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EETE JULAUG 2015

Self-protected resettable e-Fuse reduces unnecessary field returns Designed to enhance system reliability against shutdown and catastrophic failures, the NIS5135 resettable electronic fuse introduced by Diodes Incorporated is suited to plug and play applications in consumer applications including hard disc and solid state drives, printers, and set-top boxes. By allowing the product to recover, this e-fuse helps reduce unnecessary field returns. Operating over a wide 3.1V to 18V input voltage range and rated at 3.6A, the NIS5135 integrates an NMOS power device with a low 30mΩ RDS(ON) for reduced power loss. It also features an internal current limit that avoids the voltage drop normally incurred by an external sense resistor in the load path. An over-voltage circuit limits the output voltage without shutting the device down, while downstream components are further protected from damage or premature failure by under-voltage lockout (UVLO) and thermal shutdown circuits, with latching (NIS5135MN1) or auto-retry (NIS5135MN2) options. Supplied in a small, low profile U-DFN3030-10 package to minimize application footprint, the NIS5135’s industry-standard pin-out allows it to drop into existing designs, providing an alternative lowercost source for high volume production. Diodes Incorporated www.diodes.com 700V HVIC MOSFET drivers improve reliability, cut footprint Infineon Technologies’ family of rugged, reliable 700 V High- Voltage ICs (HVICs) is optimised for solar, power supply, uninterruptible power supplies (UPS), welding and industrial drive applications. The 700 V offering enables designers of high-voltage power stages to simplify their design while making them more robust. The IR7xxxS series of HVICs feature sink/ source ratings from 60 mA to 2.3A and employ PN junction technology. Available in half bridge and high- and low-side configurations, they are optimised for 700V MOSFETs and 650V IGBTs and offer full driver capability with extremely fast switching speeds to reduce magnetics component count. Infineon adds that the IR7xxxS series offers the simplest, smallest and lowest cost solution to drive MOSFETs or IGBTs up to a blocking voltage of 700V, with up to 30% reduction in part count and up to 50% of board space compared to discrete optocoupler or transformer-based solutions. They have increased breakdown voltage and rugged transient performance. Features of the devices include undervoltage lock-out protection for both channels, and lower di/ dt gate driver for better noise immunity. The HVICs are tolerant to negative transient voltage dv/dt, offer matched propagation delay for both channels and are 3.3 and 15V input logic compatible. Infineon www.infineon.com TI sets Cortex-A9 MCU price point at $7 Texas Instruments is extending its Sitara AM437x processor family to include lower cost products with an ARM Cortex-A9 plus a variety of peripherals. Texas Instruments is extending its Sitara AM437x processor family to include lower cost products with an ARM Cortex- A9 plus a variety of peripherals. The Sitara AM4376 processor hosts an ARM Cortex-A9 core and will sell in production vo-lumes for around $7. This 300MHz processor extends the Sitara processor portfolio with a scalable, pin-compatible processor that’s an economical option for designers using the range of peripherals in the Sitara AM437x family. The AM437x processors integrate support for industrial protocols for automation and industrial drives suiting them to applications such as building automation, telecom infrastructure, and industrial tools. Sitara AM437x processors are offered in commercial (0 to 90C), industrial (-40 to 90C) and extended (-40 to 105C) junction temperature ranges; four pin compatible and software compatible processor options are available, and at clock speeds of 300 MHz, 800 MHz and 1 GHz plus optional 3D graphics acceleration for enhanced user interfaces As part of the Sitara AM437x family, the AM4376 processor contains a programmable real-time unit, industrial communications subsystem (PRU-ICSS) that offloads tasks from the ARM core so developers can save cost and differentiate their designs. Texas Instruments www.ti.com Motion feedback encoders support up to 5,000 counts per revolution Avago Technologies’ AEDT-981x motion feedback encoders are designed to enable robust, high precision motion control applications including DC servo motors, linear and rotary actuators, factory automation equipment, 3D printers, robotics and drones. The module series features a built-in interpolator supporting a wide range of encoding resolution from 1,000 to 5,000 counts per revolution (CPR) using a code-wheel of 11mm optical radius. The devices are industrial grade with operating temperature from -40 to +115 °C. Compared to competitive solutions on the market, the AEDT-981x is claimed to operate with a 70% lower supply current minimizing encoder power consumption (20mA typical ICC). It has a wide spatial play tolerance of 0.4mm and code-wheel gap tuning range of +/-0.15 mm, providing ease of motor shaft alignment and enhancing photo detector signal integrity. The 26.67x20.8x10.16mm encoder is available in a standalone module unit like the AEDT-981x or in three pre-assembled housed module kits. The AEDM-5xxx is a kit with patented snap on cover, the AEDC-5xxx is a kit with connector latch, and the AEDL-5xxx is a kit with integrated differential line driver IC supporting RS-422 outputs. Avago Technologies www.avagotech.com 42 Electronic Engineering Times Europe July-August 2015 www.electronics-eetimes.com


EETE JULAUG 2015
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