Application Notes

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Application Notes

The UC1901 Simplifies the Problem of Isolated Feedback in Switching Regulators

The UC 1901 isolated feedback generator solves many of the problems associated with closing a feedback control loop across a voltage isolation boundary. As a stable and reliable alternative to an optical coupler these devices feature an amplitude modulation system that allows a loop error signal to be coupled with a small R. F. transformer or capacitor. This application note discusses the functi

OPA350, OPA2350, OPA4350 EMI Immunity Performance (Rev. A)

Texas Instruments

Improving the Robustness of Channel Link Designs with Channel Link II Ser/Des (Rev. A)

Texas Instruments

This application note discusses how system designers are able to use Channel Link II ser/Des to improve old and new channel link designs.

Wired-Logic Signaling with M-LVDS

Texas Instruments

M-LVDS devices provide true multipoint functionality. M-LVDS standard contention provisions and Type-2 M-LVDS receivers allow user of these devices in wired-logic signaling designs. This application report discusses M-LVDS features that support wired-logic signaling compares this to LVDS features and demonstrates wired-OR signaling with Texas Instruments M-LVDS complaint transceivers.

AN-271 Applying the New CMOS MICRO-DAC

Texas Instruments

Application Note 271 Applying the New CMOS MICRO-DAC

Designing with the TRF6900 Single-Chip RF Transceiver (Rev. E)

Texas Instruments

Designing with the TRF6900 Single-Chip RF Transceiver

Interfacing the ADS8332 to the TMS320F28335 DSP

Texas Instruments

ADS8332 ADS8331 Interfacing the ADS8332 to TMS320F28335 DSP LEAVE IN MS WORD

Designing an ATCA Compliant M-LVDS Clock Distribution Network (Rev. B)

Texas Instruments

This application report provides a guide to designing ATCA compliant clock distribution networks using M-LVDS devices. The application report consists of a quick description of an ATCA synchronization clock interface an overview of M-LVDS standard an extensive discussion on performance of M-LVDS devices in an ATCA backplane and a set of design recommendations and rules that will assist you in bu

MSP430x5xx Quick Start Guide

Texas Instruments

This quick start guide is intended to assist existing users of the MSP430 line of products in converting existing code to the new MSP430x5xx modules. While the modules operate in accordance with previ

OA-18 Simulation SPICE Models for Comlinear's Op Amps (Rev. B)

Texas Instruments

This application report is a collection of PSpice compatible models for Texas Instruments amplifiers.

TPS2490, Reverse Input Voltage Block

Texas Instruments

If the input voltage to a TPS249X controlled system is reversed, The TPS249X will be destroyed and the load will be exposed to the reverse voltage. This app note proposes a solution for both. A sche

University of New Hampshire Interoperability Lab Conformance Test, TPS23861

Texas Instruments

Clause #33 PSE conformance testing performed on the TPS23861EVM-613.

TMS320F28xx and TMS320F28xxx DSP Power Reference Design (Rev. A)

Texas Instruments

This reference design takes into account the voltage current and start-up requirements of the TMS320F280x Digital Signal Processor (DSP) families. The operating input voltage ranges from 3.4 V to 6 V. This design is a high-efficiency solution that provides two voltage rails (1.8-V core supply and 3.3-V I/O supply) and an active-low reset signal to the DSP. This design can be easily adapted to fi

Q1 2009 Issue Analog Applications Journal

Texas Instruments

Click and Pop Measurement Technique

Texas Instruments

During various occasions a digital amplifier can generate a click or a pop. The click is generated at changes of the operational modes of the amplifier e.g. charging ofcapacitors or mute/unmute. For Class D amplifier systems click is typically at PWM start and stop. The audibility of a click depends on the system amplifier and speaker. Also perception of the click is subjective. This

Battery-charger front-end IC improves charging-system safety

Texas Instruments

By Mao Ye, Applications Engineer, Battery Management Applications, Texas Instruments.

Battery-powered portable devices such as cellular phones have become an important part of people’s daily lives in the past few years. Many types of adapters are available to charge the lithium-ion (Li-ion) battery and power the system, and their electrical specifications usually differ from one manufacturer to another. This challenges system designers to build portable devices that will meet safety and reliability requirements when used with different adapters. This article describes a new battery-charger front-end (CFE) IC, the Texas Instruments (TI) bq243xx, which is optimized to improve the safety of charging Li-ionpowered systems. Together with the battery-charger IC and the protection module in a battery pack, a charging system using the bq243xx CFE provides more robust system-level protection.

How to Develop a Project with TI SYS/BIOS

Texas Instruments

TI SYS/BIOS is a real-time operating system kernel. It is also a component of TI RTOS. TI RTOS is an integration system; it includes TI SYS/BIOS kernel, XDCtools, middleware, MCU driver library, and other kinds of components.

TI-RTOS is a one-stop solution for developing applications for TI embedded processors and is tightly integrated with TI’s Code Composer Studio™ (CCS) development environment.

TI-RTOS also provides many example project packages with which you may start to develop a project with TI SYS/BIOS.

TEC Design White Paper

Texas Instruments

This white paper describes the design of a DSP-based control system for erbium-doped fiber amplifiers in order to stabilize the wavelength of multiple pump lasers. The platform shows a single TMS320F2812 DSP (abbreviated “F2812” throughout this document) controlling the temperature of four lasers. The analog portions of the design were chosen to minimize the temperature measurement error and maximize the efficiency of the drive to the thermoelectric cooler. The platform highlights the advantages of using a single DSP in this application over using discrete TEC controller modules:

• the ability to control the edges of the PWM signals to the TEC drivers, minimizing electrical noise;
• the ability to use the programmability of the DSP to easily handle exception processing;
• the extendibility of the design to additional TEC channels;
• the ability to add function easily to the DSP to control other aspects of the design, such as back facet diode monitoring and dynamic gain flattening filtering.

The paper concludes showing methods to add additional channels to the base design and reduce the board space of the design.

Configuring the bq26500 for Gas Gauging Applications

Texas Instruments

This application note describes the ten EEPROM locations that can be programmed by the user to optimize the setup for the particular battery and host requirements.

Initializing the TLC32040 AIC on the TMS320C5x DSK

Texas Instruments

This document discusses the proper way to initialize the registers of the AIC given certain specifications. Details of the setup criteria equations defining the acceptable options and calculated data are presented to illustrate the solution.