 Power Supply MAN SLUU286...
- Page 2 Using the TPS54386EVM User's Guide Literature Number: SLUU286 March 2008...
- Page 3 TPS54386EVM is designed to use a regulated 12-V (+10% / -20%) bus to produce two regulated power rails, 5.0 V and 3.3 V at up to 2 A of load current each. TPS54386EVM is designed to demonstrate the TPS54386 in a typical 12-V bus system while providing a number of test points to evaluate the performance of the TPS54386 in a given application.
- Page 4 TPS54386EVM Electrical Performance Specifications TPS54386EVM Electrical Performance Specifications Table 1. Electrical Performance Specifications SYMBOL PARAMETER UNITS Input Characterstics Input coltage 13.2 Input current = nom, I = max No load input current = nom, I = 0 A Input UVLO...
- Page 5 Schematic Schematic Figure 1. TPS54386EVM Schematic Note: For reference only, see Table 3, List of Materials for specific values. SLUU286 – March 2008 A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter Submit Documentation Feedback...
- Page 6 Schematic Sequencing Jump (JP3) The TPS54386EVM provides a 3-pin, 100-mil header and shunt for programming the TPS54386’s sequencing function. Placing the JP3 shunt in the left position connects the sequence pin to BP and sets the TPS54386 controller to sequence Channel 2 prior to Channel 1 when Enable 2 is activated. Placing the JP3 shunt in the right position connects the sequence pin to GND and sets the TPS54386 converter to sequence Channel 1 prior to Channel 1 when Enable 1 is activated.
- Page 7 3.3.1 Input Voltage Monitoring (TP1 and TP2) TPS54386EVM provides two test points for measuring the voltage applied to the module. This allows the user to measure the actual module voltage without losses from input cables and connectors. All input voltage measurements should be made between TP1 and TP2. To use TP1 and TP2, connect a voltmeter positive terminal to TP1 and negative terminal to TP2.
- Page 8 www.ti.com 4 Test Set Up 4 Test Set Up Equipment 4.1.1 Voltage Source VIN: The input voltage source (VIN) should be a 0-15 V variable dc source capable of 5 A . Connect VIN to J1 as shown in Figure 4.1.2 Meters •...
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Page 9: Equipment Setup
Equipment Setup Shown in Figure 2 is the basic test set up recommended to evaluate the TPS54386EVM. Please note that although the return for J1, J2 and JP3 are the same system ground, the connections should remain separate as shown in Figure 2 4.2.1... - Page 10 www.ti.com 4 Test Set Up Metal Ground Barrel Probe Tip TP3 / TP4 / TP18 TP19 Tip and Barrel Vout ripple measurement Figure 3. Tip and Barrel Measurement Technique (output ripple measurement using TP3 and TP4 or TP18 and TP19) LOAD2 3.3V @ LOAD1...
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Page 11: Start Up / Shut Down Procedure
www.ti.com 4 Test Set Up Start Up / Shut Down Procedure 1. Increase VIN from 0 V to 12 V 2. Vary LOAD1 from 0 – 2 A 3. Vary LOAD2 from 0 – 2 A 4. Vary VIN from 9.6 V to 13.2 V 5. - Page 12 TPS54386EVM Typical Performance Data and Characteristic Curves Figure 5 through Figure 9 present typical performance curves for the TPS54386EVM. Since actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements. Efficiency EFFICIENCY(V = 3.3 V)
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Page 13: Line And Load Regulation
1.24 1.62 2.00 - Load Current - A - Load Current - A LOAD LOAD Figure 6. TPS54386EVM Output Voltage verse Load Current V =9.6-13.2 V, V = 5.0 V I = 0-2 A, OUT1 OUT1 = 3.3 V I... - Page 14 -135 -180 1000 1000 f - Frequency - Hz f - Frequency - Hz Figure 9. TPS54386EVM Gain and Phase vs Frequency A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter SLUU286 – March 2008 Submit Documentation Feedback...
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Page 15: Evm Assembly Drawings And Layout
Figure 12) show the design of the TPS54386EVM printed circuit board. The EVM has been designed using a 4-Layer, 2-oz copper-clad circuit board 3.0” x 3.0” with all components in a 1.15” x 2.15” active area on the top side and all active traces to the top and bottom layers to allow the user to easily view, probe and evaluate the TPS54386 control device in a practical double-sided application. - Page 16 EVM Assembly Drawings and Layout Figure 11. TPS54386EVM Top Copper (viewed from top) A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter SLUU286 – March 2008 Submit Documentation Feedback...
- Page 17 EVM Assembly Drawings and Layout Figure 12. TPS54386EVM Bottom Copper (x-ray view from top) SLUU286 – March 2008 A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter Submit Documentation Feedback...
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Page 18: List Of Materials
List of Materials List of Materials Table 3. TPS54386EVM List of Materials REF DES DESCRIPTION PART NUMBER Capacitor, aluminum, 25 V, 20%, 100 µF, 0.328 x Panasonic EEEFC1E101P 0.390 inch Capacitor, ceramic, 25 V, X5R, 20%, 10 µF, 1210... -
Page 19: Important Notice
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 20 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS54386EVM...
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