Instruction/ maintenance manual of the product TPS2151 Texas Instruments
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IMPORT ANT NOTICE T exas 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.
EVM IMPORT ANT NOTICE T exas 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 EV ALUA TION PURPOSES ONL Y and is not considered by TI to be fit for commercial use.
EVM W ARNINGS AND RESTRICTIONS It is important to operate this EVM within the specified input and output ranges described in the EVM User ’ s Guide. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.
How to Use This Manual v Preface About This Manual The TPS2151 is one of the four devices in the USB peripheral power management family TPS2140/41/50/51, which integrates both an adjustable linear low-drop voltage regulator (LDO) and a dual-current-limited power switch.
Information About Cautions and Warnings vi Information About Cautions and Warnings This book may contain cautions and warnings. This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment.
Contents vii 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Schematic, Bill of Materials, Layout, and Setup 2-1 . .
Contents viii.
1-1 Introduction Each device in TPS2140/41/50/51 family integrates a dual-current-limiting power switch and an adjustable low dropout regulator (LDO). Both the switch and LDO limit inrush current by controlling the turnon slew rate and are compatible with USB 1.
1-2.
2-1 Schematic, Bill of Materials, Layout, and Setup This chapter contains schematics, bill of materials, board layout, and setup of EVM.
Schematic of the EVM 2-2 2.1 Schematic of the EVM Figure 2 – 1 shows the schematic of the EVM. Figure 2 – 1. Schematic of the TPS2151 Evaluation Module (EVM) + + + +.
Schematic of the EVM 2-3 Schematic, Bill of Materials, Layout, and Setup Only C2, C4, C5, C6, C8, R2, and R3 are essential for the TPS2151 to function properly . The rest of the components on the EVM are used for dif ferent evaluations of the device. T o evaluate the power switch inrush current, a large capacitor C9 can be added on the EVM.
Bill of Materials 2-4 W arning Users must not activate the load on SW_OUT before the SW_PG rises to high, if the load current is higher than 50 mA. Otherwise, the power switch output could not be charged up to SW_IN rail. 2.2 Bill of Materials The bill of materials (BOM) for the EVM is shown in T able 2 – 1.
Layout of the EVM 2-5 Schematic, Bill of Materials, Layout, and Setup 2.3 Layout of the EVM Figure 2 – 2 illustrates the placement of the components on the top-layer of the TPS2151 EVM. All the components are placed on the top layer only . The bottom layer is mainly a ground plane except for a few short traces.
Layout of the EVM 2-6 2.4 Setup of the EVM Fo r proper operation of the EVM, please follow these steps for any evaluation: 1) V erify that the power supply voltages are in the required ranges: less than 5.5 V but higher than 4.1 V . Make sure the supplies have the capability to supply the current that the loads need.
3-1 Changeable Components and T est Points C1, C2, C3, C4 — input capacitors, at least 0.047 µ F total on each input. C5 , C6, C8, C9 — load capacitors, vary according to loads, but C5 plus C6 must be at least 4.
3-2.
An important point after buying a device Texas Instruments TPS2151 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Texas Instruments TPS2151 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Texas Instruments TPS2151 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Texas Instruments TPS2151 you will learn all the available features of the product, as well as information on its operation. The information that you get Texas Instruments TPS2151 will certainly help you make a decision on the purchase.
If you already are a holder of Texas Instruments TPS2151, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Texas Instruments TPS2151.
However, one of the most important roles played by the user manual is to help in solving problems with Texas Instruments TPS2151. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Texas Instruments TPS2151 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
