Related Manuals for Texas Instruments TPS65120EVM-076
Summary of Contents for Texas Instruments TPS65120EVM-076
- Page 1 TPS65120EVM 076/ TPS65124EVM 076 User’s Guide August 2004 PMP Portable Power SLVU112...
- 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 and 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 2004, Texas Instruments Incorporated...
- Page 5 Related Documentation From Texas Instruments Preface Read This First About This Manual This user’s guide describes the characteristics, operation, and use of the TPS65120EVM−076 and TPS65124EVM−076 evaluation modules (EVM). Included are EVM specifications, test results, schematic diagram, bill of materials (BOM), and recommended test setup.
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Page 7: Table Of Contents
Contents Contents Introduction ..............Background . - Page 8 Contents Figures 2−1 Main Output Efficiency vs Load Current ......... . 2−2 Main Output Ripple Voltage .
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Page 9: Introduction
Chapter 1 Introduction This chapter contains introductory information about the TPS65120EVM−076 and TPS65124EVM−076 evaluation modules. Topic Page Background ..........Performance Specifiction Summary . -
Page 10: Background
Background 1.1 Background The TPS65120EVM uses a TPS65120 single inductor, multichannel output IC to provide the three output voltages necessary to power amorphous silicon (a−Si) and low-temperature polysilicon (LTPS) TFT-LCD displays. The TPS65120 has integrated power−up/down sequencing and an auxiliary linear regulator providing an additional 3.3-V rail. - Page 11 Modifications More Current From VMAIN – An external linear regulator U3 (e.g., TPS79201) powered from BOOT and supporting passives, C14, C15, R17, and R19 can be added to provide more output current for VMAIN. The linear regulator data sheet provides guidance on sizing the supporting passives.
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Page 13: Evm Operation
Chapter 2 EVM Operation This chapter describes how to properly test the TPS65120 and TPS65124 using the TPS65120EVM and TPS65124EVM. Topic Page Input/Output Connections ........Test Setup . -
Page 14: Input/Output Connections
Input/Output Connections 2.1 Input/Output Connections The EVM’s input and output connections are described in the following paragraphs. J1-VIN − This header connects to the positive terminal of the input power supply. J2-GND − This header connects to the negative terminal of the input pow- er supply. -
Page 15: Test Setup
Test Setup 2.2 Test Setup Although the absolute maximum voltage for V is 6 V, the TPS6512x family is designed to operate with input voltages of 5.5 V or less. For best results with the EVM as packaged, connect a power supply with a 3.3-V output voltage and current limit set to at least 500 mA. -
Page 16: Main Output Ripple Voltage
Test Results Figure 2−2. Main Output Ripple Voltage V BOOT (50 mV/div), AC Coupled V MAIN (10 mV/div), AC Coupled V IN = 3.6 V, V MAIN = 5 V @ 20 mA, V GH = 12 V @ 200 mA, V GL = −12 V @ 200 mA t −... -
Page 17: Board Layout
Chapter 3 Board Layout The chapter describes the HPA076 PCB board layout and illustrations. Topic Page Board Layout ..........Board Layout... -
Page 18: Board Layout
Board Layout 3.1 Board Layout Board layout is critical for all switch mode power supplies. Figure 3−1, Figure 3−2, and Figure 3−3 show the board layout for the HPA076 PCB. The switching nodes with high-frequency noise are isolated from the noise- sensitive feedback circuitry and special attention has been given to the routing of high-frequency current loops as well as ground. -
Page 19: Top Layer Routing
Board Layout Figure 3−2. Top Layer Routing Figure 3−3. Bottom Layer Routing Board Layout... -
Page 21: Bill Of Materials And Schematic
Chapter 4 Bill of Materials and Schematic This chapter provides the TPS65120EVM and TPS65124EVM bill of materials and schematic. Topic Page Bill of Materials ..........Schematics . -
Page 22: Bill Of Materials
Bill of Materials 4.1 Bill of Materials Table 4−1. HPA076 Bill of Materials Count RefDes RefDes Description Description Size Size Part Number Part Number −001 −002 Capacitor, ceramic, 2.2−µF, 6.3−V, X5R, C1608X5R0J225KT Capacitor, ceramic, 0.47−µF, 16−V, X5R, C1608X5R1C474KT Capacitor, ceramic, 0.1−µF, 25−V, X7R, C1608X7R1E104KT Capacitor, ceramic, 0.22−µF, 16−V, X5R, 0603YD224KAT2A... -
Page 23: Schematic
Schematic Count RefDes RefDes Description Description Size Size Part Number Part Number −001 −002 IC, Single Inductor Quadruple−Output QFN16 TPS65120QFN TFT LCD Power Supply IC, Single Inductor Quadruple−Output QFN16 TPS65124QFN TFT LCD Power Supply IC, 100 mA Negative Output LDO Linear SOT23−5 TPS72301DBV Regulators... -
Page 24: Hpa076 Schematic
Schematic Figure 4−1. HPA076 Schematic... - Page 25 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPS65120EVM-076 TPS65124EVM-076...