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Microcontroller Watch | IoT Technology Focus | Embedded Boards | Analog & Power. Your feedback is always welcome. - Jeff Child (jchild@circuitcellar.com)
Analog & Power Analog & Power is where it gets real. Converting signals to and from analog is how embedded devices interact with the real world. And without power supplies and power conversion, electronic systems can't do anything. This newsletter content zeros in on the latest developments in analog and power technologies including DC-DC converters, power supplies, power management ICs, and and more.
High Isolation DC/DC Converters Target Industrial Power
Murata Power Solutions has introduced a series of high isolation DC/DC converters. The MGJ6 wide, low-profile series converters feature a 14 mm creepage and clearance distance for use in reinforced-rated isolated-gate drive-power applications in higher efficiency 690 VAC industrial electrical distribution systems. They provide optimized voltages for best system performance and efficiency.
This high isolation DC-DC converter series is designed for powering high- and low-side gate-drive circuits for IGBTs and silicon and silicon carbide MOSFETs in bridge circuits used in motor control applications and industrial power installations. Rated at 6 W, the dual output converters provide a wide 2:1 input voltage range with nominal values of 5 V, 12 V, and 24 V, and with output voltages of 15/-10 V, 20/-5 V, and 15/-5 V.
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Zero-Drift Op-Amp Consumes Only 1.3 μA Analog Devices, which recently acquired Linear Technology, has announced the LTC2063 zero-drift op-amp, which draws just 1.3 μA type (2 μA maximum) on a 1.8 V supply. This micropower amplifier maintains high-precision: maximum input offset voltage is 5 μV at 25°C, maximum drift is 0.06 μV/°C from -40°C to 125°C. Maximum input bias current is 15 pA at 25°C, and 100 pA from -40°C to 125°C. These high-precision input characteristics enable the use of large value feedback network resistors, keeping power consumption low without compromising accuracy, even at elevated temperature.
Rail-to-rail inputs and outputs simplify single supply use and enhance dynamic range. An integrated EMI filter provides 114 dB electromagnetic interference rejection at 1.8 GHz. With low 1/f noise inherent to its zero-drift architecture the LTC2063 is well suited for amplifying and conditioning low-frequency sensor signals in high-temperature industrial and automotive systems as well as portable and wireless sensor network applications.
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Single-Chip Battery Controllers Enable USB Power Delivery
Texas Instruments (TI) has introduced a pair of highly flexible, single-chip buck-boost battery charge controllers for one- to four-cell (1S to 4S) designs. The bq25703A and the bq25700A synchronous charge controllers support efficient charging through USB Type-C and other USB ports in end equipment ranging from notebooks and tablets to power banks, drones, and smart home applications. To learn more information about the bq25703A and the bq25700A, visit www.ti.com.
Supporting both I2C and SMBus interfaces, the bq25703A and the bq25700A feature a new advanced battery algorithm, enabling full power output by adding intelligence to battery charging through maximum power point tracking technology. The unique algorithm, referred to as input current optimization (ICO), automatically detects the full capacity of input power to optimize current, while maintaining consistent system and charging current to ensure the utilization of maximum input power.
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Compact Power Management ICs Boast Low Standby Power
Maxim Integrated Products.offers a pair of power management ICs (PMICs) aimed at designers of Bluetooth headphones, activity monitors, smart garments, smartwatches, and other size-constrained devices where battery life and efficiency are priorities.
The MAX77650 and MAX77651 feature single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails from a single inductor, 150 mA LDO, and three current sink drivers to reduce overall component count and maximize available board space. For design flexibility, the MAX77650 operates up to 3.3 V and the MAX77651 operates up to 5 V - both include an analog multiplexer (MUX) output for safe battery monitoring, making them ideal for low-power designs.
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Non-Isolated DC Switching Regulators Deliver 96% Efficiency
CUI's Power Group has announced the addition of four new series to its family of non-isolated dc switching regulators. The next generation VX78-500, VXO78-500, VX78-1000, and VXO78-1000 series are extremely efficient, typically up to 96%, and balance maximizing economy while delivering a high level of performance as a direct alternative to using linear regulators. Utilizing switching technology, the models are footprint compatible with TO-220 package LM78XX and LM79XX model regulators and unlike linear regulators, do not require a heatsink. This makes them ideal for use in portable devices, battery-fed equipment, and embedded designs where board space is at a premium and energy efficiency is a concern.
The encapsulated VX78 series and open frame VXO78 series, suited for positive or negative output applications, both offer 500 mA and 1 A output current options and have no-load input currents as low as 0.2 mA. Packaged in an ultra-compact, 3-pin SIP footprint, the encapsulated models measure just 0.45" x 0.29" x 0.40" (11.60 mm x 7.55 mm x 10.16 mm), while the open frame models have even smaller dimensions of 0.39" x 0.28" x 0.43" (10 mm x 7.20 mm x 11 mm).
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45 W Photovoltaic DC/DC Converter Has 150 to 1500 VDC Input Range
Aimtec has introduced its AM45W-NS series feature an ultra-wide 150 to 1500 VDC input range with dual separated outputs.The AM45W-NST with an output power of 45 W has the largest input voltage range on the market, ranging from 150 to1500 VDC and can reach a maximum of 1,600 VDC for up to 1 second. In addition, the new series comes equipped with a regulated dual output signal and a high input to output isolation of 4,000 VAC tested over a 60 second cycle during manufacturing.
The series also supports three nominal input voltage levels of 200, 850, and 1,400 VDC and separates the output voltages to two ±15 VDC outputs. Operating temperature are within the -40°C to 85°C range. This series is designed to meet the solar energy conversion into DC electricity requirements for photovoltaic power generation and high-voltage inverters.
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Industry News & Recent Posts
The USB 3.0 Promoter Group has announced the pending release of the USB 3.2 specification, an incremental update that defines multi-lane operation for new USB 3.2 hosts and devices, effectively doubling the bandwidth to extend existing USB Type-C cable performance. ... Continue reading →...» Cadence Design Systems has announced the Cadence Tensilica HiFi 3z DSP IP core for system-on-chip (SoC) designs targeted for the latest mobile and home entertainment applications, including smartphones, augmented reality (AR)/3D goggles, digital TVs, and set-top boxes (STBs). The new ... Continue reading →...» This article continues the foray into breaking software security routines, now targeting a software implementation of DES. This builds on a previous example of breaking a hardware AES example. In his previous article, Colin O'Flynn said I broke a simple ... Continue reading →...» Although many young engineers have been taught excellent circuit design techniques, most haven't been schooled about the importance of timing analysis. What is timing analysis? Why is timing analysis important? How do you perform timing analysis? Philip Nowe's Circuit Cellar ... Continue reading →...» Crowd funded via Crowd Supply, a project called µduino is an Arduino measuring in at 12 mm (0.5") x 12 mm. While similarly sized microcontroller boards do exist, their power is severely limited to using chips such as the Attiny85 (with ... Continue reading →...» CUI's Power Group has announced the addition of a new 3 W isolated DC-DC converter series to its portfolio of low power DC-DC converters. The PQME3 series housed in a compact, industry standard 14 pin surface mount package measuring 0.76 ... Continue reading →...»
Renesas Electronics has announced that it has created a development kit for its R-Car that takes advantage of "emotion engine," an artificial sensibility and intelligence technology pioneered by cocoro SB Corp. The new development kit enables cars with the sensibility ... Continue reading →...» |
Current Issue
Circuit Cellar #325: August 2017
Digital Subscriber Login Purchase Issue Q&A: Krste Asanovic on RISC-V | Power Supplies for Guitar Amps | Design Example: Cypress PSoC | Firmware Upgrade on Microchip PIC32MZ | Reliability and Failure Prediction | PID Temp Control for a Meat Smoker | Inside Electronic Locks | How to Break DES Encryption | Fully Differential Amplifiers | Wi-Fi to the Danger Zone
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