TPS65132BEVM

This user's guide describes the characteristics, operation, and use of the TPS65132B evaluation module (EVM) and its software. It includes the EVM specifications, the recommended setup (hardware and software), the schematic diagram, the board layouts, and the bill of materials.

All the measurements in the Application Performance section of the TPS65132B datasheet (SLVSBM1) were done with this EVM.

1 Introduction

This EVM uses a TPS65132B to generate the positive and negative supply voltages needed by LCD panels in smartphones and tablet PCs. It can also be used as a general-purpose power supply in applications that need positive and negative supply rails (for example, op-amp or data acquisition circuits).

For easy performance evaluation of the TPS65132B, this EVM has:

• Software with a Graphical User Interface (GUI) for reading, writing, exporting, and importing the device configuration

• A USB2ANY interface adapter to control the I 2C bus

• Test points for measuring the most important voltages

• Jumpers for enabling and disabling the outputs

• Input and output voltage sense terminals for making accurate four-terminal voltage measurements

1.1 Recommended Equipment

In addition to the contents of the EVM box, some or all of the equipment described in the following subsections is required.

1.1.1 Power Supply

To evaluate the full performance of the TPS65132B, a dc power supply capable of delivering 1.2 A from 2.5 V to 5.5 V is required.

1.1.2 Host Computer

To change the output voltages or configuration of the TPS65132B, a personal computer (PC) with the following minimum specifications is needed:

• Microsoft® Windows® 7 operating system

• One free USB port

• A minimum of 280MB of free hard disk space (610MB recommended)

• A minimum of 512MB of RAM

1.1.3 Software

You can download the latest version of the EVM software from the TI website at http://www.ti.com/product/tps65132 (see also Section 5.2).

1.2 Applications

The TPS65132B device is suitable for use in any applications that need positive and negative output voltages in the range ±4 V to ±6 V and output currents less than ±80 mA. Typical applications include:

• Smartphone displays

• Tablet displays

• Split-rail power supply applications

1.3 Features

• Efficiency greater than 85% at IO > 10 mA

• Input voltage range of 2.5 V to 5.5 V

• Positive output voltage range of 4.0 V to 6.0 V (0.1-V steps)

• Negative output voltage range of –4.0 V to –6.0 V (0.1-V steps)

• Output voltage accuracy of better than 1%

• Programmable active discharge during shutdown

• Excellent line regulation

• Advanced power-save mode for light-load efficiency