Manuale d’uso / di manutenzione del prodotto TPS2151 del fabbricante 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.
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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.
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Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Texas Instruments TPS2151 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Texas Instruments TPS2151 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Texas Instruments TPS2151 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Texas Instruments TPS2151 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Texas Instruments TPS2151, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Texas Instruments TPS2151.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Texas Instruments TPS2151. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Texas Instruments TPS2151 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
