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STMicroelectronics L7983 step-down switching regulator

Posted on by mixos
The L7983 device is a step-down monolithic switching regulator able to deliver up to 300 mA DC based on peak current mode architecture

The L7983 device is a step-down monolithic switching regulator able to deliver up to 300 mA DC based on peak current mode architecture. The output voltage adjustability ranges from 0.85 V to VIN. The wide input voltage range and adjustable UVLO threshold meet the specification for the 12 V, 24 V, and 48 V industrial bus standards.

The “Low Consumption Mode” (LCM) is designed for applications active during idle mode, so it maximizes the efficiency at light load with a controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant, meeting the low noise application specification.

Key features

  • 3.5 V to 60 V operating input voltage
  • Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
  • 300 mA DC output current
  • Dynamic low consumption mode to low noise mode selection

Additional features

  • 3.5 V to 60 V operating input voltage
  • Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
  • 300 mA DC output current
  • Dynamic Low Consumption Mode (LCM) to Low Noise Mode (LNM) selection
  • 10 µA operating quiescent current (L7983PU33R, VIN > 24 V, LCM)
  • 2.3 µA shutdown current
  • 200 kHz to 2.2 MHz programmable switching frequency
  • Optional spread-spectrum (dithering)
  • Internal soft-start
  • Enable/adjustable UVLO threshold
  • Synchronization to an external clock
  • Internal compensation network
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Thermal shutdown

more information: https://www.st.com/en/power-management/l7983.html

STMicroelectronics L9026 Multi-Channel Relay Driver

Posted on by mixos

STMicroelectronics L9026 Multi-Channel Relay Driver is optimized for automotive LED and relay applications and is compatible with resistive, inductive and capacitive loads. The L9026 integrates two High-Side drivers and six configurable High-Side/Low-Side drivers and can be driven by SPI or by two dedicated parallel inputs. The device offers advanced diagnostic and protection functionalities such as short to GND, open load, overcurrent, and over-temperature detections. Limp Home functionality is also featured, which allows using two selected drivers in particular faulty conditions, such as SPI fault, micro fault, or supply UV. Daisy chaining is possible even with 8-bit SPI devices.

The L9026 Relay Driver features guaranteed operation undercranking scenarios down to VBATT = 3 V and provides very low quiescent current under RESET conditions. The SPI interface is used for control and configuration of the loads as well as of the device and status feedback of all diagnostic functions is provided. For direct control and PWM there are two input pins available which are connected to two defined outputs by default. Additional output mapping can be controlled by SPI.

The AEC-Q100 qualified STMicroelectronics L9026 Relay Driver is available in HTSSOP24 and VFQFPN32 package options. On the VFQFPN package 2 additional pins are available for safety reasons. The NRES pin is used to reset internal registers to their default values and the DIS pin is used to disable all channels.

Block Diagram

Features

  • AEC-Q100 qualified
  • 6x configurable High-Side/Low-Side drivers
  • 2x High-Side drivers
  • 2x parallel input pins with Input Mapping functionality
  • Cranking capability down to VBATT = 3.0V
  • Digital supply voltage compatible with 3.3V and 5.0V microcontrollers
  • Reverse battery protection on VBATT and on drain pins without external components
  • LED mode
  • Bulb Inrush Mode (BIM) to drive lamps and electronic loads
  • 2x internal PWM generators for microcontroller offload
  • Very low quiescent current with usage of IDLE pin
  • Limp Home mode with usage of IDLE and IN pins
  • Safety features
    • Temperature Sensor and Monitoring
    • Serial communications using address feedback, 1 parity bit, frame counter, and short frame detection
  • 16-bit Serial Peripheral Interface (SPI) for control and diagnosis
  • Daisy Chain capable SPI, also compatible with 8-bit SPI devices
  • HTSSOP24 and VFQFPN32 package options
  • Fully ISO26262 compliant, ASIL-B systems ready
  • Green Product (RoHS compliant)

more information: https://www.st.com/en/automotive-analog-and-power/l9026.html

Teknic’s brushless servo motors are now available online

Posted on by mixos

Hudson™ industrial grade brushless servo motors have been used by high-volume OEM companies for over a decade. These rugged, reliable motors have powered automated equipment in a variety of markets including medical, AOI, and CNC equipment (just to name a few). These field-hardened, OEM-grade motors are now available online in both fast-ship and built-to-order configurations.

Teknic has an impressive 4.94 star Google review rating. Here are just a few of the reviews:

  • “We’ve been using Teknic motors in our products for several years now. Their products are rock solid. Their engineering support, both during the prototyping phase and transition to production have been excellent. They are a great business partner.”
  • “My experience with Teknic spans the past 9 years, and has been excellent on all levels. Their products and support personnel are A+…”
  • “Fantastic motors and systems. Always eager to help, even newbies. Just wish we could rate them 10 out of 5.”

Some important Hudson™ brushless servo motor specifications/benefits include:

  • Designed, built and tested in the USA. The Hudson motors are thoughtfully designed for efficient manufacturability. This design combined with a high investment in automation equipment allows Teknic to cost-effectively build and test Teknic servo components in Upstate New York using skilled technicians.
  • Drive friendly. The Hudson motor non-proprietary, open-standard communication design allows the servo motors to be used with virtually any brushless servo drive regardless of protocol.
  • High performance. Fast electrical time constants and high torque-to-inertia ratios provide responsive, accurate dynamic performance.
  • Smooth and quiet. Industry leading innovations such as harmonically-pure windings, helically-skewed stator laminations, and custom-balanced EPM rotors provide exceptionally smooth, quiet motion.
  • Rugged and reliable. Brushless design, oversized and permanently lubricated brand-name bearings, Class H high-temperature winding (180ºC), fault-tolerant encoder design, fully sintered rare-earth magnets, and extensive testing of every servo motor assures high quality and lasting reliability.
  • High power density. Combining fully sintered Neodymium-Iron-Boron magnets with an optimized magnet shape, winding fill factor, stator skew angle and rotor geometry allows high power density and fade-free performance.
  • Ready to use right out of the box. The Hudson motors have an integrated encoder with commutation hall tracks, a dual-shielded pigtail, and a fully assembled connector (not “flying leads”). Even the consolidated phase and signal connector is designed to lower the cost of motor extension cables to save on installed costs.
  • Certifications. All Hudson servo motors are UL, ULc and CE rated for use at 24VDC through 340 VDC. Plus all motors are RoHS, REACH, and Conflict Mineral compliant.

World’s First! A Computer With Auto Heat-Up? DFI 3.5” Desktop CS551 Can Run Even At Subzero Temperatures

Posted on by mixos

As edge computing has been rapidly expanding to every corner, users pursue computers to drive more functions with better performance to enhance artificial intelligence analysis capabilities, which brings three new criteria in hardware selection for edge applications: processing power, size, and adaptability to extreme weather. DFI, one of the world-leading industrial PC providers, newly released the 3.5″ desktop single-board computer (SBC), CS551, is a perfect match for this situation with a breakthrough in aspects of size, footprint, operating temperature, cooling, and expansion.

High Performance With Small Footprint

Compared to most of desktop motherboards in the market that can only be merely downsized to Mini-ITX form factor (195mm (7.7″) x 170mm (6.7″)), DFI has further shrunk CS551 footprint by nearly half to 3.5″ (146mm (5.75″) x 102mm (4.02″), with support for the Intel Core™ 8/9 Gen processors and even the Intel C246 chipset that provides ECC support for memory at Intel Xeon server-grade level, maximizing the performance of the entire computer.

3.5” Desktop Platform With -30~80°C Wide Temp. Support

SBCs are prevailing in outdoor applications of Internet of Things due to small footprint, and to overcome the outdoor extreme temperature fluctuations, CS551 breaks the limitation of operating temperature merely support at 0~60°C by 8th /9th Gen Intel Core Processors, and further extends it up to 80°C, down to -30°C. Even the temperature drops below zero, the auto-on heater can warm up and keep the processor within the operating temperature range. Equipment can thus operate normally without being shut down in snow!

Dynamical Adjustment Between CPU & GPU

In addition to the powerful processor with wide temperature support, the CS551 also features the dynamical adjustment between CPU and GPU by allocating the computing resources according to the workload. Even in high temperature environment like 80°C, the computing work can be adjusted by the CPU and GPU intelligently, and prevent computer crash down as well as greatly improve the stability of the application.

Key Features:

  • 3.5″ Desktop Platform SBC -30~80°C
  • Unique Wide Tempe Support For Desktop Platforms
  • Dynamical Adjustment Of CPU/GPU Computing Resources
  • Enhanced Expansion Capabilities with M.2 2280 (e.g., Storage, I/O Cards)
  • Fanless & Fan Dual Cooling Systems Support

Key Applications:

  • Mission-critical applications in extreme temperature environments
  • AI visual analytics
  • Traffic flow analysis

2x Expansion Enhancement

Unlike other 3.5” SBCs on the market that only support M.2 2242 expansion, the CS551 increases the expansion capacity up to M.2 2280 size, making it perfectly compatible with M.2 2280 form-factor-only modules, as well as providing more than two times of the storage capacity and I/O expansion.

Fan/Fanless Dual Cooling Support

While the overall performance and expansion are increased by more than two times, the CS551 simultaneously supports fan cooling, which is commonly found on desktop platforms, as well as fanless cooling that is available only among SBCs. With the support for fanless cooling system, the lifespan of outdoor devices is largely increased and makes CS551 the only choice for developing smart outdoor applications in many extreme climates.

In the trend of the expanding scale of edge device deployment, having a computer with performance, size, and environmental resilience makes it barrierless in developing smart Internet of Things, and gives the equipment a 1+1>2, multiplier-effect benefits in performance!

more information: https://www.dfi.com/product/index/1472

+/-10V (Dual 10V) to Single-Supply Signal Converter for ADC

This board will make your work easy if you want to interface +/- 10V (Dual 10V) device or sensor to single-supply signal ADC. This tiny project has been made for industrial and process control applications and provides an easy interface between +/-10V (Dual 10V) sensor or device to single-supply ADC. Connect +/-10V sensor/device to pin 3 of connector CN1, and circuit outputs 0.5V to 4.5V at pin 3 of connector CN2. The operating supply of the circuit is 5V and it draws few milliamps of current. The project is also provided with optional precision Ref voltage for accurate output.

Testing this project is easy, close jumper J1 to VCC, J2 to GND, close the solder jumper J3, keep jumper J4 open, apply 5V DC to pin 1 and 2 of CN2, connect +/-10V source to pin 3 (+I) and GND. Measure the output at pin 3 (OP) of CN2.

Optional Reference Voltage: for precision output, use reference voltage chip U1 REF3425 or REF3225 from Texas, close Jumper J3, J4, and J1 to GND.

The INA159 is a high slew rate, G = 1/5 difference amplifier consisting of a precision op amp with a precision resistor network. The gain of 1/5 makes the INA159 useful to couple ±10V signals to single-supply analog-to-digital converters (ADCs), particularly those operating on a single +5V supply. The on-chip resistors are laser-trimmed for accurate gain and high common-mode rejection. Excellent temperature coefficient of resistance (TCR) tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. The input common-mode voltage range extends beyond the positive and negative supply rails. It operates on +1.8V to +5.5V single or split supplies. The INA159 reference input uses two resistors for easy mid-supply or reference biasing. The difference amplifier is the foundation of many commonly-used circuits. The INA159 provides this circuit function without using an expensive external precision resistor network.

Features

  • Operating Supply 5V DC
  • Input +/-10V (Dual 10V) Sensor or Industrial Device
  • Output 0.5V to 4.5V DC (ADC)
  • PCB dimensions: 26.51 x 16.51 mm

Schematic

 

Parts List

NOQNTY.REF.DESCMANUFACTURERSUPPLIERSUPPLIER PART NO
12CN1,CN24 PIN MALE HEADER 2.54MM PITCHWURTHDIGIKEY732-5317-ND
21C110uF/16V SMD SIZE 1210 OR 1206MURATA/YAGEODIGIKEY
31C20.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
41C31KPF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
52J1,J2JUMPER3PIN/SHUNTWURTHDIGIKEY732-5316-ND
62J3,J4PCB JUMPER/SOLDER JUMPER
72U1,R1DNP
82R2,R310E 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
91U2INA159AIDGKTTEXASDIGIKEY296-18688-1-ND
102SHUNT2.54MM PITCH FEMALESULINSDIGIKEYS9001-ND

Connections

Gerber View

Photos

Video

INA159 Datasheet

1.2V to 50V @ 3A – Adjustable Power Supply with 55Vdc Input

The project presented here is a wide input voltage range non-isolated DC-DC Converter, that provides a regulated, adjustable output voltage. The operating input supply is 55V DC and output regulated from 1.2V to 50V DC. The project built using LM2576HVT-ADJ IC. Screw terminals provided for easy input and output connections, onboard power LED at the input, bridge rectifier for AC/DC Input, an onboard potentiometer to adjust the output voltage, etc. This is a low-profile board with a thermal area on PCB that acts as a heatsink. An additional LC filter using C5 and L2 that reduces the output ripple by a factor of 10 or more is included in this circuit. The device has a current limiting feature to prevent the switching current from exceeding a safe value during an accidental overload on output.

LM2576 Description

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include fault protection and a fixed-frequency oscillator. The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases, no heat sink is required. A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Note: The board works with DC input and due to the onboard rectifier the input polarity is not a problem. This project can also work with AC input, use appropriate filter capacitor for AC input needed, CX capacitor provision helps you to use THT capacitor at input DC line.

Features

  • Input voltage 55V (it can work with Lower Input DC Supply, but the output will be lower)
  • Bridge Rectifier at the input so No polarity issue in DC input
  • Adjustable version output voltage range: 1.23 V to 50 V ±4% maximum over line and load conditions
  • 3A output current (Maximum)
  • Cycle-by-Cycle Peak Current Limit for Overload Protection
  • Power LED at input
  • Onboard Potentiometer for Output Voltage Adjust
  • Screw Terminal for Inputs and Output Connection
  • Additional Inductor and Capacitor to reduce the Ripple
  • 52-kHz Fixed-frequency internal oscillator
  • Thermal shutdown and current limit protection
  • PCB Dimensions 85 x 71.60 mm

Schematic

Parts List

NOQNTY.REFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
11CN12 PIN SCREW TERMENAL 5.08MM PITCHWIEDMULLERDIGIKEY281-2888-ND
21CN22 PIN SCREW TERMENAL 5.08MM PITCHWIEDMULLERDIGIKEY281-2888-ND
31C11uF/100V SMD SIZE 1206MURATA/YAGEODIGIKEY
43C2,C5,C8100uF/63V SMD NICHICONDIGIKEY493-6185-1-ND
52C32200uF/63V THT NICHICONDIGIKEY493-1360-ND
65R1,J1,C4,C6,C7DNP
74D1,D2,D3,D41N5408ON SEMIDIGIKEY1N5408FSTR-ND
81D5RED LED SMD SIZE 0805OSRAMDIGIKEY475-1415-1-ND
91D6MBRS360ON SEMIDIGIKEYMBRS360T3GOSCT-ND
101L1150uH/5A 30MM DIABOURNSMOUSER652-2200LL-151-H-RC
111L220uH OR 12uH/4.5A 12MMX12MMBOURNSDIGIKEYSRR1260-120MTR-ND
121P150K POT 16MMBOURNSDIGIKEYPDB181-K415K-503B-ND
131R24.7K 5% SMD 2512 OR 1210MURATA/YAGEO
141R31.21K 1% SMD SIZE0805MURATA/YAGEO
151U1LM2576HVT-ADJ TO220TEXASDIGIKEYLM2576HVT-ADJ/NOPB-ND

Connections

Gerber View

Photos

Video

LM2576 Datasheet

Texas Instruments TMAG511x 2-Dimensional Dual Hall-Effect Latches

Posted on by mixos

Texas Instruments TMAG511x 2-Dimensional Dual Hall-Effect Latches operate from a 2.5V to 38V power supply. Designed for high-speed and high-temperature motor applications, these devices are optimized for applications leveraging rotating magnets. Integrating two sensors and two separate signal chains, the TMAG511x offers two independent digital outputs, giving speed and direction calculation (TMAG5111) or giving directly the digital output of each independent latches (TMAG5110). This high level of integration allows the use of a single TMAG511x device instead of two separate latches.

The device is offered in a standard 3mT operating point, as well as a high-sensitivity 1.4mT operating point. The higher magnetic sensitivity provides flexibility in low-cost magnet selection and mechanical component placement. The Texas Instruments TMAG511x is also available in three 2-axis combination options (X-Y, Z-X, Z-Y) to allow flexible placement of the sensor relative to the magnet. The device performs consistently across a wide ambient temperature range of –40°C to +125°C.

Features

  • 2D sensing with planar and vertical hall sensors
  • Inherent quadrature independent of magnet alignment or magnet pole pitch
  • Two functional options available:
    • TMAG5110 – independent 2D outputs
    • TMAG5111 – speed and direction outputs
  • Ultra-high magnetic sensitivity
    • TMAG511xx2 – ±1.4mT (typical)
    • TMAG511xx4 – ±3mT (typical)
  • Fast 40kHz sensing bandwidth
  • 2.5V to 38V operating VCC range
  • Open-drain output (10mA sink)
  • Wide ambient operating temperature range
    • –40°C to +125°C
  • Protection Features
    • Reverse Supply Protection (up to –20V)
    • The device survives up to 40V
    • Output Short-Circuit Protection
    • Output Current Limitation

more information: https://www.ti.com/product/TMAG5110

MPM3632S High-Frequency 18 V/3 A DC/DC Regulator with Integrated Inductor

Posted on by mixos

MPS’ MPM3632S offers full protection features, including output OVP, OCP, and thermal shut down

MPM3632S from Monolithic Power Systems is asynchronous, rectified, step-down, mini-module regulator with built-in power MOSFETs, an inductor, and two capacitors. It offers a compact solution with only input and output capacitors to achieve a 3 A continuous output current with excellent load and line regulation over a wide input supply range. The device operates in a fixed 2.2 MHz switching frequency with constant on-time (COT) control to provide a fast load transient response. The MPM3632S offers full protection features, including output overvoltage protection (OVP), overcurrent protection (OCP), and thermal shut down. The MPM3632S is available in an EC LGA-10 (3 mm x 3 mm x 1.45 mm) package.

Features

  • Wide 4 V to 18 V operation input range
  • 0.5% accuracy output voltage
  • 3 A continuous output current
  • 2.2 MHz switching frequency
  • Power good indicator
  • Hiccup OCP protection
  • Output OVP protection
  • Fast transient response
  • Internally fixed soft-start time
  • Forced CCM mode
  • Available in an EC LGA-10 (3 mm x 3 mm) package

more information: https://www.monolithicpower.com/en/mpm3632s.html

Würth Elektronik introduces its WSEN-HIDS humidity sensor

Posted on by mixos

Würth Elektronik has developed a micro-electro-mechanical system (MEMS) sensor only 2 × 2 × 0.9 mm in size. Thanks to its low energy requirement and its calibrated and temperature-compensated digital output, the sensor measures humidity and temperature with long-term stability. The WSEN-HIDS humidity sensor is based on advanced MEMS technology: A dielectric polymer absorbs or releases water molecules in proportion to the relative humidity in the surroundings, thereby changing the permeability of a capacitor structure. The humidity sensor with integrated analog-digital converter and temperature sensor can be connected to commonly used microcontrollers via an I2C or SPI interface. With the help of the software development kit, which is also available, there is no faster/easier way to individually set data rates and use the interrupt pin.

Alongside classical applications, such as heating, ventilation, air conditioning, building automation, and cooling systems, thanks to its small size and minimized energy requirement, the WSEN-HIDS humidity sensor is also suitable for dataloggers, as well as stationary and portable IoT applications. For modern applications, Würth Elektronik provides developers with an evaluation board. The MEMS sensor delivers calibrated measurement results with superb accuracy of ±3.5% RH in the 20% to 80% RH humidity range. The sensor outputs at a data rate in the millisecond range. Condensate forming on the surface of the polymer structure can be removed again by activating a built-in heater – so the sensor can generate measured data again within a very short time. The operating temperature range of the robust sensor is –40 to +120 °C.

Characteristics

  • MEMS based capacitive sensing principle
  • Relative humidity range 0% to 100%
  • Embedded analog to digital converter
  • Fully calibrated 16 bit humidity and temperature output
  • I²C and SPI communication interface
  • Selectable output data rate up to 12.5 Hz
  • Operating temperature range: -40 °C to 120 °C
  • Sensor Software Development Kit
  • Sensor SDK User Manual

Easy to integrate

“With WSEN-HIDS, we are pleased to be able to offer one of the most innovative humidity and temperature sensors. The sensor promotes rapid terminal device development because developers can use a digital output directly via I2C or SPI and do not have to worry about calibration or temperature compensation,” explains Vinod Kumar Ramu, Product Manager at Würth Elektronik eiSos. “Very practical: The sensor’s interrupt pin can also be used to wake up the microcontroller if the humidity changes. This is ideal for economical and low-maintenance monitoring functions.”

The current consumption of the humidity sensor is 8.9 µA in continuous operation with measurement data available every second. Using a CR2032 button cell with 230 mAh capacity, this corresponds to a battery life of about three years. If the sampling rate is reduced, applications stay maintenance-free even longer.

The sensor is now available from stock without a minimum order quantity as a belt section or tape & reel package.

more information: https://www.we-online.com/catalog/en/WSEN-HIDS

TinyCharger – Single Cell Li-Ion Battery Charger with Monitoring

Posted on by mixos

TinyCharger is an ATtiny25/45/85-based, single-cell Li-ion battery charger with selectable charging current limit (100mA – 1000mA) and an OLED display for monitoring.

For battery charging the TP4056 is used. The TP4056 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. The maximum charge voltage is fixed at 4.2V and the charge current can be programmed externally with a resistor. The total resistance is determined by three resistors connected in parallel, two of which can be switched on and off by the ATtiny via MOSFETs. The TP4056 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. Other features include current monitor, under voltage lockout and automatic recharge.

An INA219 is used to measure voltage and current. The INA219 is a current shunt and power monitor with an I²C-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. The selected shunt resistance of 8 milliohms enables both a very small influence on the circuit and a measurement with a resolution of 1 milliampere. For an accurate measurement, a shunt resistor with a low tolerance (1% or better) should be selected.

You can get the source files and details of this project on GitHub.com

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