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Application Notes

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.

How to Calculate TPS92630-Q1 Maximum Output Current for Automotive Exterior Ligh

Texas Instruments

This application report provides the method of calculating the maximum output current of the TPS92630-Q1 device in exterior-lighting automotive applications. The junction-to-ambient thermal resistance (RθJA) of the TPS92630-Q1 device is the key parameter when calculating the maximum output current of the TPS92630-Q1 device. This application report provides a method about how to measure the RθJA of TPS92630-Q1 reference boards. The reference boards are fabricated with different copper thickness. A comparison table of both measured and simulated RθJA of different copper thickness is given in the report for correlation.

How to reduce current spikes at AC zero-crossing for totem-pole PFC

Texas Instruments

Power factor correction (PFC) is widely used in AC/DC power supplies with an input power of 75 watts or greater. PFC forces the input current to follow the input voltage so that any electrical load appears like a resistor. Amongst all the different PFC topologies, the totem-pole PFC has recently received more attention because it uses the least number of components, has the smallest conduction loss, and has the highest efficiency. Typically, a totem-pole PFC cannot operate in continuous-conduction mode (CCM) because of the slow reverse recovery of the MOSFET’s body diodes. However, with the advent of the galliumnitride (GaN) FET, its diode-free structure makes the CCM totem-pole PFC possible.

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 s

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 (u

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

Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (Rev. A)

Texas Instruments
A prototype system for seismic sensing for such applications as oil exploration, earthquake detection, and acoustic monitoring is described. The system uses a delta-sigma converter and low-power DSP.

Optimizing JPEG on the TMS320C6211 2-Level Cache DSP

Texas Instruments
This application report describes the implementation and optimization techniques of the Joint Photographic Experts Group (JPEG), the still image compression standard on the TMS320C6211. The TMS320C621

Bandsplitting Using Two GC2011 Digital Filter Chips

Texas Instruments
This application note describes how to use a single GC2011 chip to perform the real-to-complex down conversion operation on four signals simultaneously. The input data is split into even and odd sampl

EncodeDecode Demo for the DaVinci DVEVM/DVSDK 1.2 (Rev. A)

Texas Instruments
EncodeDecode Demo for the DaVinci DVEVM/DVSDK 1.2 Application Report

Reading and Understanding an ESD Protection Datasheet

Texas Instruments
<p>System engineers must choose all components for their designs carefully. Picking the right ESD protection elements can be challenging as the matter of protecting devices on the PCB against ESD str

AN-1412 Micro SMDxt Wafer Level Chip Scale Package (Rev. K)

Texas Instruments
Micro SMDxt is a wafer level CSP (WLCSP) with the following features: <ul> <li>Package size equal to die size</li> <li>Smallest footprint per I/O count</li> <li>No need for underfill material</li>

Audio Echo on the DM642 EVM

Texas Instruments
The software demonstrates an audio loopback example on the DM642 EVM, with programmable echo added to the input signal. The demonstration creates and primes the audio I/O streams, initializes the echo

System Testability Using Standard Logic (Rev. A)

Texas Instruments
The use of more sophisticated ASICs and microprocessors and a steadily increasing move toward surface-mount packaging has led to the increasing complexity and density of digital systems. These adv

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