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1-Cell Li-ion Battery Protection IC with Built-in Driver for High-side Nch FETs and Temperature Protection

Posted on by mixos

RICOH has introduced R5445 Series of 1-Cell Li-ion battery protection IC with built-in driver for high-side Nch FETs and temperature protection. This new IC serves as Li+ / Li-polymer protector of overcharge, over-discharge, and over current for battery pack.

The R5445 Series IC can drive external high-side Nch MOSFETs and provide high-accuracy detection at overcharge and overcurrent, and a high-accuracy charge inhibition for 0V battery. Additionally, it can help reduce the supply current after over-discharge detection to a minimum by stopping the internal circuits. Using the CTL pin can forcefully enter the IC into standby mode.

Key Features of R5445 Series IC

  • 6.5 V Absolute Maximum Rating
  • Typ.5.0 µA Supply Current at Normal Mode
  • Max.0.04 µA Standby Current
  • 4.2 V to 4.6 V (in 0.005 V step, ±10 mV) Overcharge Detection Voltage

These ICs are suitable to be used as high precision protectors for smart-phones or any other electronic gadgets using on-board Li+ / Li polymer battery.

more information: https://www.n-redc.co.jp/en/pdf/datasheet/r5445-ea.pdf

Texas Instruments TMAG5170 Linear 3D Hall-Effect Sensor

Posted on by mixos

Texas Instruments TMAG5170 Linear 3D Hall-Effect Sensor is a high-precision Hall-effect sensor designed for a wide range of industrial and personal electronics applications. This high level of integration offers flexibility and accuracy in a variety of position sensing systems. The device features three independent Hall sensors at the X, Y, and Z axes. A precision signal chain and an integrated 12-bit ADC enable high accuracy and low drift magnetic field measurements while supporting a sampling of up to 20ksps. On-chip temperature sensor data is available for system-level drift compensation.

Integrated angle calculation engine (CORDIC) provides complete 360° angular position information for both on-axis and off-axis angle measurement topologies. The angle calculation is performed using two user-selected magnetic axes. The device features magnetic gain and offset correction to mitigate the impact of system mechanical error sources. The TMAG5170 can be configured through the SPI to enable any combination of magnetic axes and temperature measurements. Multiple sensor conversion schemes and SPI read frames help optimize throughput and accuracy. A dedicated ALERT pin can act as a system interrupt during low power wake-up and sleep mode and can also be used by a microcontroller to trigger a new sensor conversion.

The Texas Instruments TMAG5170 offers multiple diagnostics features to detect and report both system and device-level failures. The SPI communication features a user-enabled cyclic redundancy check to enhance the data integrity. The device is offered in two different types to support wide magnetic fields ranges from ±25mT to ±300mT. The device performs consistently across a wide ambient temperature range of –40°C to +150°C.

Features

  • High-precision linear 3D Hall-effect sensor to optimize position sensing speed and accuracy
    • ±2.6% (max. at 25°C) linear measurement total error
    • ±2.8% (max.) sensitivity temperature drift
    • 20Ksps conversion rate for single axis
  • 10MHz serial peripheral interface (SPI) with cyclic redundancy check (CRC)
  • Built-in temperature sensor with < ±2°C error
  • Independently selectable X, Y, and Z magnetic ranges
    • TMAG5170A1: ±25, ±50, ±100mT
    • TMAG5170A2: ±75, ±150, ±300mT
  • 5nA (typical) deep sleep mode current
  • Autonomous wake-up and sleep mode for threshold detection consuming only 1.5µA
  • ALERT function to initiate sensor conversion or indicate conversion complete
  • Integrated diagnostics for fault detection
  • Integrated angle CORDIC calculation with gain and offset adjustment
  • 2.3V to 5.5V supply voltage range
  • –40°C to +150°C operating temperature range

Block Diagram

more information: https://www.ti.com/product/TMAG5170-Q1

Arduino Releases Nicla Sense ME Board with a New Form Factor and 4x Bosch Sensors

Posted on by Emmanuel Odunlade

The latest entry in the Arduino Pro range is a sensor-packed edge AI board built in a very small footprint. Arduino entered into a partnership with Bosch to launch this new product that comes with a totally new form factor and boasts of edge AI acceleration, thanks to the 4 low-power sensors built into it.

The new Arduino® Nicla Sense ME board is based on the 6.5 x 6.5 x 1.2 mm ANNA-B112 Bluetooth 5.0 low energy module which features a Nordic Semi nRF52832 SoC with a 64MHz Arm® Cortex®-M4F microcontroller, a 64kB RAM, 512kB flash memory and Bluetooth 5.0 connectivity.

The board is equipped with four industrial-grade Bosch sensors namely:

  • BME688 temperature, humidity and pressure sensor that can also be used in determining the air quality index by detecting gases including Volatile Organic Compounds (VOC).
  • BMP390 high-accuracy pressure sensor operating between 300 – 1250 hPa with low drift
  • BMM150 low noise magnetometer with a typical range of ±1300μT in the X,Y axis and ±2500μT in the Z axis.
  • BHI260AP Smart Sensor with integrated 6 axis IMU (3-Axis Accelerometer + 3-Axis Gyroscope) for activity detection and is powered by a 32 Bit Synopsys DesignWare ARC™ EM4™ processor.

There’s also a 4-channel micro-DMA controller, a two-way associative cache controller, and a six-axis IMU with an accelerometer and accelerometer.

Other features include one micro USB port (USB-B), one connector for an optional lithium battery, one RGB LED (I2C), 10 digital I/O pins (of which 2 are shared with I2C and 4 are shared with SPI), 2 analog I/O pins (shared with PWM), 12 PWM pins (of which 2 are shared with analog, 2 are shared with I2C and 4 are shared with SPI), and 12 external interrupts. No Wi-Fi but there’s Bluetooth Low Energy connectivity that allows users to easily create their own BLE enabled projects. The board also comes with a JST 3-pin 1.2 mm pitch battery connector and supports the 3.7V Li-ion/Li-Po Single Cell battery. The power supply is 5V via USB/VIN.

The new Nicla form factor is Arduino’s most compact form factor yet. It weighs just 2g and measures 22.86 mm x 22.86mm in size, which is around 0.9 x 0.9 inches. According to the Arduino team, the Nicla form factor was developed specifically as

“a standard for wireless sensor networks which can be adapted by partners to develop custom-designed industrial solutions. Researchers and educators can use this platform to work on an industrially recognised standard for wireless sensor research and development that can shorten the time from concept to market.”

It is compatible with both breadboards and surface-mount installation on a carrier board.

Other useful information on the board, including the datasheet and pinout, can be found on the company’s website.

Pixblasters Announces New Firmware Updates for Its MS1 Video LED Controller

Posted on by mixos

Pixblasters™ has announced the release of new firmware updates for its Pixblasters MS1 Video LED Controller, which enables real-time control of extensive video LED displays built by addressable LED strips.

The firmware updates bring new FPGA LED controllers (ver. 107) that are immediately available to download free-of-charge from https://pixblasters.com/deliverables/

The latest Pixblasters firmware now includes full support for video control of 4-wire RGB LEDs with separated DATA and CLK digital inputs, such as APA102, HD107, SK9822, and others. When used in this control mode, the Pixblasters MS1 Video LED Controller supports 16 outputs, each driving 1,024 RGB LEDs, for a total of 16,384 LEDs controlled by a single controller. Video installations with more than 16,384 LEDs can be synchronously controlled by multiple and chained Pixblasters MS1 controllers.

Pixblasters 3-wire RGB LED support is also improved, and along with the WS2811, WS2812B, WS2815 and similar LEDs, now it also controls GS8208 LEDs.

Mirroring and padding functions are fully implemented. The mirroring function enables compact video LED installations with minimized cabling, e.g. two controllers placed centrally and side-by-side may control a 30 meter (~98 ft) long 30 mm pixel pitch LED ticker with all data cabling not longer than 0.5 meters. The padding function shifts the video image by a couple of pixels and enables outdoor LED strips to be taken out of a weatherproof control cabinet with no loss of first video pixel columns.

A new firmware update is applicable to all Pixblasters MS1 Video LED Controller boards currently deployed in the field. The firmware update procedure is simple and takes no more than a couple of minutes to complete.

Pixblasters has published the PAPP003 application note that describes the FPGA update procedure: https://pixblasters.com/wp-content/uploads/2021/09/papp003-Pixblasters-FPGA-Update-Guide_v1.0.pdf .

The complete procedure is also demonstrated by a short video clip

Demo

Datasheets

Aven Cyclops 3.0 Digital Microscope

Posted on by mixos

Aven Cyclops 3.0 Digital Microscope combines ease-of-use with advanced digital microscope technology in one compact device. The Cyclops 3.0 is an innovative digital microscope that connects directly to an HD monitor as well as a computer, or to both simultaneously with magnification ranges up to 140x. This microscope features built-in HDMI and USB outputs with 4x objective lens and image capture software that includes measurement and editing tools. In addition, the software provides Compare mode, Measurement mode, and Device Control mode. Aven Cyclops 3.0 Digital Microscope increases accuracy and productivity while easing eye strain and user fatigue.

Features

  • Advanced measurement software included for PC Mode (via download)
  • Crystal-clear 1080p full HD
  • USB C – High-speed transmission
  • Built-in 30 LED ring light
  • Included Measurement Software
  • Continuous calibration
  • USB 3.0 output
  • HDMI output

Specifications

  • Package Contents
    • Cyclops 3.0
    • Standard stand
    • USB cable
    • HDMI cable
    • Power supply
    • IR remote control
    • Calibrator
    • 4x objective lens
    • White balance card
    • User’s guide
  • Magnification 13x to 140x magnification
  • 1920*1080 effective pixels
  • 3.8mm to 40mm field of view
  • 22mm to 214mm working distance
  • 1.6A power consumption
  • -5°C to +50°C operating temperature range

more information: https://www.aventools.com/Cyclops-3.0-Digital-Microscope

Digitally Controlled MEMS Oscillator Enables Up to 25% Faster Wireless Charging Mobile and IoT Applications

Posted on by mixos

SiTime Corporation has released the SiT3901 µPower digitally controlled MEMS oscillator (DCXO) for power-sensitive and space-constrained mobile and IoT applications. Ideal for wireless charging systems for smartwatches, activity trackers, hearing aids, wearables, portable medical devices, this new oscillator enables the charger to dynamically tune the resonant frequency, maximizing power transfer and delivering up to 25% faster charging.

The digital control feature on the SiT3901 DCXO eliminates the need for additional passive components on the board, reducing the timing solution area by up to 90%. It offers high resilience to analog noise and stability over the temperature of ±50 and ±100 ppm.

Key Features of SiT3901 MEMS Oscillator

  • Ultra-low 105 micro-amps of current consumption (typical)
  • Ultra-wide digital pull range (up to 15%) for output frequency
  • Stability over the temperature of ±50 and ±100 ppm
  • Wide temperature range, from -40 degree C to +85 degree C
  • Ultra-small 1.5 mm x 0.8 mm package size
  • Programmable frequency from 1 MHz to 26 MHz
  • Ideal for space-saving applications
  • Helps reduce BOM costs

more information: https://www.sitime.com/products/digitally-controlled-oscillators/sit3901

TPS7A20 Ultra-Low-Noise Low Dropout (LDO) Linear Regulator

Posted on by mixos

Texas Instruments’ 300 mA, high PSRR regulator is suitable for battery-powered applications

Texas Instruments’ TPS7A20 is an ultra-small, low-dropout (LDO) linear regulator that can source 300 mA of output current. The device provides low noise, high PSRR, and excellent load and line transient performance that can meet the requirements of RF and other sensitive analog circuits. Using innovative design techniques, the TPS7A20 offers ultra-low-noise performance without adding a noise-bypass capacitor. This regulator provides the advantage of low quiescent current making it ideal for battery-powered applications. With an input voltage range of 1.6 V to 6.0 V and an output range of 0.8 V to 5.5 V, the TPS7A20 can be used for a wide variety of applications.

The device uses a precision reference circuit to provide maximum accuracy of 1.5% overload, line, and temperature variations. The TPS7A20 features an internal soft-start to lower the inrush current minimizing the input voltage drop during start-up. The regulator is stable with small ceramic capacitors, allowing for a small overall solution size. The TPS7A20 has a smart enable input circuit with an internally controlled pulldown resistor that keeps the LDO disabled even when the EN pin is left floating and helps eliminate the external components used to pulldown the EN pin.

Features

  • Low output voltage noise: 7 µVRMS
    • No noise-bypass capacitor required
  • High PSRR: 95 dB at 1 kHz
  • Input voltage range: 1.6 V to 6.0 V
  • Output voltage range: 0.8 V to 5.5 V
  • Output voltage tolerance: ±1.5% (max.)
  • Very low dropout:
    • 140 mV (max.) at 300 mA (VOUT = 3.3 V)
    • 145 mV (max.) at 300 mA (VOUT = 3.3 V, DBV)
  • Very low IQ: 6.5 µA
  • Low inrush current
  • Smart enable pulldown
  • Stable with 1 µF minimum ceramic output capacitors
  • Packages:
    • 1 mm x 1 mm X2SON
    • 0.603 mm x 0.603 mm DSBGA
    • 2.90 mm x 1.60 mm SOT23-5

Application Circuit

more information: https://www.ti.com/product/TPS7A20

Diodes Incorporated AP64200Q Automotive Synchronous Buck Converter

Posted on by mixos

Diodes Incorporated AP64200Q Automotive Synchronous Buck Converter fully integrates a 150mΩ high-side power MOSFET and an 80mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP64200Q design is optimized for Electromagnetic Interference (EMI) reduction.

The Diodes Incorporated AP64200Q Converter is easily used by minimizing the external component count due to its peak current mode control adoption. The device has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching. Additionally, the AP64200Q also features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time.

The AP64200Q is available in a SO-8EP package with a 3.8V to 40V input voltage range.

Features

  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1 -40°C to +125°C TA range
  • 3.8V to 40V VIN
  • 0.8V to VIN Output Voltage (VOUT)
  • 2A Continuous output current
  • 0.8V ±1% Reference voltage
  • 25µA Low quiescent current (pulse frequency modulation)
  • Adjustable switching frequency of 100kHz to 2.2MHz
  • External clock synchronization of 100kHz to 2.2MHz
  • Up to 88% efficiency at 5mA light load
  • Proprietary gate driver design for Best EMI reduction
  • Frequency Spread Spectrum (FSS) to reduce EMI
  • Low-Dropout (LDO) mode
  • Precision enable threshold to adjust UVLO
  • Protection circuitry
  • Undervoltage Lockout (UVLO)
  • Output Overvoltage Protection (OVP)
  • Cycle-by-cycle peak current limit
  • Thermal shutdown
  • Totally lead-free and fully RoHS compliant
  • Halogen and antimony free

Application Diagram

Block Diagram

more information: https://www.diodes.com/part/view/AP64200

Microchip Technology AT24CSWx Serial EEPROMs

Posted on by mixos

Microchip Technology AT24CSWx Serial EEPROMs are designed to be I2C compatible (two-wire) with a security register and software write protection. These EEPROMs feature bidirectional data transfer protocol and filtered inputs for noise suppression. The AT24CSWx EEPROMs operate at a 1.7V to 3.6V voltage range, 1mA ultra-low active current, 0.8µA standby current, and -40°C to 85°C temperature range. The AT24CSW01X / AT24CSW02X EEPROMs provide 8-Byte page write mode and AT24CSW04X / AT24CSW08X EEPROMs offer 16-Byte page write mode with partial page writing. These EEPROMs are available in 5-lead SOT23 and 4-ball ultra-thin WLCSP packages.

Features

  • Random and sequential read modes
  • Within 5ms self-timed write cycle
  • >4000V ESD protection
  • Software write protection of the EEPROM array:
    • Five configuration options
    • Protection settings can be made permanent
  • Bidirectional data transfer protocol
  • Schmitt triggers and filtered inputs for noise suppression
  • I2C-compatible (two-wire) serial interface:
    • 100kHz standard mode, 1.7V to 3.6V
    • 400kHz fast mode, 1.7V to 3.6V
    • 1MHz fast mode plus (FM+), 1.7V to 3.6V
  • AT24CSW01X / AT24CSW02X:
    • 8-Byte page write mode
  • AT24CSW04X / AT24CSW08X:
    • 16-Byte page write mode

Block Diagram

more information: www.microchip.com

EPC2216 – 15 V GaN Power Transistor

Posted on by mixos

The EPC2216 from Efficient Power Conversion is a GaN Transistor with Gate Threshold Voltage 0.7 to 2.5 V, Drain Source Voltage 15 V, Drain Source Resistance 20 to 26 milli-ohm, Continous Drain Current 3.4 A, Pulsed Drain Current 28 A.

Specifications

  • Configuration: Single
  • Gate Threshold Voltage: 0.7 to 2.5 V
  • Drain Source Voltage: 15 V
  • Drain Source Resistance: 20 to 26 milli-ohm
  • Continuous Drain Current: 3.4 A
  • Pulsed Drain Current: 28 A
  • Total Charge: 0.87 to 1.1 nC
  • Input Capacitance: 98 to 118 pF
  • Output Capacitance: 66 to 99 pF
  • Temperature operating range: -40 to +150 °C
  • Qualification: AEC-Q101
  • RoHS Compliant: Yes
  • Package-Type: Die
  • Package: BGA
  • Applications: High-Speed DC-DC conversion, Lidar/Pulsed Power Applications, Lidar for Augmented Reality Applications
  • Dimensions: 0.85 x 1.2 mm

more information: https://epc-co.com/epc/Products/eGaNFETsandICs/EPC2216.aspx

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