Reference Designs and Demos

The 15W Wireless Power Transmitter board, based on the dsPIC® Microcontroller, is compatible with Qi medium power receivers. The development board enables a system efficiency of about 80% at full load and includes status LEDs and LEDs for power level indication.

Microchip’s dsPIC® Digital Signal Controllers (DSCs) offer a strong feature set for wireless power/charging applications in multiple market segments. The devices include a powerful CPU core, multiple PWM generators and advanced analog modules, allowing the customization of solutions. The multiple PWMs allow the control of the full bridge inverter and a front end Buck-Boost converter (required for fixed frequency topologies). In applications where the final solution requires the implementation of a proprietary protocol in addition to the standard, the dsPIC® DSC is ideal because of its computation capability. The CAN/LIN feature in the dsPIC® DSC makes it a good fit for automotive in-car wireless charging. The software structure can be setup efficiently for wireless charging such that basic kernel functions are packaged in library form and add-on/customized functions (such as foreign object detection, CAN, I2C etc.) are provided as API interfaces.

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The 200W  Wireless Power reference design implements a proprietary protocol developed from several years of R&D and granted U.S patents in the field of wireless power. The 200W solution is ideal for applications such as Power Tools, Vacuum Robots, Industrial Slip Rings, Small Electric Vehicles and Drones.

The Transmitter can be powered from an 8- 24V D.C input and the receiver can regulate it's output voltage within this range. The system operates at 90% efficiency at 100W power and a Z-distance of 5-10mm.



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Microchip’s 750W AC-DC Reference Design demonstrates a semi-bridgeless PFC topology followed by a peak current controlled zero-voltage switching full-bridge (ZVS FB) converter with digital slope compensation to achieve very high conversion efficiencies. This power supply can be firmware updated (including the compensator algorithm) with zero down time to the system it is powering while the power supply is running. It is implemented using two dsPIC33EP “GS” digital-power DSCs that provide full digital control of the power conversion as well as all system management functions.

The ZVS FB Converter is designed to stepdown an input DC voltage of 400V to an output DC voltage of 12V. A unique feature of the reference design is the implementation of peak current control, using a fully software-based slope compensation algorithm, which eliminates the use of external analog components for slope compensation. The 750W AC/DC Reference Design is royalty free when used in accordance with the licensing agreement.

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Air conditioner (A/C) designs need to meet stringent energy efficiency ratings and power factor specifications to reduce overall power consumption. High energy efficiency is achieved by using an inverter-based variable speed drive for the brushless motor-based compressor and condenser fans. The variable speed drive and the sensorless field-oriented control (FOC) of brushless motors allow an appliance to operate at an optimal power setting compared to a fixed speed single phase AC induction motor (ACIM) drive. Power factor correction (PFC) is required for all high-power appliances to connect to the electrical grid.

Microchip’s Air Conditioner reference design, based on the dual core dsPIC33CH family of digital signal controllers, demonstrates efficient control of the condenser fan, compressor, PFC and the overall application logic implementation. The high-performance dsPIC33C DSCs (Dual core dsPIC33CH DSCs and Single core dsPIC33CK DSCs) offer the right set of peripherals that is ideal for dual motor control and enables replacing three controllers with one for a cost advantage in your design.

This reference design has proven power stages for high power PFC (220V, 1.8 KW), condenser fan (120 W) and compressor (1.34 KW) motor control. Additional features like temperature sensor interfaces, field communications and valve drives will enable you to develop on this platform for a wide variety of air conditioner systems like window A/Cs and the outdoor unit of split A/Cs.

Read more about the cost advantage of our air conditioner reference design.

Ready for a live demonstration? This reference design is provided with full user’s guide, source code, schematics and PCB layout. Contact Microchip sales for demonstration, design files and firmware.

Benefits

• Single chip solution to optimize cost 

• Simplifies the development by enabling independent code development for the PFC and Dual motor control using the dual core dsPIC33CH DSCs 
  • Slave core implements dedicated time-critical dual motor control algorithms  
  • Master core implements Interleaved Boost PFC, system functions and other custom features 
• 3-phase motor control power stage for driving Low Power High Voltage BLDC/ PMSM motors

The ASC-70 compact isolation transformer is our first generation of small desktop transformers with a power rating of 70 VA max. It offers safety isolated short circuit proof AC voltage, current and power ratings for a multitude of applications for daily use in laboratories, schools or workshops. The model supports US and EU input voltage range by providing 12 VAC and 24 VAC unregulated voltage at the output.

Can be used along with Low Voltage PFC Development Board to provide and isolated short circuit proof voltage (12VAC / 24VAC)

This is currently not available for sale on microchipDirect.

For more information, pls contact your regional Microchip's sales executive.

The Digital Compensator Design Tool (DCDT) helps power supply designers by simplifying the overall process of determining the digital compensator coefficients and analyzing the control system performance. The DCDT incorporates all feedback gains and delays to provide the most accurate model of the control system. Along with analyzing the closed loop performance via Bode Plots, the user can verify stability by using the DCDT’s root locus and Nyquist plots. Once the desired performance is obtained the DCDT will automatically calculate the compensator coefficients and scaling parameters and generate software files to be used with the free SMPS Control Software Libraries.

The DCDT is topology independent which allows the most sophisticated converters to be analyzed. With a topology independent architecture, the tool requires a mathematical expression of the plant transfer function. This can be entered as a polynomial equation or in pole/zero form (up to 5th order systems). The tool also supports a data import option where the plant transfer function is a table of phase/gain vs. frequency data points that can be generated from a simulation environment or even from a network analyzer.
 
The DCDT currently allows users to develop voltage mode control and peak current mode control applications with support for average current mode control to be available shortly. Depending on the control scheme, different compensators may be required. The DCDT supports many different compensator types such as the digital 3-pole/ 3-zero (3P3Z), digital 2P2Z, digital PID, and analog type II/III. The analog type II/III compensators allow analog designers to input their existing analog compensator designs into the tool either by passive R/C components or by entering pole/zero frequency points. The tool will then generate the equivalent digital compensator streamlining the transition from analog to digital compensator design.

All MPLAB® X IDE. plug-ins, including this Digital Compensator Design Tool, are free, available and ready to install once the MPLAB® X IDE has been installed. Just follow the simple steps in the getting started tab to see all the available plug-ins and to install the DCDT.

High performance power supplies are used in a wide variety of applications ranging from telecommunication equipment, industrial equipment, digital televisions, lighting, air conditioners and other home appliances. They all need solutions for power factor correction to improve overall efficiency, improve the input power factor, voltage regulation and Total Harmonic Distortion (THD) of the input current. Digital interleaved power factor correction methods provide many benefits over older PFC techniques including:

-Lower Cost for High Power Applications
-Smaller PFC Inductor and Magnetic volume
-Higher Power Density
-Lower Ripple
-Easy implementation of sophisticated control algorithms
-Flexible software modifications to meet specific customer needs
-Simpler integration with other applications

This reference design provides an easy method to evaluate the power, and features of SMPS dsPIC® Digital Signal Controllers for an Interleaved Power Factor Correction application. The Interleaved PFC reference design unit works with universal input voltage range, and produces a single high voltage DC output up to 350W of power. The reference design has six main blocks:

-Input EMI filter and rectifier
-Dual Phase Interleaved PFC Circuit with feedback
-Plug in module connector with a dsPIC33FJ16GS504
-User’s interface circuit with programming connector and push buttons
-12V and 3.3V power supply circuit, and
-Fault detection circuit for hardware protection

The dual phase interleaved PFC software implements three compensators for voltage, current and load balancing. It also has a feed-forward compensator based on input average voltage.

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This reference design provides an easy method to evaluate the power, and features of SMPS dsPIC® Digital Signal Controllers for high wattage AC - DC conversion application. Discover the many benefits of digital power control implementation in this reference design. The SMPS AC - DC Reference Design unit works with universal input voltage range, and produces multiple DC outputs. The design is based on a modular structure, which features three major power stages; the input stage, intermediate stage and the third stage, a Point of Load. The input stage is a PFC Boost Converter, the intermediate stage is a Phase-Shifted Zero Voltage Transition (ZVT) Converter, which includes ZVT Full Bridge Converter and Synchronous Rectification, and the third stage is Single-phase and Multi-phase Buck Converters. This reference design uses two dsPIC33F16GS504 devices; one used for the PFC Boost Converter and ZVT Full Bridge Converter, while the other dsPIC® DSC is used for Single-phase and Multi-phase Buck Converters.

This reference designs hardware is not available for purchase but you can request a demonstration. Please contact local sales office in your geography to request a demonstration.
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Refrigerator compressors are now driven by brushless DC motors or permanent magnet synchronous motor to meet high energy efficiency ratings. You must use an inverter-based variable speed drive for the brushless motor to achieve this high energy efficiency. The variable speed drive allows you to operate the compressor at an optimal speed in order to maintain a constant temperature setting as compared to a fixed-speed single-phase AC induction motor (ACIM) drive. Field-Oriented Control (FOC) of brushless motors enables you to implement the variable speed drive and add advanced motor control features like on-the-fly startup and stall detection with auto-recovery.

This refrigerator compressor reference design will help you to rapidly prototype and develop a cost-effective and innovative design using a dsPIC33EP64MC202 Digital Signal Controller. Other Microchip components utilized in the design include  a MCP16331 DC/DC converter and a MIC5239 LDO voltage regulator. The design works with a wide variety of refrigerator compressor motors, supporting both Interior Permanent Magnet Synchronous Motors (IPMSM) and Surface Mount Permanent Magnet Synchronous Motors (SPMSM).This reference design implements sensorless control and single-shunt current sensing technique to save BOM cost. This design also addresses the challenges of reliable startup of the compressor with high pressure and low standby power consumption.

Microchip provides Class-B Safety Software libraries for the dsPIC33 to reduce your development time for appliances requiring functional safety.

Ready for a live demonstration? This reference design is provided with full user’s guide, source code, schematics and PCB layout. Contact Microchip for demonstration, design files and firmware.

Brick DC-DC converters are widely used in data center, telecommunication and automotive applications, converting a nominal 48 V to different output nominal voltages such as 5 V, 9 V or 12 V. The standard dimension of the 1/16th brick converter is 33 x 22.9 mm (1.3 x 0.9 inch). The EPC9143 1/16th brick power module reference design, developed in collaboration with Efficient Power Conversion Corp. EPC, is designed for 48 V to 12 V DC/DC applications. It features the EPC2053 enhancement mode (eGaN®) field effect transistors (FETs), as well as a Microchip dsPIC33CK32MP102 16-bit digital signal controller (DSC). The height limit for this design is set to 10 mm (0.4 inch)

In DC/DC brick power module application, there is a continuous push towards higher power density given a fixed form factor. This reference design supports up to 300 W max. output power with 25 A output current at output voltages of 12 V, peak efficiency of >95%, and maximum power density of 730 W/in3 and demonstrates how dsPIC33C® DSCs are used to fully exploit the high performance of GaN FETs in fast switching Intermediate Bus Converter (IBC) applications.

The reference design firmware includes two modes of operation:

• Conventional Average Current Mode Control (ACMC): Multiloop controller with one outer voltage loop providing the same current reference IREF to two independent inner current loops for each phase, supporting control bandwidths of 2 kHz
• Advanced Type IV Voltage Loop Control (AVMC) with Enforced Cycle-By-Cycle PWM Steering, Gain Modulation and Current Balancing: A single, high-speed type IV voltage mode controller with enforced PWM steering is used to automatically create balanced phase currents in both phases of this interleaved converter. An underlying current balancing scheme compensates component tolerances and deviations over temperature. A built-in adaptive gain control algorithm stabilizes gain variations of the voltage loop controller during input- and output voltage transients, stabilizing cross-over frequency and output impedance, supporting control bandwidths of 25 kHz, for improved transient response, helping to minimize power distribution network (PDN) decoupling capacity

For more information on hardware related documentation, design files and purchasing information, please visit EPC’s product website: https://epc-co.com/epc/Products/DemoBoards/EPC9143.aspx

The EPC9148 demonstration board is an ultra-Thin, three-level DC-DC synchronous buck converter for high performance computing systems with 60V maximum input voltage, 12.5A maximum output current, 19V output voltage, measuring only 3.5 mm component height (5 mm height total including the printed circuit board) achieving a power density of 400 W/in³. It features the high-performance dsPIC33CK Digital Signal Controller (DSC), 40 V EPC2055 and the 100 V EPC2053 and EPC2038 GaN FETs.

This reference design, uses a flying capacitor at the input side to half the input voltage, increasing the dynamic bandwidth of the converter while still using a simple, non-isolated topology. For this purpose, the classical half-bridge drive has been split into an upper and lower half-bridge sections allowing to flip the flying capacitor voltage in every switching cycle. This approach allows the usage of switching devices with lower voltage ratings which have lower on-resistance and are overall faster than their higher voltage-rating counterparts. As a result, the slightly increased losses accumulated during the charge periods of the flying capacitor are compensated by the lower commutation losses of the switch stage ending up at an equal to slightly higher total efficiency. Biasing the buck topology from the flying capacitor directly instead of the input also doubles the inductor ripple frequency and lowers the ripple current peak value. This allows using lower inductance and smaller output capacitance, which further minimizes the size and increases the power density in comparison to a conventional buck converter topology (see EPC9153 for comparison).

This driving scheme works best with low voltage Gallium-Nitride switches due to their high switching speed and very low internal capacitance. The digital control stage is key to apply the delicate switching pattern and runtime balancing of the flying capacitor voltage.

For more information on hardware related documentation, design files and purchasing information, please visit EPC’s product website:
EPC9148 – 48 V Three-level Synchronous Buck Converter

The 300 W Bi-Directional 1/16th Brick Power Module reference design, developed in collaboration with Efficient Power Conversion Corp. (EPC), features the dsPIC33CK32MP102 Digital Signal Controller (DSC) which is ideal for Switched-Mode Power Supply (SMPS) applications as the main controller implementing interleaved, non-isolated synchronous buck converter power module. The power stage features the 12.5 A ePower™ Stage device EPC2152, a monolithic eGaN® FET half bridge power stage with integrated eGaN® FET drivers.

Embedding the driver circuit and the power FETs into the same monolithic die minimizes the common source inductance (CSI) between the high- and low-side FETs as well as the gate drive loop inductance. By matching the drivers to the power FETs results in extreme switching speeds of 48 V / 1 ns and minimum switching losses. The 3.3V compatible input levels allow directly driving the power stage from a dsPIC33 DSC’s pin without requiring additional components with maximum edge placement precision.

For more information on hardware related documentation, design files and purchasing information, please visit EPC’s product website:EPC9151KIT – 300 W Bi-Directional 1/16th Brick Evaluation Module

 

 The 6.5 mm thin EPC9153 power module is a 250W high-efficiency, high-performance synchronous buck converter with 60 V maximum input voltage, 12.5 A maximum output current, and programmable 12-20 V (default set to 20 V) regulated output voltage. Developed in collaboration with Efficient Power Conversion Corporation (EPC), it features the high-performance dsPIC33CK Digital Signal Controller (DSC), EPC2218 and EPC2038 eGaN® FETs.

While other reference designs such as EPC9148 have been optimized for highest power densities, this conventional non-isolated, hard-switching step-down converter is optimized for maximum output power capability at the highest efficiency (> 98.2%) with a maximum temperature rise of +40 K above ambient with passive cooling. With a total power density of only 112 W/in³, this converter is capable of providing up to 200% (500W / 25A max.) of its nominal output power for a limited amount of time at a peak efficiency of >98.2%. For test purposes, the over-power time limits have been set to 10ms for 150% and 1ms for 200% load. Each boost-mode time limit can be reconfigured and tailored to known test conditions by the user. On the other side of the load spectrum, the power consumption under no-load conditions has been minimized by applying a hysteretic standby mode, in which the converter still provides a regulated output voltage at only 280 mW total power consumption, supporting fast recovery of fixed frequency operation within 100 µsec.

The digital control loop in this design enables the non-linear switch-over between control modes across load conditions and self-protecting over-power boost modes, expanding the support of extreme load dynamics of high-performance loads like CPUs and FPGAs. The 250ps resolution fine-edge placement of the PWM module enables efficiency enhancements through dead-time optimization.

For more information on hardware related documentation, design files and purchasing information, please visit EPC’s product website:
EPC9153 – 250 W High Efficiency, Thin Power Module

The LCD Explorer Development Board supports Microchip’s 100-pin Microcontrollers with x8 common Segment LCD Drivers. The LCD Explorer provides an ideal platform for a customer to evaluate a MCU with a x8 Common LCD Driver on a 38 segment x 8 common LCD display. PICtail Plus connections allow a customer to evaluate the selected MCU in a complex system by adding Microchip’s PICtail Plus daughter boards.

With the common use of cards instead of cash, Credit Card Reader (MSR, mag stripe/swipe readers) are an essential part of any POS system. MSRs can read any card with magnetic stripes, including some driver's licenses, gift cards, and other IDs.

Magnetic Card Readers (also known as Magnetic Stripe Readers or MSRs) read data from a 3-track magnetic stripe via a peak detection circuit and process that data for downstream users. After extracting data from the magnetic stripe, it is converted to binary data and formatted for encryption. They feed the swiped information to applications management software and connect through USB, RS-232, or PS/2 connections.

Microchip Magnetic card reader solution reads ISO/IEC-7811 cards (also known as “Frequency/double Frequency” (F2F) encoding standard). The data format encodes 7-bit data on Track1, 5-bit data for Track 2 and 3. Please refer to the features section for an in depth description of the Magnetic card readers capabilities.

Microchip offers 2 solutions, one using the dsPIC33EP family and the other using the PIC24F family of PIC's

This demo is not for sale, but can be easily created from components listed in the user's guide.

For questions related to this board please contact http://www.microchip.com/support

The Three Coil Wireless Power Transmitter is based on the dsPIC33CH128MP506 device and implements a fixed frequency power control topology. The front-end buck-boost control is managed by the dsPIC33CH device. The transmitter includes CAN for ease of integration into the automotive environment. The transmitter also enables the implementation of NFC.

Microchip’s dual-core dsPIC33CH devices integrates the wireless power software stack along with CAN-FD software, Front-end Buck- Boost control, NFC software stack, and Crypto Authentication software. The software is partitioned between the two cores such that the wireless power control is implemented independently on one core and all the remaining functions are implemented in the other core. This partitioning facilitates independent code development on separate modules and enables parallel execution of the Qi protocol and other functions such as NFC

Microchip’s 200W DC/DC LLC Resonant Converter Reference Design operates over a wide input voltage range (350 - 420Vdc) with a nominal input of 400V, providing a 12V DC output, while maintaining high-voltage isolation between the primary and secondary. High efficiency is achieved through Zero Voltage Switching (ZVS) on the half-bridge converter and Zero Current Switching (ZCS) on the synchronous rectifier. A synchronous rectifier is implemented over the traditional full wave rectifier for improved efficiency. The DC/DC LLC Resonant Converter Reference Design utilizes Microchip’s digital power conversion dsPIC for unique “adaptive” control of the half-bridge converter and synchronous rectifier.

This reference design is implemented using a single dsPIC33EP / dsPIC33FJ “GS” digital-power DSCs from Microchip that provides the full digital control of the power conversion and system management functions. As shown in this reference design the efficient use of dsPIC33EP / dsPIC33FJ ‘GS’ devices enable designers to easily and cost effectively create products using advanced switching techniques such as LLC that lower switching losses and enable efficiencies as high as 95%. The DC/DC LLC Resonant Converter Reference Design is royalty free when used in accordance with the licensing agreement.

Both the design packages (EP and FJ) are available to download under documents and software section. 

Microchip’s Digital Pure Sine Wave Uninterruptible Power Supply (UPS) Reference Design is based on the dsPIC33F “GS” series of digital-power Digital Signal Controllers (DSCs). This reference design demonstrates how digital-power techniques when applied to UPS applications enable easy modifications through software, the use of smaller magnetics, intelligent battery charging, higher efficiency, compact designs, reduction in audible and electrical noise via a purer sine-wave output, USB communication and low-cost overall bill-of-materials. This reference design is Royalty Free. Click here for a list of complete documentation and software & hardware design information.

This reference design is implemented using a single dsPIC33F “GS” digital-power DSCs from Microchip that provides the full digital control of the power conversion and system management functions. As shown in this reference design the dsPIC33F ‘GS’ devices enable designers to easily and cost effectively create products using advanced switching techniques such as LLC that lower switching losses and enable efficiencies as high as 95%. The DC to DC LLC Converter Reference Design is royalty free when used in accordance with the licensing agreement.

The Digital Pure Sine Wave UPS System operates in two modes:

Standby Mode – Operational in the presence of AC line voltage; battery is charged in this mode.
UPS Mode – Operational during power outage; the system switches to a function called inverter to provide power to load. Charge stored in the battery is converted to AC output.

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Microchip’s Grid-Connected Solar Microinverter Reference Design demonstrates the flexibility and power of SMPS dsPIC® Digital Signal Controllers in Grid-Connected Solar Microinverter systems. This reference design has a maximum output power of 215 Watts and ensures maximum power point tracking for PV panel voltages between 20V to 45V DC. High efficiency was achieved by implementing a novel interleaved active-clamp flyback topology with Zero Voltage Switching (ZVS).

This reference design is implemented using a single dsPIC33F “GS” digital-power DSCs from Microchip that provides the full digital control of the power conversion as well as all system management functions. As shown in this reference design the dsPIC33F ‘GS’ devices enable designers to easily and cost effectively develop products using advanced switching techniques / topologies that lower switching losses and improve overall system efficiency. The Grid-Connected Solar Microinverter Reference Design is royalty free when used in accordance with the licensing agreement.

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The TDTTP4000W066C 4kW bridgeless totem-pole power factor correction (PFC) evaluation board (developed by Transphorm) achieves very high efficiency single-phase AC-DC conversion. Using GaN FETs in the fast-switching leg of the circuit and low-resistance MOSFETs in the slow-switching leg of the circuit results in improved performance and efficiency.

The development board integrates Microchip's dsPIC33CK Digital Power PIM with Transphorm’s 4 kW AC-to-DC bridgeless totem pole power factor correction (PFC) evaluation board featuring SuperGaN™, the company’s latest Gen IV GaN technology.

The firmware can be downloaded from the software section below.

TDTTP4000W066C_0v1-KIT is for evaluation purposes only and is available from Transphorm.

For more details and users guide, refer to Transphorm website.

Bluetooth® has emerged as a standard of choice for connecting local embedded applications through a smartphone or tablet. Many applications only need simple command and control, or a quick status update from a sensor. By catering to these needs, Bluetooth Low Energy (BLE) has evolved to support these low-duty cycle applications with lower power consumption. Microchip’s eXtreme Low Power PIC® Microcontrollers and RN4020 Bluetooth low energy module help in achieving low power consumption. The PIC24FJ128GB204 or PIC24FJ256GB410 devices used in this demo have an integrated hardware Crypto engine. This demonstration shows the simple communication between the RN4020 module and a Bluetooth Low Energy (BLE) supporting smartphone or tablet. The RN4020 module is controlled by the PIC24FJ128GB204 or PIC24FJ256GB410 MCU which include a hardware crypto engine used for AES encryption in the demonstration. The demo is built using standard development tools from Microchip including the Explorer 16 Board, PIC24FJ128GB204 or PIC24FJ256GB410 Processor Plug-In Module (PIM), and Bluetooth LE PICtail Plus Daughter Card. These readily available tools can be used to easily replicate this demo on your own. The demo is supported by MCU firmware and an app that will run on an Android phone or tablet.  The first application is turning the LEDs on and off using the touch buttons on the tablet.  The app can also show the state of the switches on the board, toggling on and off.  The demo also includes data security using the crypto engine integrated on the PIC24FJ128GB204 or PIC24FJ256GB410 MCU, with up to 128-bit AES.   This demo shows a PIC24 XLP MCU working with Bluetooth LE talking to an Android tablet to show basic command and control similar to what would be used for a simple IoT sensor node. This demo can also be built using the PIC24FJ256GB410 Processor Plug-In Module in place of the PIC24FJ128GB204 Processor Plug-in Module. 

For questions related to this board please contact http://www.microchip.com/support

Microchip’s Platinum-Rated 720W AC-DC Reference Design demonstrates the flexibility and power of SMPS dsPIC® Digital Signal Controllers in switch-mode power supplies. This reference design has a peak efficiency of 94.1% and achieves the ENERGY STAR CSCI Platinum Level. It features a 2-phase interleaved power factor correction boost converter followed by a 2-phase interleaved two-switch forward converter with synchronous rectification. 

This reference design is implemented using two dsPIC33F “GS” digital-power DSCs from Microchip that provide the full digital control of the power conversion as well as all system management functions. As shown in this reference design the dsPIC33F ‘GS’ devices enable designers to easily and cost effectively develop products using advanced adaptive control algorithms that help improve efficiency at light loads. The Platinum-Rated 720W AC/DC Reference Design is royalty free when used in accordance with the licensing agreement.

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The environmental changes of today are no exception. Professional weather stations are rightfully used, but cannot be placed in every corner of the world. What if it was possible to make a low cost weather station, which almost everyone could afford? What if we together could help out with a piece of the puzzle, trying to solve problems ahead?

We have created a portable weather station that will measure and display weather parameters such as 
    •  Temperature 
    •  Humidity 
    •  Environment Air Quality 
    •  Light Brightness
and can be used in office environment and outdoor as well. The design uses Microchip eXtreme Low Power MCU PIC24FJ128GC010 which drives the measurement for all of the sensors. The sensor values undergo signal conditioning using microcontrollers integrated Op-Amps and analog to digital converters making the sensor reading suitable for digital processing. To allow user to control the board and select different operating modes capacitive buttons are implemented using CTMU peripheral. A segmented LCD display and USB are both output for the board. The board is powered by two AA batteries and also a coin cell connected to Vbat pin of the microcontroller for maintaining real time clock information even if the main battery is removed.
 
Besides displaying weather data on board, we can do meaningful use of data by sending data to cloud using computers. This demo also includes connectivity to computers using USB communications device class (or USB CDC), providing an interface for transmitting and receiving to other USB based systems. The demo is supported by Schematic, User guide and MCU firmware.

This level of integration is available on Microchip’s PIC24F ‘GC’ family, we call it intelligent analog and it improves system throughput, reduces noise, and reduces system cost by integrating several analog blocks. We also integrated user interface peripherals like USB, LCD to create a product that is perfect for portable medical and industrial sensors applications.

For questions related to this board please contact http://www.microchip.com/support

This reference design provides an easy method to evaluate the power, and features of SMPS dsPIC® Digital Signal Controllers in high density quarter brick DC-DC converters for intermediate bus architectures(IBA). This reference design is implemented using a single dsPIC33F “GS” digital-power DSCs from Microchip that provides the full digital control of the power conversion and system management functions. As shown in this reference design the dsPIC33F ‘GS’ devices enable designers to easily and cost effectively create products using advanced switching techniques such as Phase Shift Full Bridge (PSFB) topology that lower switching losses and enable efficiencies as high as 94%. The reference design also supports the Full Bridge topology through minor hardware modifications. The Quarter brick DC to DC Converter Reference Design is royalty free when used in accordance with the licensing agreement.

This reference design works with telecom input range 36V – 76V DC and provides 12V with 200W power. Designed with planar magnetics, this reference design implements various non-linear techniques, which improves the performance and efficiency.

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This reference designs hardware is not currently available for purchase. You can request a demonstration. Please contact local sales office in your geography to request a demonstration.
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