! !" User’s Guide July 2003 PMP Portable Power SLVU089
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 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 About This Manual This user’s guide describes the operation of the TPS6204xEVM low-power dcdc evaluation module for high-efficiency, step-down converters.
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Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 EVM Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Evaluation With the TPS6204xEVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1 Enable (EN) Jumper . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 The Texas Instruments TPS62040 and TPS62046 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 TPS6204xEVMs are available as the TPS62040 adjustable version set to 1.8 V and the TPS62046 3.3-V fixed version. The TPS62040EVM is easily set up to provide any output voltage between 0.
EVM Ordering Information 1.1 EVM Ordering Information Table 1−1. EVM Ordering Information EVM Number 1-2 Description TPS62040EVM−229 Adjustable output voltage version set to 1.8 V TPS62046EVM−229 3.
Chapter 2 !" This chapter details the evaluation process and features of the EVM. For this purpose, a load is connected to the output pins VO and GND, which allows the load current to be adjusted between 0 A and 1.2 A. 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 ENABLE enables the part. Connecting the EN pin to DISABLE disables the device. 2.2 Mode Selection Jumper This jumper is used to choose between PWM and PFM/PWM modes of operation. Setting the jumper across FIXED FREQ forces the device into the low noise fixed frequency pulse width modulation (PWM) mode.
Chapter 3 # $ % & #'"& ( 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. A bill of materials and a schematic are provided. Topic Page 3.1 SLVP229 EVM Schematic 3-2 3.2 BIll of Materials 3-3 3.
SLVP229EVM Schematic 3.1 SLVP229EVM Schematic Figure 3−1 shows the SLVP229 EVM schematic diagram. The bill of materials for the TPS62040EVM and TPS62046EVM is shown in Table 3−1. More details about the design and component selection for the dc-dc converter are found in the data sheet. Figure 3−1. TPS62040EVM and TPS62046EVM (SLVP229) Schematic J1 VIN 1 JP1 1 2 U1 TPS6204xDGQ 1 PGND EN 2 VIN PGND 3 SW VIN 4 SW AGND 5 FB PWPMOD C3 22 µF L1 1 6.
TPS62040EVM and TPS62046EVM (SLVP229) Bill of Materials 3.2 TPS62040EVM and TPS62046EVM (SLVP229) Bill of Materials Table 3−1. TPS62040EVM and TPS62046EVM (SLVP229) Bill of Materials QUANTITY TPS62040 TPS62046 2 2 Ref Des DESCRIPTION SIZE MFR PART NUMBER C3, C4 Capacitor, ceramic, 22 µF, 6.
PCB Layout of the TPS62040EVM and TPS62046EVM 3.3 PCB Layout of the TPS62040EVM and TPS62046EVM Figure 3−2, Figure 3−3, and Figure 3−4 show the layout for the adjustable and fixed output voltage EVMs. Figure 3−2. Component Placement Figure 3−3. Top Layer Figure 3−4.
