1500 W AD-DC Power Supplies Certified for Medical and ITE

TDK has announced the introduction of the TDK-Lambda 1500 W rated CUS1500M series of AC-DC power supplies. This extends the CUS-M family of products, to now cover 30 W to 1500 W. The CUS1500M has both medical and ITE (Information Technology Equipment) certifications and is ideally suited for industrial, medical, cosmetic laser treatment and analysis equipment requiring less than 300 µA earth leakage current, low audible noise and class B EMI.

The 1500 W additions are available with 12, 15, 24, 36 and 48 V outputs, adjustable from -15/+20% (+15% for the 48 V) of nominal. All models accept an 85 to 265Vac input and can operate at full load in -20oC to +50oC ambient temperatures, derating linearly to 60% load from +50oC to +60oC. High operating efficiencies of up to 88% reduce internal waste heat and component temperatures, resulting in electrolytic capacitor service life predictions of at least ten years.

The CUS1500M measures 127 mm x 63 mm x 261 mm and has a seven-year warranty. Other features include a 5 V, 1 A standby voltage, remote on/off, parallel operation of up to five units, an isolated open collector DC good / fan fail signal and a variable speed fan that produces 45 dBA (typical) at 30°C at 70% load.

To facilitate safe and easy installation, output cable connections are made to screw terminal blocks with covers rather than bus bars. The terminal block can also be quickly configured for either a vertical or horizontal wiring orientation.

The TDK-Lambda CUS1500M models are certified to the safety standards of IEC/ES/CSA/EN 60601-1, IEC/UL/CSA/EN 60950-1 (62368-1 pending), IEC/EN 62477-1 (OVC III), and are CE marked according to the Low Voltage, EMC and RoHS2 Directives. Input to output isolation is 4,000Vac (2 x MoPP), input to ground 2,000Vac (1 x MoPP) and 1,500Vac output to ground (1 x MoPP) for suitability with B and BF rated equipment. All models offer conducted and radiated performance to EN55011/EN55032-B, meet EN 61000-3-2 harmonics and are compliant to EN 61000-4 and EN 60601-1-2 (Edition 4) immunity standards.

Major applications include industrial, medical, cosmetic laser treatment and analysis equipment requiring less than 300µA earth leakage current, Class B EMI and low acoustic noise.

Main features and benefits:• Seven year warranty

• IEC 60601-1 / 60950-1 safety certification
• Compact case size
• Class B conducted and radiated EMI
• Long service life (conservative electrolytic capacitor ratings)

TDK Lambda| www.us.tdk-lambda.com

Power Supplies Lean Toward an Application Focus

Medical and More

Your choice of power supply can have a major impact on your embedded system’s capabilities. Power supply innovators are smoothing the way with devices designed to match application needs.

By Jeff Child, Editor-in-Chief

Arguably the unsung heroes of any embedded system design, power supplies and converters are critical enablers for meeting today’s needs. As embedded systems pack ever more intelligence into smaller spaces, power has direct implications on the size, cooling and mobility of any system.

To keep pace, power supply vendors continue to roll out more efficient products, new partitioning strategies and more compact solutions. In tandem to those trends, there’s a growing demand to reduce size, weight and power of system electronics. Driving those demands is a desire to fit more functionality in the same space or into a smaller footprint.

If you look at the power supply products released over the last 12 months, there’s been a definite uptick in new products that have some sort of application or industry focus. While this hasn’t diminished the role of general purpose power supplies, the trend has been toward supplies that include either certifications, special performance specs or tailored packaging intended for a specific application area such as medical, industrial, railway or the IoT.

Power Supplies for Medical

An example along those lines in the medical space is the TDK-Lambda brand CUS150M series of AC-DC 150 W rated power supplies announced early this year by TDK (Figure 1). The device has the capability of operating in ambient temperatures of up to 85°C without the need for forced air cooling. Certified to medical and ITE standards for Class I and II (no earth ground connection) operation, the product meets both curve B radiated and conducted emissions. CUS150M target applications include medical, home healthcare, dental, test and measurement, broadcast and industrial equipment.

Figure 1
The CUS150M series of AC-DC 150 W rated power supplies are certified to medical and ITE standards for Class I and II operation. It meets both curve B radiated and conducted emissions.

Output voltage options include 12 V, 15 V, 18 V,  24 V, 28 V and 36 V models. The CUS150M operates from an 85 VAC to 264 VAC input and has operating efficiencies up to 91%. Off-load power consumption is less than 0.5 W and a 10 V to 12 V, 0.5 A fan supply is fitted as standard.

The open frame version is in the industry standard 50.8 mm x 101.6 mm (2″ x 4″) footprint with a height of 31.5 mm. Convection cooled it can deliver 120 W at 40°C, or with forced air cooling 150 W at 50°C, 140 W at 70°C and 75 W at 85°C. With the U-channel construction variant, measuring 64 mm x 116 mm x 38.5 mm, the CUS150M can be conduction cooled via a cold plate to deliver 150 W at 50°C, 100 W at 70°C and
50 W at 80°C. Cover or top fan options are also available.

Input to output isolation is 4 kVAC (2xMoPP (Means of Patient Protection)), input to ground 1.5 kVAC (1xMoPP) and output to ground 1.5 kVAC (1xMoPP) making the series suitable for B and BF rated medical equipment. Touch current is a maximum of 100 µA, with leakage current less than 250 µA. 5,000 m is the maximum operating, transportation and storage altitude.

Encapsulated Converters

Also targeting medical applications, Minmax Technology offers its Minmax MAU01M / MSCU01M series, a range of high performance 1 W medical safety approved DC-DC converters with encapsulated SIP-7 and SMD packages. They are specifically designed for medical applications. The series includes models available for input voltages of 4.5 VDC to 5.5 VDC, 10.8 VDC to 13.2 VDC, and 21.6 to
26.4 VDC. The I/O isolation is specified for 4,000 VAC with reinforced insulation and rated for a 300 VRMS working voltage.

Additional features include short circuit protection, a low leakage current of 2 μA max. and operating ambient temperature range of -40°C to 95°C. This is achieved without de-rating and with a high efficiency of up to 84%. The MAU01M / MSCU01M series conforms to the 4th edition medical EMC standard. It meets 2xMoPP per 3rd edition of IEC/EN 60601-1 and ANSI/AAMI ES60601-1. The MAU01M / MSCU01M series offers an economical solution for demanding medical instrument applications that require a certified supplementary and reinforced insulation system to comply with latest medical
safety approvals under the 2xMoPP requirements.

Meanwhile, CUI’s Power Group added five open frame series products, ranging from
180 W up to 550 W, to its line of internal AC-DC medical power supplies (Figure 2). Certified to the medical 60601-1 edition 3.1 safety standards for 2xMoPP applications and 4th edition EMC requirements, the VMS-180, VMS-225, VMS-275, VMS-350 and VMS-550 series feature high efficiency up to 94% and high-power densities up to 30 W/in3. The devices are housed in 2″ x 4″ (50 mm x 101 mm) and 3″ x 5″ (76 mm x 127 mm) packages with profiles measuring as low as 0.75″ (19 mm), providing a compact, high density solution fokproviding a compact, high density solution for medical diagnostic equipment, medical monitoring devices and dental applications.

Figure 2
The VMS-180, VMS-225, VMS-275, VMS-350 and VMS-550 series power supplies are certified to the medical 60601-1 edition 3.1 safety standards for 2xMoPP applications and 4th edition EMC requirements.

All of these VMS series supplies provide output voltage options from 12 VDC to 58 VDC, feature wide universal input voltage ranges from 80 VAC to 264 VAC and offer no-load power consumption as low as 0.5 W. The 180 W to 550 W models also carry an input to output isolation of 4,200 VAC with leakage current ratings as low as 0.3 mA at 230 VAC. Operating temperatures range at full load from -40°C up to +50°C with forced air cooling, derating to 50% load at +70°C.

Other features include protections for over voltage, over current and short circuit, along with power factor correction and a 12 VDC / 500 mA fan output. These medical power supplies further meet EN 55011 Class B limits for conducted and radiated emissions and achieve an MTBF of 3.37 million hours, calculated per Telcordia SR-332 Issue 3. …

Read the full article in the September 338 issue of Circuit Cellar

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Chip Marries 60 V Buck Controller and 4 Buck Regulators

Analog Devices has announced the Power by Linear LTC3372, an integrated power management solution for systems that require multiple low voltage outputs generated from an input voltage as high as 60 V. The LTC3372 features a 60 V synchronous buck switching regulator controller followed by four configurable synchronous monolithic buck regulators. This combination provides up to five high efficiency low quiescent current outputs in a single IC, well-suited for automotive, industrial and medical applications.

The LTC3372’s buck controller operates over a 4.5 V to 60 V input voltage range and drives an all N-channel MOSFET power stage. Its output can be programmed to either 3.3 V or 5 V and can generate an output current up to 20 A. The controller output is typically used to feed the four monolithic buck regulators. Each monolithic buck channel can be programmed to regulate an output voltage as low as 0.8 V with a configurable output current up to 4 A. Eight 1 A integrated power stages are programmed by the C1-C3 pins into one of eight unique configurations, from a quad 2 A buck to a dual 4 A buck. This allows only one inductor per channel.

The LTC3372 offers a low IQ solution ideal for battery-powered or automotive applications in which one or more power supply rails are always on. With just the high voltage controller enabled, the device draws 15 µA from a 12 V input supply while regulating the output to 5 V at no load. Each monolithic buck regulator adds only 8 µA of additional IQ per channel enabled. The LTC3372’s monolithic buck switching frequency can be programmed from 1 MHz to 3 MHz and can be synchronized to an external clock while the buck controller switches at 1/6 of this frequency. Additional features include foldback current limiting, soft-start, short-circuit protection and output overvoltage protection.

The LTC3372 is available from stock in a thermally enhanced 48-pin 7 mm × 7 mm QFN package. E and I grades are specified over an operating junction temperature range of –40°C to 125°C, and the H grade features operation from –40°C to 150°C.

Analog Devices | www.analog.com

MCU-Based Blood Pressure Monitoring Eval Kit

Renesas Electronics has announced an expansion of its healthcare solution lineup with the launch of a new blood pressure monitoring evaluation kit. The new blood pressure monitoring evaluation kit comprises hardware and software elements needed to jump start blood pressure measurement design. The kit includes a pressure sensor, arm cuff, pump, electronically controlled valve, LCD panel and a reference board. The reference board incorporates an RL78 MCU-based ASSP (application specific standard product) that includes analog functions required for blood pressure measurement. Reference software and graphical user interface (GUI) development tool are also part of the new evaluation kit. Using the new evaluation kit, system manufacturers can immediately begin their system evaluations and significantly reduce their development time.


The Internet of Things offers consumers connected tools with which to manage their personal healthcare more efficiently. For instance, blood pressure monitors are already popular personal medical devices and the market is expected to grow further as blood pressure monitoring functions are incorporated into wearable devices. The growth of this market offers new business opportunities, but can also be challenging, particularly for system manufacturers who are new to the connected healthcare device ecosystem and may not have the built-in application-specific expertise. Blood pressure measurement requires a specific expertise, including filtering functions for extracting the waveforms required for measurement, making it extremely time consuming to start studying this area from the very beginning.

Renesas has developed the new blood pressure monitoring evaluation kit to alleviate the development pain points, providing functions close to those used in actual blood pressure monitors thus accelerating blood pressure measurement system development.

Key features of the blood pressure monitoring evaluation kit:

The new blood pressure monitoring evaluation kit comprises hardware and software elements needed to jump start blood pressure measurement design, including:

  • A full range of hardware components, including a pressure sensor, arm cuff, pump, electronically controlled valve, LCD panel, and a reference board that incorporates the newly-developed RL78/H1D ASSP with the analog functions required for blood pressure measurement.
  • Reference software that provides the algorithms required for blood pressure measurement and that can be easily modified, as well as access to smartphone applications, and a graphical user interface (GUI) tool.
  • A Bluetooth Low Energy (BLE) module, which enables the measured data to be transmitted to a smartphone under the Continua standard blood pressure monitoring (BPM) profile is also provided in the new evaluation kit.

Development support with GUI tool, specialized for blood pressure measurement

  • The pressure sensor, pump, electronically controlled valve components, and pulse width modulation control can be set from the GUI tool. If the system structure is the same, the GUI tool can also be used for system evaluation of the actual application the system manufacturer is developing.
  • The IIR digital filter calculations required for extracting the pulse waveform from the cuff pressure output waveform during blood pressure measurement can also be simulated using the GUI tool. The digital filter constants calculated based on this simulation can be written from the GUI tool to the RL78/H1D firmware and verified in the actual application being developed. This significantly reduces the number of steps in the development process.

RL78/H1D ASSP with optimized analog functions for healthcare applications

  • The RL78/H1D is a new ASSP of the RL78 Family of MCU. The RL78/H1D, designed to control systems required for blood pressure measurement with a single chip. It incorporates rich analog functions including high-resolution delta sigma A/D converters, programmable gain instrumentation amplifiers, D/A converters, operational amplifiers, and other circuits required for blood pressure measurement, as well as timers for PWM (pulse-width modulation) control.
  • In addition to the delta sigma 24-bit A/D converters, the RL78/H1D also provides 10-bit sequential comparison A/D converters that operate asynchronously. This simplifies implementation of systems providing temperature measurement and battery voltage monitoring while measuring the blood pressure.
  • The Rich analog functions make the new ASSP ideal not only for blood pressure monitoring systems but also for a wide array healthcare application including biosensors.
  • Samples of the RL78/H1D ASSP are available now. Pricing varies depending on the memory capacity, package and number of pins. For example, the R5F11NMG 80-pin LQFP package type with 128 KB flash ROM capacity is priced at US$3.50. The R5F11NMG includes an LCD controller for arm- and wrist-type blood pressure monitors, and a 4mm x 4 mm miniature ball grid array (BGA) package for use in wearable devices.

Renesas plans to expand its range of solutions for the healthcare field and will continue to contribute to the realization of a safe and secure smart society, including the development of smart connected devices for the industrial and healthcare industries.

 

The new blood pressure monitoring evaluation kit is scheduled to be available for order from May 10 priced at $600 per unit.

Renesas Electronics | www.renesas.com

1 W DC-DC Converters Medical Approved

MINMAX Technology has announced the MINMAX MAU01M / MSCU01M series, a new range of high performance 1 W medical safety approved DC-DC converters with encapsulated SIP-7 & SMD packages. They are specifically designed for medical applications. The series includes  models available for input voltages of 4.5 VDC to 5.5 VDC, 10.8 VDC to 13.2 VDC, and 21.6 to 26.4 VDC. The I/O isolation is specified for 4,000 VAC with reinforced insulation and ated for a 300 Vrms working voltage.

40e5a6c0900620d4a836fb17d0ef3ecbFurther features include short circuit protection, a low leakage current of 2 μA max. and operating ambient temperating range of -40°C to 95°C. This is achieved without de-rating and with a high efficiency of up to 84%. The MAU01M / MSCU01M series conforms to the 4th edition medical EMC standard. It meets 2xMOPP (Means of Patient Protection) per 3rd edition of IEC/EN 60601-1 & ANSI/AAMI ES60601-1. The MAU01M / MSCU01M series offer an economical solution for demanding medical instrument applications that require a certified supplementary and reinforced insulation system to comply with latest medical safety approvals under the 2x MOPP requirements.

MINMAX Technology | www.minmaxpower.com

December Circuit Cellar: A Sneak Preview

The December issue of Circuit Cellar magazine is coming soon. Want a sneak peak? We’ve got a great selection of excellent embedded electronics articles for you.

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 Here’s a sneak preview of December Circuit Cellar:

MICROCONTROLLERS IN MOTION

Special Feature: Electronics for Wearable Devices
Circuit Cellar Chief Editor Jeff Child examines how today’s microcontrollers, sensors and power electronics enable today’s wearable products.

329 Cover Screen CapSimulating a Hammond Tonewheel Organ
(Part 2)

Brian Millier continues this two-part series about simulating the Hammond tonewheel organ using a microcontrollers and DACs. This time he examines a Leslie speaker emulation.

Money Sorting Machines (Part 1)
In this new article series, Jeff Bachiochi looks the science, mechanics and electronics that are key to sorting everything from coins to paper money. This month he discusses a project that uses microcontroller technology to sort coins.

Designing a Home Cleaning Robot (Part 1)
This four-part article series about building a home cleaning robot starts with Nishant Mittal discussing his motivations behind to his design concept, some market analysis and the materials needed.

SPECIAL SECTION: GRAPHICS AND VISION

Designing High Performance GUI
It’s critical to understand the types of performance problems a typical end-user might encounter and the performance metrics relevant to user interface (UI) design. Phil Brumby of Mentor’s Embedded Systems Division examines these and other important UI design challenges.

Building a Robotic Candy Sorter
Learn how a pair of Cornell graduates designed and constructed a robotic candy sort. It includes a three degree of freedom robot arm and a vision system using a Microchip PIC32 and Raspberry Pi module.

Raster Laser Projector Uses FPGA
Two Cornell graduates describe a raster laser projector they designed that’s able to project images in 320 x 240 in monochrome red. The laser’s brightness and mirrors positions are controlled by an FPGA and analog circuitry.

ELECTRICITY UNDER CONTROL

Technology Spotlight: Power-over-Ethernet Solutions
Power-over-Ethernet (PoE) enables the delivery of electric power alongside data on twisted pair Ethernet cabling. Chief Editor Jeff Child explores the latest chips, modules and other gear for building PoE systems.

Component Overstress
When an electronic component starts to work improperly, Two likely culprits are electrical overstress (EOS) and electrostatic discharge (ESD). In his article, George Novacek breaks down the important differences between the two and how to avoid their effects.

AND MORE FROM OUR EXPERT COLUMNISTS:

Writing the Proposal
In this conclusion to his “Building an Embedded Systems Consulting Company” article series, Bob Japenga takes a detailed look at how to craft a Statement of Work (SOW) that will lead to success and provide clarity for all stakeholders.

Information Theory in a Nutshell
Claude Shannon is credited as one of the pioneers of computer science thanks to his work on Information Theory, informing how data flows in electronic systems. In this article, Robert Lacoste provides a useful exploration of Information Theory in an easily digestible way.

2.5 A Step-Down Regulator Keeps EMC/EMI Emissions Low

Analog Devices, which recently acquired Linear Technology, has announced the LTM8065, a µModule (power module) step-down regulator with up to 40 V input voltage (42 V abs max), which can safely operate from unregulated or fluctuating 12 V to 36 V input supplies in noisy environments such as industrial robotics, test and measurement, medical, factory automation and avionics systems. The Silent Switcher architecture minimizes EMC/EMI emissions enabling the LTM8065 to pass CISPR 22 class B for use in noise-sensitive signal processing applications, including imaging and RF systems. The LTM8065’s small 6.25 mm x 6.25 mm x 2.32 mm BGA package includes a switching regulator controller, power switches, inductor and other supporting components. With only two 0805 sized capacitors and two 0603 sized resistors, the LTM8065’s solution occupies approximately 100mm², about half the size of equivalent power level module solutions.

LTM8065The LTM8065 can deliver 2.5 A of continuous (3.5 A peak) output current to a 5 V load from a 12 V input at up to 85°C ambient without a heat sink or airflow. The output voltage is adjustable with one resistor from 0.97 V to 18 V. This wide output voltage range provides versatility, using one product to generate common system bus voltage of 3.3 V, 5 V, 12 V and 15 V. The switching frequency is adjustable by an external single resistor or can be synchronized to an external clock from 200 kHz to 3 MHz. It enables customer operation of the device in or out of the specific frequency. The LTM8065 has four modes: Burst Mode® operation, pulse-skipping mode, pulse-skip mode with spread spectrum modulation and external synchronization mode. The quiescent current at burst mode is 8 µA, making it ideal for battery operating systems.

The LTM8065 operating temperature range is –40°C to 125°C. 1,000-piece pricing starts at $7.75 each.

Analog Devices – Linear Technology | www.linear.com

New Reflective Optical Sensor for Industrial and Medical Applications

TT Electronics recently introduced the Photologic V OPB9000, which is a reflective CMOS logic output sensor with programmable sensitivity, output polarity, and drain select. It provides dependable edge and presence detection of reflective media under a wide range of ambient light conditions. The OPB9000 is well suitable for a variety of applications, including industrial printing, dispensing, manufacturing automation, security devices, and portable medical equipment.TT Electronics TT058

The OPB9000’s features, benefits, and specs:

  • Programmable sensitivity, output polarity, and drain select
  • 25+ kilolux ambient light immunity along with a wide operating temperature range
  • The self-calibration feature avoids the need for constant recalibration as the LED ages, saving valuable time and effort.
  • Temperature compensation and automatic gain control features
  • 6-µs response time ensures high-speed detection for time-critical applications.
  • Fully integrated analog front end and digital interface
  • Combines an infrared emitter and integrated logic sensor in a 4.0 mm × 2.2 mm × 1.5 mm surface-mount package

Source: TT Electronics