TPS62203EVMĆ211, TPS62200EVMĆ211 User’s Guide July 2002 PMP Portable Power SLVU069
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.
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.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2.5 V to 6 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
How to Use This Manual Preface Read This First About This Manual This users guide describes the characteristics, operation, and use of the TPS62200EVM-211 and TPS62203EVM-211 evaluation modules (EVM). These EVMs contain Texas Instruments high-efficiency buck converters that are configured to provide a regulated 3.3-V and 1.8-V output voltage and up to 300 mA of current. The users guide includes a schematic diagram, bill of materials (BOM), and test data.
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Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Performance Specification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Figures 2–1 3–1 3–2 3–3 4–1 4–2 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top Assembly Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top Layer Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom Layer Routing . . . . . . . . . . . . . . . . .
Chapter 1 Introduction This chapter contains background information for the TPS62200EVM–211 and TPS62203EVM–211 evaluation modules. Topic Page 1.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Performance Specification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.3 Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Background 1.1 Background This TPS6220XEVM uses a TPS6220X buck converter to step down 2.5-V or higher input voltages. This EVM operates over an input voltage range of 2.5 V to 6 V. The goal of the EVM is to demonstrate the small size of the TPS6220X power supply solution and provide flexibility in interchanging the supporting passive components. The TPS62203EVM uses a TPS62203 fixed 3.3-V output buck converter.
Chapter 2 Setup and Test Results This chapter describes how to properly connect, setup, and use the TPS6220XEVM. Topic Page 2.1 Input/Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 EVM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input/Output Connect 2.1 Input/Output Connect Figure 2–1 highlights the key connection points of the TPS6220XEVM. These connection points are described in the following paragraphs. 2.1.1 J1–Vin This is the positive connection to the input power supply. The leads to the input supply should be twisted and kept as short as possible. 2.1.2 J2–GND This is the return connection to the input power supply. 2.1.3 JP1–Enable This is the enable pin of the device.
EVM Operation 2.2 EVM Operation As shown in Figure 2–1, an input power supply and a load must be connected to the appropriate EVM connectors in order for the EVM to operate. The absolute maximum input voltage is 7 V. The TPS6220X is designed to operate with a maximum input voltage of 6 V. Short pins 1–2 on jumper J1 (labeled ON) to enable the device. Connect a load not to exceed 300 mA to the output of the EVM. Figure 2–1. Connection Diagram Power Supply 2 CH2 CH3 CH4 Load – CH1 + 5.
Chapter 3 Board Layout This chapter provides the TPS6220XEVM board layout and illustrations. Topic 3.1 Page Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout 3.1 Layout Board layout is critical for all switch mode power supplies. Figures 3–1, 3–2, and 3–3 show the board layout for the SLVP211 PWB. The switching nodes with high frequency noise are isolated from the noise sensitive feedback circuitry and careful attention has been given to the routing of high frequency current loops. Refer to the data sheet for specific layout guidelines. Figure 3–1. Top Assembly Layer Figure 3–2.
Layout Figure 3–3.
Chapter 4 Bill of Materials and Schematics This chapter provides the TPS6220XEVM-211 bill of materials and schematics. Topic Page 4.1 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.2 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bill of Materials 4.1 Bill of Materials Table 6–1. Bill of Materials –001 –002 RefDes 1 1 0 0 1 Description Size MFR Part Number C1 Capacitor, ceramic, 4.7 µF, 6.3 V, X5R, 20% 805 Murata GRM21BR60J475KA11 C2 Open 805 C3 Capacitor, ceramic, 33 pF, 50 V, C0G, 5% 603 Murata GRM1885C1H330CZ01 TDK C2012X5R0J106M 0 Open 603 1 1 C4 Capacitor, ceramic, 10 µF, 6.
Schematics 4.2 Schematics Figure 4–1. TPS62200 Schematic J1 Vin 1 2 J2 GND C1 4.7 µF C2 1 U1 TPS62200DBV 5 1 VIN SW 2 GND 3 4 EN FB L1 10 µH 1 R1 475 kΩ R2 182 kΩ 2 C5 1 C6 100 pF 1 JP1 EN 1 Vout = 1.8 V 2 C3 33 pF C4 10 µF 1 J3 J4 GND 2 User Defined Figure 4–2. TPS62203 Schematic J1 Vin 2 J2 GND 1 1 2 JP1 EN 1 User Defined 2 Open C1 4.7 µF C2 1 U1 TPS62203DBV 1 5 VIN SW 2 GND 3 4 EN FB L1 10 µH 1 R1 0 R2 2 Vout = 3.
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