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Infineon Technologies 6EDL7141 Gate Driver IC

Posted on by mixos

Infineon Technologies 6EDL7141 Gate Driver IC is designed for 3-phase BLDC or PMSM motor drive applications. The 6EDL7141 features three half-bridge drivers, each capable of driving a high side and low side N-type MOSFET. Furthermore, the device is provided with programmable dead time delays for preventing current shoot-through between HS and LS switches in normal operation.

The Infineon 6EDL7141 Gate Driver IC has separate charge pumps for low and high-side gate drivers that support a 100% duty cycle and a low voltage supply operation. The gate drivers are programmable to 7V, 10V, 12V, or 15V supplies. The slew rate of the driving signal is programmed with fine granularity to reduce EMI emissions.

The 6EDL7141 implements numerous protection features for improving application robustness during adverse conditions like monitoring of power supply voltages and system parameters.

The integrated SPI offers both detailed fault reporting and flexible parameter settings such as gain of the current sense amplifiers, slew rate control of the gate drivers, various protection features, or gate driver voltage.

Features

  • 3-phase smart gate driver
    • 5.5V to 60V operating supply voltage (recommended operating condition)
    • 1.5A sink/1.5A source peak gate driver currents
    • Programmable driving voltage (7V, 10V, 12V, 15V)
    • Independently programmable high side/low side slew rate control
    • Independently programmable dead time for turn on/off switching
    • Control using 3PWM or 6PWM inputs up to 200kHz
    • Built-in commutation tables for using 1PWM with or without Hall sensors
  • Integrated power supplies
    • High-efficiency synchronous buck converter with a programmable switching frequency
    • Supplies gate driver charge pumps, DVDD linear regulator, and both internal and external components
    • Linear regulator with 300mA current capability for MCU and other components supply (DVDD)
    • Dual charge pump for supplying gate driver even at low supply voltage
  • Three integrated current sense amplifiers
    • Adjustable gain and offset
    • Configurable low side RDSON sensing
  • Three integrated Hall sensor comparators
  • Integrated ADC for signal monitoring
  • Locked rotor detection
  • 3.3V/5V compatible digital interface
  • Programmable SPI digital interface
  • Protection features
    • External brake with programmable braking response
    • Over-Current Protection (OCP) on current-sense amplifiers (programmable)
    • Over-Current Protection (OCP) for buck converter and DVDD linear regulator (programmable)
    • Under-Voltage Lockouts (UVLO) for internal and external supplies
    • Over-Voltage Fault (OVLO) reporting for buck converter and DVDD linear regulator
    • Over-Temperature warning and shutdown (OTW, OTS)
    • Programmable watchdog timer
    • Reporting through nFAULT and SPI registers
  • Thermally enhanced 48pin VQFN package

Block Diagram

more information: https://www.infineon.com/cms/en/product/power/motor-control-ics/bldc-motor-driver-ics/battery-supplied-bldc-motor-controller-ics/6edl7141/

e-con Systems launches 4K HDR USB 3.1 UVC camera based on AR0821

Posted on by mixos

High Dynamic Range | Large pixel size (1/2” sensor) | 1080p@60 & 4K@30 fps

e-con Systems Inc., a leading embedded camera solutions provider launches an 8MP USB 3.1 color HDR camera See3CAM_CU81 based on the AR0821 CMOS image sensor from On Semiconductor, with an inbuilt Image Signal Processor (ISP).

See3CAM_CU81 is an 8MP fixed focus UVC compliant USB 3.1 camera with large pixel size which can capture high quality images in various lighting conditions. This 4K camera comes with the High Dynamic range (HDR) capability which uses multiple exposures in a single frame to bring out details in the brightest as well as darkest areas of the same scene in high-contrast lighting conditions. See3CAM_CU81 has an inbuilt high-performance Image Signal Processor (ISP) that performs all the auto functions (auto white balance, auto exposure). The ISP and sensor have been fine tuned for achieving excellent image quality.

High Signal to Noise ratio of this camera helps to produce videos and images with low noise even in poor lighting conditions. It comes with an M12 (S-mount) lens which allows customers to choose the lens of choice according to their application needs.

See3CAM_CU81 with features like HDR, 4K ultra-HD resolution, large pixel size, and high Signal to Noise Ratio (SNR) is suitable for a wide variety of applications such as digital signage, biometric & access control, sports broadcasting & analytics, smart surveillance, smart traffic management, and other applications that require big data analytics.

Key Features

  • 4K resolution with large pixel size (1/2” sensor) – Provides high-quality images to cover wide field of view with great details
  • High Dynamic Range (HDR) – Enables to capture excellent images in high contrasting lighting conditions
  • High Signal to Noise Ratio (SNR) – Helps to achieve quality images with low noise even in poor lighting conditions
  • USB 3.1 interface – Streams Full HD@60, 4K@30fps in linear mode and 4K@30fps in HDR mode.
  • UVC compliant – Plug-and-Play setup, no additional drivers required for Windows and Linux OS

See3CAM_CU81 is a Ready-to-Manufacture camera board with all the necessary firmware built in and compatible with the USB Video Class (UVC) version 1.0 standard. This camera board will work with the standard drivers available in Windows and Linux OS without any additional driver installation. Being a plug and play camera, integrating See3CAM_CU81 into end products will help customers reduce their time to market and product development efforts.

The camera is exposed as DirectShow capture source to Windows PC. And e-con Systems provides a sample DirectShow application called e-CAMView for video streaming and still capturing from the USB camera device with a user-friendly Graphical User Interface. In Linux, See3CAM_CU81 is exposed as a V4L2 camera and e-con Systems provides a sample application called QtCAM for streaming. Customers can also develop customized applications for See3CAM_CU81 using standard V4L2 APIs. e-CAMView and QtCAM enable controls such as brightness, contrast, sharpness, saturation, gamma, gain, exposure (manual and auto), and white balance (Manual and Auto).

Availability

Customers interested in evaluating See3CAM_CU81 – 8MP HDR fixed focus USB3.1 camera – can purchase the product from e-con Systems’ online store.

6V – 2.5Ah Sealed Lead-Acid Battery Charger

Posted on by mixos

This dual-level float charger was designed for a 6V (three 2V cells) 2.5Ah battery. D2 LED was added for visual indication of charge completion, D3 indicates power, D4 LED presents overcharge condition, etc. 6V lead-acid battery charger is built using the UC3906 chip. UC3906 contains all of the necessary circuitry to optimally control the charge and hold cycle for sealed lead-acid batteries. UC3906 IC monitors and controls both the output voltage and current of the charger through three separate charge states; a high current bulk-charge state, a controlled over-charge, and a precision float-charge, or standby state. Optimum charging conditions are maintained over an extended temperature range with an internal reference that tracks the nominal temperature characteristics of the lead-acid cell. A typical standby supply current requirement of only 1.6mA allows these ICs to predictably monitor ambient temperatures. Separate voltage loop and current limit amplifiers regulate the output voltage and current levels in the charger by controlling the onboard driver. Voltage and current sense comparators are used to sense the battery condition and respond with logic inputs to the charge state logic.

6V – 2.5Ah Sealed Lead-Acid Battery Charger – [Link]

Full Wave Rectifier Using Single Supply OPAMP

Posted on by mixos

This is a Full wave rectifier project built using MAX44267 dual OPAMP which provides true zero output with a single supply. The circuit converts Bipolar/AC input into full-wave output. CN1 is provided for sinewave input, CN2 helps to connect the power and output. Operating supply 15V DC, D1 power LED.

The MAX44267 precision, low-noise, low-drift dual operational amplifier offers true-zero output that allows the output to cross zero maximizing the dynamic range of an ADC and increasing resolution. In addition, the input common-mode range extends from +13.5V down to -12V. The MAX44267 integrates charge-pump circuitry that generates the negative voltage rail in conjunction with external capacitors.

Full Wave Rectifier Using Single Supply OPAMP – [Link]

UTP, FTP, S/FTP? Small Refresh Might Be Useful

Posted on by mixos


Are you also sometimes not sure whether you are using the correct data cable acronyms that are mostly used for Ethernet? UTP vs FTP, STP vs FTP. Let’s have a look at the difference between them.

Today we already know that if someone 20-30 years ago felt that the Internet would be a “big thing”, they were right.

However, only few seem to have assumed that the Internet would have such a strong impact on industry and the private sector.

In case of industrial applications, the currently evolving “Single Pair Ethernet” (SPE) technology is even more advantageous. It is mainly due to the simplification of installation and significant space and cable costs savings.

Despite the rise of wireless technology, wired installations have their advantages and they remain a major pillar for data communications, especially in industry.

Construction of data cables can be made of solid conductors as well as stranded ones. Solid core cables are suitable especially for fixed installations. Cables with a stranded construction are much more flexible and are especially suitable for flexible installations, production of patch cables and the like.

Thanks to the Internet being used at work and also at home, perhaps everyone has at least heard acronyms used for cables, such as UTP or FTP. However, many times we use the same acronym to refer to quite different cables, which we encounter especially in various articles, blogs, Internet discussions and elsewhere.

Let’s have a brief recap of the meaning and differences between the individual cables, as it is defined in ISO/IEC 11801:200. An explanation of the nomenclature, as well as a clear table, will certainly be of help.

… read more

BD71631QWZ Battery Charger

Posted on by mixos

ROHM’s linear charger for low-voltage batteries achieves low-voltage charging over a wide range by improving the stability of the internal circuit

ROHM has developed a battery charger IC that supports low-voltage charging of not only lithium-ion but also all-solid and semi-solid state rechargeable batteries that use novel materials for the electrode part and batteries that adopt different terminal compositions. The BD71631QWZ achieves low-voltage charging over a wide range from 2.0 V to 4.7 V by improving the stability of the internal circuit.

Features

  • Compatible with all-solid/semi-solid state rechargeable batteries requiring low-voltage charging
  • Package size optimized for applications equipped with thin rechargeable batteries
  • Achieves optimal CCCV charging according to the characteristics of the rechargeable battery

more information: https://www.rohm.com/products/power-management/battery-management/battery-charge-management-ics/bd71631qwz-product

AST3TDA and AST3TDA53 Ultra-Performance TCXO Series

Posted on by mixos

Abracon’s precision SMD VC/TCXO devices are designed to meet emerging 5G infrastructure requirements

Abracon’s AST3TDA and AST3TDA53 temperature-controlled oscillator (TCXO) series deliver reliable, high-precision timing operation in compact form factors for emerging 5G applications facing increased performance demands and space constraints.

The AST3TDA and AST3TDA53 devices are ideal for meeting design requirements for 5G infrastructure applications such as macro base stations (AAU, DU/CU), small cells (micro, pico, femto), and Wi-Fi 6/6E networking.

Rising data capacity needs of connected, cloud-driven technology is propelling 5G network densification. These developing telecom and networking equipment require components that can support the heightened quality of service (QoS) demands over extended temperature operation while alleviating increased board space pressures.

The ultra-precision reference oscillators are designed to provide superior frequency stability performance (sub ±100 ppb) over wide operating temperatures (-40⁰C to +105⁰C) for emerging 5G-centric systems. Additionally, Abracon has optimally configured these solutions to simultaneously provide state-of-the-art, close-in phase noise performance. For example, the AST3TDA53 series exhibit ±280 ppb stability over temperature with better than -150 dBc/Hz @ 10kHz offset in a miniature 5.0 mm x 3.2 mm package. The AST3TDA series can sustain frequency stabilities as tight as ±50 ppb in a 7.0 mm x 5.0 mm x 2.2 mm package size.

Features

  • Wide operating temperature range (-40ºC to +105ºC) with high stability options
  • Standard frequencies available: 10 MHz, 12.8 MHz, 16.384 MHz, 18.432 MHz, 19.2 MHz, 19.44 MHz, 20 MHz, 30.72 MHz, 38.88 MHz, 40 MHz, and 50 MHz
  • Most popular industry package sizes offered
  • CMOS or clipped sine wave output
  • Voltage controlled (VCTCXO) options available

more information: https://abracon.com/datasheets/AST3TDA.pdf

5.0″ Sunlight-Readable TFTs

Posted on by mixos

Newhaven Display’s TFTs have a powerful backlight to make them visible in bright lighting conditions, including direct sunlight

Newhaven Display’s 5″ TFT LCDs are available with sunlight-readable screen technology and deliver superior brightness. This addition of sunlight readable TFT LCD modules features 3M enhancement film and LED backlights rated up to 1,000 cd/m2 to deliver brightness levels suitable for any environment, including direct sunlight. The 5″ sunlight-readable TFTs are also available with added capacitive touch panel.

Features

  • 800 x 480 pixels
  • 3.3 V LCD
  • 24-bit parallel RGB interface
  • MVA viewing angles: 70°
  • High-brightness white LED backlight: 1,000 cd/m2
  • Transmissive
  • Wide temperature range: -20°C to +70°C
  • RoHS compliant

more information: https://www.newhavendisplay.com

ENC series of 24-bit photoelectric coded switches

Posted on by mixos

Waltham has introduced the ENC series 24-bit photoencoders with integrated pushbuttons.

Based on improvements to the already successful 16-bit optical encoder, we developed this new encoder. In addition to a 50% increase in braking position, the 24-bit encoder also includes a right-angle connector socket (which is often requested by users), making it easier for users to install. The central encoder axis can be rotated smoothly and precisely, making functions such as mode selection and menu navigation easier to operate, as well as fast and accurate responses to user input. Pressing down on the encoder axis activates the integrated button, making the encoder a way of interface control. This all-in-one, clean design makes the operation of the encoder as easy as clicking a button.

The new 24-bitcentral selector switch is smooth to the touch and enables fast rotation. The output of the encoder’s 2-bitrating code makes it very easy to detect the direction and amplitude of rotation by any microcontroller the user prefers.

The ENC series of 24-bitencoders are ideal for applications such as in-car entertainment clustering, navigation and volume control buttons. It is also suitable for applications in medical devices such as menu navigation, power cycling and strength regulation. In industrial environments,it performs well in mode selection and other similar features of the control panel.

“TheENCseries of 24-bitencoders builds on the success of the ENCseries, providing users with more functional and featured products while making installation easier. C&K’scomprehensive focus on user expectations and needs reflects our ongoing commitment to providing the solutions users need to create the high-quality products and services they expect.”

To learn more about C&K’snew ENCseries of 24-bitoptoelectronic switches, including details and specifications, please click on the links below:

https://www.ckswitches.cn/products/switches/product-details/Rotary/ENC/

ACEINNA Launches High Power Current Sensor

Posted on by mixos

ACEINNA announced the high current ±65 Amp MCx1101 Current Sensor, the industry’s most accurate and highest bandwidth current sensor. Designed for WBG (wideband gap) applications, and available in 3.3- and 5-Volt versions, this highly accurate, wide bandwidth AMR-based (Anisotropic Magnetoresistive) current sensor is ideal for a wide range of next generation power systems and applications. Units are now available for sampling and volume shipments.

The MCx1101’s fast response and high bandwidth is ideal for fast switching SiC and GaN based power stages and enables power system designers to make use of the higher speeds and smaller components enabled by wide band-gap switches. Output step response time is just 0.3 µs. The MCx1101 also provides an integrated over current detection flag to help implement the OCD (Over Current Detection) required in modern power systems. Over-current detection response time is a fast 0.2 µs.

“ACEINNA’s MCx1101 current sensors are fully integrated, bi-directional and provide much higher DC and AC accuracy and dynamic range compared with alternative solutions,” says Teoman Ustun, VP of Marketing, ACEINNA. “For example, the new ±65 Amp versions have a typical accuracy of ±3%. This new current sensor utilizes an industry standard SOIC-16 package with a low impedance (0.9 milli-ohm) current path and are UL/IEC/EN60950-1 certified for isolated applications.”

This new current sensor delivers a unique combination of high accuracy, 1.5 MHz signal bandwidth with industry benchmark phase shift vs. frequency, fast output step response and 4.8 kV isolation making them ideal for current sensing in fast current control loops and protection for high performance power supplies, inverters, and motor control applications.

In addition to the new ±65 Amp version, ACEINNA’s current sensor family includes ±50, ±20, and ±5 Amp ranges, and is offered in both fixed gain (MCA1101) and ratiometric gain (MCR1101) versions.

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