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.

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.

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.

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.

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.

This application report describes a feature phone design based on the TMS320LC203. The LC203 is a 3V member of the TMS320C2xx DSP family combining low cost and low power consumption with a computing power of 20 MIPS. Three independent onchip ports UART Serial Port and Parallel Port allow designing with minimal external logic saving cost board space and assuring fast access times.This report

Cerquad, EIAJ

TP3410 2BIQ U Interface Device Users Manual

Comparison of Electrical and Thermal Parameters of Widebus SMD SSOP, TSSOP, TVSOP, and LFBGA Packages Application Report

This application report explains the implementation of a multi-cell lithium-ion the foundation of a battery management system using an TMS570™ microcontroller and the bq76PL455A-Q1.The bq76PL455A-Q1 can be stacked vertically to monitor up to 192 cells without additional isolation components between ICs. A high-speed universal asynchronous receiver/transmitter (UART) bus operates between the b

XIO3130 XIO3130 Implementation Guide

The OMAP-L137 C6747/6745/6743 devices use a great deal of internal pin multiplexing to allow the most functionality in the smallest and lowest cost package. This software allows the pin multiplexing registers of the device to be calculated with ease as well as showing what peripherals can be used together and what devices support the peripherals that are selected. This software is useful to anyo

AN003 -- SRD Antennas

Asynchronous communication protocols rely on each node operating at the same frequency. Modulating the microcontroller operating frequency is possible when the modulation frequency is large enough. Unfortunately the EMC-reducing aspects of clock modulation are most effective when the modulation frequency is small. This application note defines the minimum modulation frequency in relation to the C

The LM3404/04HV is a buck-regulator designed for driving high powered LEDs at forward currents of upto 1.0A. LED drivers often experience thermal conditions that are extreme even by the standards ofswitching converters. For example LED drivers are often placed on the same metal-core PCB (MCPCB)as the LEDs themselves. At 1.0A a single-die white LED can dissipate more than 3W. The temperatur

Trapezoidal Control of BLDC Motors Using Hall Effect Sensors (DRV8312-EVM)

This EVM application converts an input value with the analog-to-digital converter (ADC) module of the Texas Instruments (TI)(tm) TMS320F240 Evaluation Module (EVM) and outputs a pulse width modulated (PWM) signal corresponding to the digital conversion of the analog input.

This application note provides an indepth discussion of design references for A/D converters.