! User’s Guide February 2003 PMP EVMs SLVU081
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 2.7 V to 10 V and the output voltage range of 0.7 V and 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.
Related Documentation From Texas Instruments Preface Read This First About This Manual This user’s guide describes the operation of the TPS6205xEVM low-power, dc-dc evaluation module for high-efficiency, step-down converters.
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Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 EVM Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Evaluation With the TPS6205xEVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Enable (EN) Jumper . . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 Introduction The Texas Instruments TPS62050 and TPS62052 evaluation modules (EVM) for low-power, high-efficiency, step-down converters help designers evaluate these devices. The EVMs make it possible to evaluate different modes of the devices as well as the device performance. The TPS6205xEVM is available as the TPS62050 adjustable version set to 3.3 V and the TPS62052 1.5-V fixed version. The TPS62050EVM can be easily set up to provide any output voltage between 0.
EVM Ordering Information 1.1 EVM Ordering Information Table 1–1. EVM Ordering Information 1-2 EVM Number Description TPS62050EVM–234 Adjustable output voltage version set to 3.3 V TPS62052EVM–234 1.
Chapter 2 Evaluation With the TPS6205xEVM This chapter details the evaluation process and features of the EVM. For this purpose, a load is connected to the output pins Vout and GND, which allows the load current to be adjusted between 0 mA and 800 mA. For accurate output voltage and input voltage measurements, it is important to measure the voltage on the input and output voltage terminals with a voltmeter connected directly to the input voltage or output voltage terminals.
Enable (EN) Jumper 2.1 Enable (EN) Jumper This jumper is used to enable the device. Connecting the EN pin to ON enables the part. Connecting the EN pin to OFF disables the device. 2.2 Synchronization (SYNC) Jumper This jumper is used to choose between PWM and PFM/PWM modes of operation. Setting the jumper across PWM forces the device into the low-noise fixed-frequency pulse width modulation (PWM) mode.
Chapter 3 PCB Layout As for all switch mode power supplies, the PCB layout is a very important step in the power supply design process. The following figures show the layout for the adjustable and fixed output voltage EVMs. Topic Page 3.1 SLVP234 EVM Schematic and Bill of Materials . . . . . . . . . . . . . . . . . . . 3-2 3.2 PCB Layout of the TPS62050EVM and TPS62052EVM . . . . . . . . . . . .
SLVP234 EVM Schematic and Bill of Materials 3.1 SLVP234 EVM Schematic and Bill of Materials Figure 3–1 shows the SLVP234 EVM schematic diagram. The bill of materials for the TPS62050EVM and TPS62052EVM is shown in Table 3–1. More details about the design and component selection for the dc-dc converter can be found in the data sheet. Figure 3–1. TPS62050EVM and TPS62052EVM (SLVP234) Schematic C1 R1 130 kΩ 10 µF L1 10 µH C2 R3 R5 R6 C4 C5 22 µF 4.7 µF R2 100 kΩ C3 R4 Table 3–1.
SLVP234 EVM Schematic and Bill of Materials Table 3–1. TPS62050 and TPS62052 EVMs (SLVP234) Bill of Material (Continued) Count Ref TPS62050 TPS62052 Des Description Size MFR Part Number 1 open R4 Resistor, chip, 100 kΩ, 1/16 W, 1% 603 Std Std 1 1 R5 Resistor, chip, 1.00 MΩ, 1/16 W, 1% 603 Std Std 1 1 R6 Resistor, chip, 1.00 MΩ, 1/16 W, 1% 603 Std Std U1 IC, high-efficiency step-down converter, Adj V DGS10 TI TPS62050DGS IC, high-efficiency step-down converter, 1.
PCB Layout of the TPS62050EVM and TPS62052EVM 3.2 PCB Layout of the TPS62050EVM and TPS62052EVM The figures below show the layout for the adjustable and fixed output voltage EVMs. Figure 3–2. Component Placement Figure 3–3.
PCB Layout of the TPS62050EVM and TPS62052EVM Figure 3–4.
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