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Application Notes

OA-13 Current Feedback Loop Gain Analysis and Performance Enhancement (Rev. B)

Texas Instruments
With the introduction of commercially available amplifiers using the current feedback topology byComlinear Corporation in the early 1980’s previously unattainable gain and bandwidths in a DC coupledamplifier became easily available to any design engineer. The basic achievement realized by the currentfeedback topology is to de-couple the signal gain from the loop gain part of the overall tra

U-110 1.5 Mhz Current Mode IC Controlled 50-Watt Power Supply

Texas Instruments
The UC3825 family of PWM control ICs is optimized for high-frequency switched-mode power-supply applications. This application note describes the development of a 1.5 MHz current-mode IC-controlled 50W power supply. Push-pull topology is used for this DC-to-DC converter application of +48V input to +5V at 10A output. Increases in switching speed and dynamic performance are made possible by the U

bq2084-V133 to bq2084-V140 Change List

Texas Instruments
This document describes the design considerations required to change a bq2084-V133 design to a bq2084-V140 solution. Find the latest ordering information and data sheet on the World Wide Web at http:/

Interfacing the DAC8806 and DAC8820 to MSP430 Microcontrollers

Texas Instruments
This application report presents a method for interfacing the DAC8806 and DAC8820 single-channel, current-output, 14-/16-bit multiplying digital-to-analog converters ? to the MSP430F449 processor usin

Production 2: Data Flash Programming/Calibrating the bq20z80 Gas Gauges (Rev. B) (Rev. B)

Texas Instruments
This application report presents a strategy for high-speed economical calibration and data flash programming of the bq20z80 advanced gas gauge chipset family. VB6 code examples are provided along with step-by-step instructions for preparing a golden battery pack.

Using the MSP430 Launchpad as a Standalone I2C Host for Audio Products (Rev. A)

Texas Instruments
TLV320AIC3254, TAS5717, MSP430 Launchpad Using the MSP430 Launchpad as a Standalone I2C Host for Audio Products

Transition Guide for Migrating from the bq2091 to the bq2092

Texas Instruments
Transition Guide for Migrating from the bq2091 to the bq2092

AN-726 Station Management Simplified

Texas Instruments
AN-726 Station Management Simplified

Digital Control of Two Phase Interleaved PFC and Motor Drive Using MCU With CLA

Texas Instruments
Power factor correction (PFC) is used in power systems operating from single phase AC to correct for thenon linearity of the rectifier. Use of PFC in motor drives is increasing because of increased regulation fromthe power utility side. However integration of PFC and field oriented control of motor on a single controllerremains challenging from a processor bandwidth point of view while keep

Five steps to a great PCB layout for a step-down converter

Texas Instruments

Especially for switch-mode power supplies (SMPSs), the printed circuit board (PCB) layout is a critical but often under appreciated step in achieving proper performance and reliability. Errors in the PCB layout cause a variety of misbehaviors including poor output voltage regulation, switching jitter, and even device failure. Issues like these should be avoided at all costs, since fixing them usually requires a PCB design modification. However, these pitfalls are easily circumvented if time and thought are spent during the PCB layout process before the first PCBs are ever ordered.

This article presents five simple steps to ensure that your next step-down converter’s PCB layout is robust and ready for prototyping.

Key Design Considerations for the bq27500 and bq27501

Texas Instruments
This application report provides the basic operating theory and key design considerations for the bq27500 and bq27501 single-cell Li-ion fuel gauge ICs with the Impedance Track™ algorithm. The bq27500/501 ICs are designed to reside on the system's main board in applications with an embedded or removable battery pack. To achieve best results the fuel gauge ICs must work properly with the ba

Implementing DDR2 PCB Layout on the TMS320DM357 DMSoC (Rev. A)

Texas Instruments
This application report contains implementation instructions for the DDR2 interface contained on the TMS320DM357 digital media system-on-chip (DMSoC) devices. The approach that was taken to specify interface timing for the DDR2 interface is quite different than on previous devices.

The previous approach specified device timing in terms of data sheet specifications and simulation models. The sy

DRV8711 Quick Spin and Tuning Guide

Texas Instruments
DRV8711 DRV8711 Quick Spin and Tuning Guide

DSP Solution for Permanent Magnet Synchronous Motor

Texas Instruments
This document presents a solution to control a permanent magnet synchronous motor using the TMS320C24x. This new family of DSPs enables cost-effective design of intelligent controllers for brushless m

DN039 -- IPC for 868/915 MHz operation with the CC112x, CC117x and CC12xx

Texas Instruments
CC1120, CC1121, CC1125, CC1175 DN039 -- Matched Integrated Passive Component for 868 / 915 MHz Operation With CC112x, PDF Source

Designing a UCD3138 Controlled Single Phase PFC

Texas Instruments
The UCD3138 is a digital power supply controller from Texas Instruments offering superior levels of integration and performance in a single chip solution. The flexible nature of the UCD3138 makes it suitable for a wide variety of power conversion applications. In addition multiple peripherals inside the device have been specifically optimized to enhance the performance of AC/DC applications such

Using Adapters to Run Existing xDAIS Algorithms with Codec Engine (Rev. B)

Texas Instruments
This application note proposes a novel approach--using adapters--to running xDAIS algorithms with a Codec Engine (CE) application. An adapter fits between the Codec Engine Runtime and the algorithm (usually on the DSP). Its purpose is to adapt the interface exposed by the algorithm so that it better conforms to a given system programming interface (SPI) such as xDM. In addition an adapter can be

Generation and Recognition of DTMF Signals With the Microcontroller MSP430

Texas Instruments
The first part of the Application Report describes the generation of DTMF signals using the Microcontroller MSP430. Following an explanation of the most important specifications which are involved, th

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