Digital Control of Two Phase Interleaved PFC and Motor Drive Using MCU With CLA
Texas InstrumentsPower 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 InstrumentsEspecially 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 InstrumentsThis 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 InstrumentsThis 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
DSP Solution for Permanent Magnet Synchronous Motor
Texas InstrumentsThis 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 InstrumentsCC1120, 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 InstrumentsThe 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 InstrumentsThis 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 InstrumentsThe 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 InstrumentsA 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. Measured system performance met the requirements for such systems.
Optimizing JPEG on the TMS320C6211 2-Level Cache DSP
Texas InstrumentsThis application report describes the implementation and optimization techniques of the Joint Photographic Experts Group (JPEG) the still image compression standard on the TMS320C6211. The TMS320C6211 is a low-cost and high-performance digital signal processor (DSP) with 2-level caches that utilizes the VelociTI? very-long-instruction-word (VLIW) architecture.The TMS320C6211 has 64KB of L2 m
Bandsplitting Using Two GC2011 Digital Filter Chips
Texas InstrumentsThis 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 samples and then multiplexed into a time division multiplexed (TDM) format. The even sample TDM stream is input to the A-input of the chip and the odd sample TDM stream is input to the B-input. The I-half
EncodeDecode Demo for the DaVinci DVEVM/DVSDK 1.2 (Rev. A)
Texas InstrumentsEncodeDecode 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 InstrumentsMicro SMDxt is a wafer level CSP (WLCSP) with the following features:
- Package size equal to die size
- Smallest footprint per I/O count
- No need for underfill material
- Interconnect layout available in 0.4 mm or 0.5 mm pitch
- No interposer between the silicon IC and the printed circuit board
Audio Echo on the DM642 EVM
Texas InstrumentsThe 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 buffer enters a loop reading audio samples then processes the samples and writes them back into the audio codec.
The demonstration:
- Computes the read pointer and adds a sample on each
System Testability Using Standard Logic (Rev. A)
Texas InstrumentsThe 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 advances improve system performance and decrease the physical size of printed-circuit boards (PCBs) but complicate the task of system testing. Access to test nodes using bed-of-nails testing is red
