Circuit Cellar's ongoing mission is to provide important information to help you make smart choices with your engineering projects; from prototype to production. As part of that effort, we're now offering themed newsletter content each week that focuses on critical areas of system development. Our new, enhanced weekly Circuit Cellar Newsletter will cover these four areas every month: Microcontroller Watch | IoT Technology Focus | Embedded Boards | 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.
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.
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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.
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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| Current Issue
Circuit Cellar #325: August 2017
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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