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A three phase sine wave oscillator can be built using one UAF42 state variable filter along with some resistors and diodes. Three output nodes are available; highpass out bandpass out and lowpass out. The signal at the bandpass and lowpass out nodes are 90° and 180° out of phase respectively with the highpass out node. An on-chip auxiliary op amp is available for use as a buffer or gain

This document discusses the default voltages and boot orders of the TPS65910x power management integrated circuits (PMICs).

This application report presents a solution to control a permanent magnet synchronous motor (PMSM)using the TMS320F2833x floating-point microcontrollers. TMS320F2833x devices are part of the family ofC2000 microcontrollers which enables the cost-effective design of intelligent controllers for three phasemotors by reducing system components and increasing efficiency. With these devices it i

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.

LMK04808, CDCE62005, DAC3482 Effects of Clock Noise on High Speed DAC Performance

Although designed to perform analog white LED dimming from a PWM input signal the TPS61500 also can perform analog dimming from an analog input signal such as a digital-to-analog converter for example.

You can easily interface multiple TMS320C6000™ (C6000™) DSP devices to each other by way of a direct connection of the expansion bus (XBus). Each device's XBus I/O port masters the other's XBus host port configured for asynchronous slave mode.

This application report highlights the XBus asynchronous host mode and XBus asynchronous I/O mode and explains the interface used to connect t

The Preview Engine block in the DaVinci video processing sub-system (VPSS) provides some critical functions for image and video processing. These functions if implemented in software require a significant number of computations in terms of million instructions per second (MIPs). By offloading these functions the valuable MIPs can be used for more differentiating tasks such as video compression

This application report provides direction for programming the Control Words (also known as Control Mode Registers or CMR) of DDR3 Register Buffers which are compliant with the JEDEC SSTE32882 specification.

This application report presents an efficient and precise method on how to achieve the desired resonant frequency of configuring the trim array with only a few iterations and measuring the resonant frequency. First the minimum and maximum resonant frequency is measured; from this data a capacitance gradient is derived which allows a good prediction of the required capacitance. The calculated cap

High-efficiency, high-density power supplies have been a trend for communications equipment due to increasing power consumption and reduced board space. A stacked-FET switch enables high-efficiency and high-density solutions. Two real design examples are examined to illustrate this point. The first is a 30-A design where the benefits of a stacked-FET switch are evaluated relative to size reduction, efficiency gain and thermal budget savings. A second design implements the stacked-FET switch with an integrated driver to further increase system efficiency in a 60-A supply.

As modern electronics equipment advances in speed and performance, the number of power rails keeps increasing in addition to an increase in power consumption. Conversely, the physical area for power supplies keeps shrinking because precious real estate is given to the core ASIC and processors. As such, a high-efficiency, high-density power supply is a challenge for every power designer.

This application report presents a solution to control a 3-phase Permanent Magnet Synchronous motor using the Texas Instruments (TItm) TMS320F240 digital signal processor (DSP). This processor is part

This application report describes the different types of voice-band CODECs for telephony applications such as client modem analog interface circuits central office line card CODEC/filter combos and voice-band audio processors. A summary of the characteristics of each is included.This report focuses on the recommended client modem analog interface circuits (AICs) fabricated by Texas Instrumen

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

Interfacing the DAC8554EVM to TMS320C6x Processors

A small monitor program for the MSP430F1xx and MSP430F4xx microcontrollers that incorporate at least one integrated USART provides a facility for examining the device memory and updating the flash con

This document describes the design changes from the bq27541 (firmware version 1.12) to bq27541-v200 (firmware version 2.00). For ordering information and data sheet see the Texas Instruments Web site.