Application notes from Texas Instruments

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Application Notes from Texas Instruments

Sensorless-FOC With Flux-Weakening and MTPA for IPMSM Motor Drives

The interior permanent-magnet synchronous motor (IPMSM) for variable speed applications became popular with the sensorless Field Oriented Control (FOC) technique in industrial and automotive systems because of high power density high efficiency and fast dynamic performance. This application report describes how to implement a flux-weakening logic and maximum torque per ampere (MTPA) logic in an I

Robust Isolated RS-485 enables new industrial applications

Texas Instruments

RS-485 is one of the most widely used wired interface for industrial long-haul networks. TIA/EIA-485-A standard defines the physical layer of the RS-485 interface. End applications use RS-485 interface coupled with protocol such as Profibus, Modbus or BACnet.

The main benefits of this interface include:

Balanced differential signaling allows for rejection of common mode noise and facilitates communications over long distances in noisy industrial environments.
Support of -7 to 12V wide common mode range allows for multipoint data transmission between nodes located at different ground potential difference.
Data rates up to 50 Mbps at short distances or communications distance up to 1000 meters at slower data rates is possible.

Applications for RS-485 include Energy Meters, Grid Protection relay, Solar inverter, Factory automation, Motor control and Heating, ventilation, air conditioning (HVAC) systems.

Two-channel, K-type thermocouple measurement circuit with internal temperature

Texas Instruments

This cookbook design describes a temperature measurement circuit with two thermocouples using the ADS1118. Thermocouple voltage measurements are made with the ADS1118 internal voltage reference, while cold-junction compensation (CJC) measurements are made with the onboard temperature sensor. Two channels of the ADC are used for two K-type thermocouples with a temperature measurement range from –270°C to 1370°C. Included in this design are ADC register settings to configure the device and pseudo code is provided to configure and read from the device. This circuit can be used in applications such as analog input modules for PLCs, lab instrumentation, and factory automation.

Inverting Application for the LMZM33604/6

Texas Instruments

The LMZM33606 is a 16 × 10 mm2 6-A rated synchronous step-down power module that features a wide operating input range from 3.5 V to 36 V with adjustable output voltage range from 1 V to 20 V. The LMZM33606 can be configured in an inverting buck-boost (IBB) topology with the output voltage inverted or negative with respect to input voltage. This application report shows how the conventional non-inverting evaluation board for the LMZM33606 can be configured for an inverting application. This application note also provides the additional level-shifter circuitry for EN and PGOOD pin if the feature is required. Note that the LMZM33604 is rated for 4A and pin-to-pin compatible with the LMZM33606.

AN-1192 Overture Series High Power Solutions (Rev. B)

Texas Instruments

This application report discusses the different aspects of the Overture series high-power solutions anddiscusses three application circuits: parallel bridged and bridged/parallel configurations.

Accessing and Writing to the TMS320C2xx I/O Memory Mapped Registers

Texas Instruments

The TMS320C2xx generation from Texas Instruments brings the power of digital signal processing to designers of high performance cost sensitive emerging applications. Combining high performance with ultra-low cost the 'C2xx generation offers the most optimal balance of price and performance of any DSP in the industry.

Using CodeSizeTune to Optimize your Application's Performance and Code Size

Texas Instruments

Today, DSP developers often find it difficult and time consuming to find the compiler options that optimize both speed performance and code size. In most cases, when performance increases, so does cod

A Powerline Communication Line Driver Requirement Overview

Texas Instruments

This application note describes some of the requirements for successful powerline communications starting with the media and progressing towards more detailled specifications of the amplifier. The goal of this report is to increase the reader's understanding of the physics of the media and the line driver and to describe the corresponding implications for both the line driver and the overall sy

TPS6031x Evaluation Using the TPS6030xEVM

Texas Instruments

This application report describes how to evaluate a TPS6031x device using the TPS6030x EVM.

Advanced Linear Repeater Used in PCIe 3.0 Add-in Card Compliance Environment

Texas Instruments

This report summarizes the results of PCIe Gen 3.0 add-in card compliance testing using TI’s low-power 12.5 Gbps 8-channel advanced linear repeater. The advanced linear repeater is placed in a mid-channel configuration between a PCIe Gen 3.0 graphics card and a compliance base board (CBB) and tested for jitter eye mask and TX preset compliance. The results demonstrate the excellent signal condit

AN053 Measuring Power Consumption With CC2430 and Z stack

Texas Instruments

AN053 -- Measuring power consumption with CC2430 & Z-stack

A Guide to Voltage Translation With TXB-Type Translators

Texas Instruments

Modern trends are driving the need for lower supply voltages across many system-level designs. As most processor voltage levels continue to decrease in the interest of achieving the lowest possible power consumption peripheral devices maintain a need for higher voltage levels creating potential for voltage discontinuities within a system. To remedy this mixed voltage system incompatibility a vo

TMS320DM368 Power Consumption Summary (Rev. A)

Texas Instruments

This application report discusses the power consumption of the Texas Instruments TMS320DM368 digital media System-on-Chip (DMSoC). Power consumption on the DM368 device is highly application-dependent; therefore a spreadsheet that estimates power consumption is provided along with this document. To obtain good results from the spreadsheet realistic usage parameters must be entered (see Section 2

TSB42AC3 Overview

Texas Instruments

Using Enhanced Pulse Width Modulator (ePWM) Module for 0-100% Duty Cycle Control

Texas Instruments

This document provides a guide for the use of the ePWM module to provide 0% to 100% duty cycle control and is applicable to the TMS320x280x family of processors.

AN-828 Increasing the High Speed Torque of Bipolar Stepper Motors (Rev. B)

Texas Instruments

This application report shows that increasing the slew rates of the winding currents in a bipolar stepper motor pushes the motor to deliver more torque at high speeds. Simple voltage drives L/R drives and chopper drives are explained. L/R drives and chopper drives achieve slew rates higher than those achieved by simple voltage drives. Finally an example chopper drive is presented.