Clare's LIA120 is an optically isolated linear error amplifier with integrated gain and temperature compensation. The device features a shunt regulator, a linear optocoupler and a secondary side sensor for temperature and gain compensation. Integrating these building blocks into an 8-pin surface mount package provides a space saving solution for processing the feedback signal in closed loop power control circuits, as necessary in switching power supplies, UPSs, inverters and motor control systems. The IC provides linear signal transfer, with optical isolation between the output and the input circuits in these products.
Functionally, the LIA120 addresses the important functions for error signal processing in an isolated power control system: First, a circuit comprised of the optical link, a voltage reference and an error amplifier monitor the error signal on the output side of the power system. Secondly, a linear signal is transferred optically to the input side and provides a scaled feedback to the PWM controller on the input side for the power semiconductors. A critical enhancement to this technique is the inclusion of additional sensing for the linear response of the LIA120, with low thermal variations and increased frequency response.
The LIA120 offers design flexibility. Voltage gain of the error signal is set simply with two resistors. The frequency response across the isolation barrier is 40 kHz. The IC is robust for adverse environments offering an isolation voltage of 3750 V r.m.s. Other applications include isolated amplifiers, central office supplies and telephone line isolation.
For more information contact Les Bidgood, Arrow Altech Distribution, +27 (0)11 923 9600, [email protected]
Analysis of switch-mode power supply: inductor violations Altron Arrow
Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.
Read more...Microsoft Windows IoT on ARM Altron Arrow
Computer/Embedded Technology
This expansion means that the Windows IoT ecosystem can now harness the power of ARM processors, known for their energy efficiency and versatility.
Read more...Microchip introduces ECC608 TrustMANAGER Altron Arrow
Circuit & System Protection
To increase security on IoT products and facilitate easier setup and management, Microchip Technology has added the ECC608 TrustMANAGER with Kudelski IoT keySTREAM, Software as a Service (SaaS) to its Trust Platform portfolio of devices, services and tools.
Read more...SolidRun unveils new SoM Altron Arrow
AI & ML
SolidRun and Hailo has unveiled a game-changer for engineers and AI product developers with the launch of their market-ready SoM, which packs the cutting-edge capabilities of the Hailo-15H SoC.
Read more...An evolutionary step in customisable logic Altron Arrow
DSP, Micros & Memory
Microchip Technology is offering a tailored hardware solution with the launch of its PIC16F13145 family of microcontrollers, which are outfitted with a new Configurable Logic Block module.
Read more...MCU for battery-powered applications Altron Arrow
DSP, Micros & Memory
Included in ST’s family of devices is the STM32U031, an ultra-low-power MCU featuring an ARM Cortex-M0+ 32-bit core running at up to 56 MHz.
Read more...LoRaWAN-certified sub-GHz module Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STM32WL5M from ST Microelectronics is the company’s first LoRaWAN-certified module which incorporates two cores, one of them being a wireless stack to optimise the creation of sub-GHz applications.
Read more...Dual-port USB-C power delivery solution Altron Arrow
Power Electronics / Power Management
Infineon’s CYPD7272-68LQXQ is the tray packing option of the company’s dual-port USB-C power delivery solution and features an integrated dual-port USB-C PD + DC-DC controller.