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This design idea provides a simple non-isolated AC/DC power supply for low power applications. Thedesign uses a capacitive-dropper front-end combined with a LM46000 SIMPLE SWITCHER® buckregulator from Texas Instruments. The circuit provides 3.3 V at a minimum of 100 mA from a line supply of90 VAC to 265 VAC. Theory of operation as well as design equations and performance results are given.

A Dead-Band generator protects the power semiconductors during the commutation. The dead time is programmable between 0?s and 102?s. This time range is sufficient for all kinds of power semi-conductors (MOSFET IGBT BIPOLAR and THYRISTOR) in a wide range of kW (kiloWatt) or HP (Horse Powers).TMS320C24x Dead-Band separates the transition edges of two signals: output and complemented output b

This power supply design is used as the main power converter for the Altera Arria GX II FPGA. The input voltage can support adapters up to 20V. The TPS40061 is used to generate 12V @ 7.5A. The TPS54550 is used for 3.3V @ 4.5A.

The LTC3616 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply current in sleep mode is only 70?A while maintaining the output voltage (Burst Mode operation) at no load, dropping to zero current in shutdown. The 2.25V to 5.5V input supply voltage range makes the LTC3616 ideally suited for single Li-Ion as well as fixed low voltage input applications. 100% duty cycle capability provides low dropout operation, extending the operating time in battery-powered systems.The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. For switching noise-sensitive applications, the LTC3616 can be synchronized to an external clock at up to 4MHz.Forced continuous mode operation in the LTC3616 reduces noise and RF interference. Adjustable compensation allows the transient response to be optimized over a wide range of loads and output capacitors.The internal synchronous switch increases efficiency and eliminates the need for an external catch diode, saving external components and board space. The LTC3616 is offered in a leadless 24-pin 3mm ? 5mm thermally enhanced QFN package.Applications Point-of-Load Supplies Distributed Power Supplies Portable Computer Systems DDR Memory Termination Handheld Devices

This dynamic Near Field Communication (NFC) tag design outlines the required components: layout considerations: and provides firmware examples to implement NFC into applications such as Bluetooth® and Wi-Fi® pairing: equipment configuration and diagnostics: or as a general purpose NFC data interface. The documentation: hardware: and example code provided allows the designer to quickly implement NFC functionality with an MSP430 or other MCU of choice.

Demonstration Circuit 1394A shows how the LT3480 high voltage step-down regulator can be used with the LTC4098 USB-compatible Li-Ion battery charger to design a 2 input source battery charger circuit that also provides power to the load from the LT3480, a 5V wall adapter or the batteries based on available power. The LTC4098 interfaces with a number of ADI switching regulators to provide a high efficiency, high voltage power path. The LT3480 operates from 8V to 38V (60V transients) and provides 2A with a voltage range that is mode and load dependent.

The TIDA-00136 reference design is a high speed serial video interface to connect a remote automotive WVGA TFT LCD display with OpenLDI (LVDS) Interface to a video processing system. It uses TIs FPD-Link II SerDes technology to transmit uncompressed video data over shielded twisted pair or Coax cable. Application examples are rear seat entertainment systems: automotive clusters: and Head Unit Display. This design incorporates the DS99R421Q1-EVK and DS90UR124-Q1 boards together to create the solution.

This converter is used for Class 2 or 3 PoE applications. The flyback converter with diode rectifier offers low cost while still achieving good efficiency. This converter is well sutied for PoE applications such as IP phones. The TPS23753A contains both the PoE Powered Device and the PWM controller functions.

The ADF4155 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter, external voltage controlled oscillator (VCO), and external reference frequency.The ADF4155 is for use with external VCO parts up to an 8 GHz operating frequency. The high resolution programmable modulus allows synthesis of exact frequencies with 0 Hz error.The VCO frequency can be divided by 1, 2, 4, 8, 16, 32, or 64 to allow the user to generate RF output frequencies as low as 7.8125 MHz.Control of all on-chip registers is through a simple 3-wire interface. The device operates with a nominal power supply of 3.3 V ? 5% and can be powered down when not in use.The ADF4155 is available in a 24-lead, 4 mm ? 4 mm LFCSP package.APPLICATIONS Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT) Point to point/point to multipoint microwave links Test equipment Wireless LANs, CATV equipment Clock generation

This Ethernet PHY Brick reference design enables Texas Instruments customers to quickly design systems and release them to market: using TI industrial Ethernet PHY transceiver devices: fully compliant to EN5501 Class A EMI requirements. A 50 Pin Interface has been provided to interface with 32-Bit Cortex M4 processor based Controller board. The board has been designed in a small form factor (2 inches x 3 inches) which makes it easy to fit into existing products. This reference design demonstrates the advanced performance of the DP83848K Ethernet PHY transceiver devices: supports 10/100 Base-T and is compliant with IEEE 802.3 standard. The entire reference design operates from a single power supply (5V with On-Board regulator or 3.3V). All other voltages required for the Ethernet PHY transceiver are internally generated.

The AD7873 is a 12-bit successive approximation ADC with a synchronous serial interface and low on resistance switches for driving touch screens. The AD7873 operates from a single 2.2 V to 5.25 V supply, with a throughput rate of 125 kSPS.The AD7873 features direct battery measurement, temperature measurement, and touch pressure measurement. The AD7873 also has an on-board reference of 2.5 V that can be used for the auxiliary input, battery monitor, and temperature measurement modes. When not in use, the internal reference can be shut down to conserve power. An external reference can also be applied and varied from 1 V to VCC with an analog input range from 0 V to VREF. The device includes a shutdown mode that reduces the current consumption to less than 1 ?A.The AD7873 features on-board switches. This, coupled with low power and high speed operation, makes the device ideal for battery-powered systems with resistive touch screens. The part is available in a 16-lead, 0.15 inch quarter size outline package (QSOP), a 16-lead, thin shrink small outline package (TSSOP), and a 16-lead, lead frame chip scale package (LFCSP).PRODUCT HIGHLIGHTS Ratiometric conversion mode available, eliminating errors due to on-board switch resistances. On-board temperature sensor: ?40?C to +85?C. Battery monitor input. Touch pressure measurement capability. Low power consumption of 1.37 mW maximum with the reference off, or 2.41 mW typical with the reference on, at 125 kSPS and VCC at 3.6 V. Package options include 4 mm ? 4 mm LFCSP. Analog input range from 0 V to VREF. Versatile serial I/O ports.APPLICATIONS Personal digital assistants Smart hand-held devices Touch screen monitors Point-of-sale terminals Pagers

This design notes shows the hot swap designer how to control a ?5V rail using a UCC3919 Hot Swap Power Manager. This technique could also be applied using other positive Hot Swap Power Managers. Two c

The AD9520-5 provides a multioutput clock distributionfunction with subpicosecond jitter performance, along withan on-chip PLL that can be used with an external VCO.The AD9520-5 serial interface supports both SPI and I2C ports.An in-package EEPROM, which can be programmed through theserial interface, can store user-defined register settings forpower-up and chip reset.The AD9520-5 features 12 LVPECL outputs in four groups. Anyof the 1.6 GHz LVPECL outputs can be reconfigured as two250 MHz CMOS outputs. If an application requires LVDSdrivers instead of LVPECL drivers, refer to the AD9522-5.Each group of three outputs has a divider that allows both thedivide ratio (from 1 to 32) and the phase offset or coarse timedelay to be set.The AD9520-5 is available in a 64-lead LFCSP and can be operatedfrom a single 3.3 V supply. The external VCO can have anoperating voltage of up to 5.5 V. A separate output driver powersupply can be from 2.375 V to 3.465 V.The AD9520-5 is specified for operation over the standardindustrial range of ?40?C to +85?C. Applications Low jitter, low phase noise clock distribution Clock generation and translation for SONET, 10Ge, 10GFC, Synchronous Ethernet, OTU2/3/4 Forward error correction (G.710) Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs High performance wireless transceivers ATE and high performance instrumentation Broadband infrastructures