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Medical MEMS Micro Pump Demonstration Board

PIC16F1719 MCU with Core Independent Peripherals, HV9150 Step-Up DC/DC Controller and the HV513 High-Voltage Push-Pull Driver

Design Files Download

Medical MEMS micro pump demo application note, schematics (in the application note) and ‘C’ source code

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This demo is not for sale. Please download the design files for your evaluation and prototype development.

Summary

MEMS piezoelectric micro pumps offer an attractive alternative to standard pumps that have traditionally been used in precision controlled drug delivery devices. MEMS piezoelectric micro pumps offer the benefits of being small, lightweight, low power, low cost and accurate. Micro pumps are now being used for applications such as transdermal insulin delivery, antithrombogenic blood transportation, injection of glucose for diabetes patients, administration of neurotransmitters to neurons and for chemical/biological sensing.

Microchip’s Medical MEMS Micro Pump Demonstration Board shows a unique implementation for cost-effective drug delivery devices. The integrated Core Independent Peripherals (CIP) on Microchip’s PIC16F1719 8-bit MCU significantly offload the MCU’s core in handling the control functions of a piezoelectric micro pump-based drug delivery device. These functions include providing power and the adjustable voltage and frequency control signals to the high-voltage driver functions.

Microchip’s MCUs with CIP are designed to handle tasks independently with no code or supervision from the MCU’s core during operation. Using CIP can shorten the development time of complex control systems, reduce the design’s component count, board size and power consumption, as well as give you the flexibility to innovate.

The high-voltage driver functions are handled by Microchip’s HV9150 Step-Up DC/DC Controller and the HV513 High-Voltage Push-Pull Driver ICs. The HV9150 converts the battery’s low supply voltage to a 250V high supply voltage. The HV513 driver IC provides high-voltage unipolar push-pull output to actuate the piezoelectric micro pump.

Medical MEMS Micro Pump Demonstration Board Highlights
  • Unique and effective implementation of a MEMS piezoelectric micro pump driver function
  • Cost-effective method for automated drug delivery devices
  • Flow-controlled micro pump can transfer liquid or gas with high accuracy and reliability
  • OLED panel to display system information
  • Easy adjustment of voltage and frequency for flow rate
  • Powered by one 3.7V Li-Polymer rechargeable battery

System Diagram

PIC16F1719 MCU Features
  • eXtreme Low Power (XLP) technology
  • Numerically Controlled Oscillator (NCO), Configurable Logic Cell (CLC), Complementary Output Generator (COG) and Zero Cross Detect (ZCD), Core Independent Peripherals
  • Integrated capacitive touch sensing
  • 28-channel 10-bit ADC
  • 8-bit and 5-bit ADCs
  • Integrated Operational Amplifiers
  • Peripheral Pin Select
  • Several packages available including a small ultra-thin QFN (UQFN) package
HV9150 Step-Up DC/DC Controller Features
  • Wide output voltage range: 6V to 500V
  • Low input voltage: 2.7V
  • 5W maximum output power with external MOSFET driver
  • Built-in charge pump converter for the gate driver
  • Programmable switching frequency from 40 to 400 kHz
  • Four programmable duty cycles from 50% to 87.5%
  • FB return ground switch for power savings applications 
  • Built-in delay timer for internal protection
HV513 High-Voltage Push-Pull Driver
  • Operating output voltage of 250V
  • Low-power level shifting from 5.0 to 250V
  • Shift register speed 8.0 MHz @ Vdd = 5.0V
  • Eight latch data outputs
  • Output polarity and blanking
  • Output short circuit detect
  • Output high-Z control
  • CMOS compatible inputs

Related Product Pages

  • PIC16F1719 Cost-Effective 8-Bit Intelligent Analog Flash Microcontroller
  • HV9150 High Voltage Output Hysteretic Mode Step Up DC/DC Controller
  • HV513 HVCMOS, 8-Channel S-P Converter, w/Push-Pull Outputs, 250V
  • MCP1711 150 mA Ultra-Low Quiescent Current, Capacitorless LDO Regulator
  • MCP1252 Low Noise, Positive-Regulated Charge Pump
  • MCP73834 Stand-Alone Linear Li-Ion/Li-Polymer Charge Management Controller
  • 11AA010 1.8V UNI/O® Serial EEPROM with 1Kb of memory
  • MCP9700 Low-Power Linear Active Thermistor ICs

Contact your local sales representative to see a working demonstration of Microchip's Medical MEMS Micro Pump Demonstration Board.

Development Made Easy

Start with the free download of the schematics and 'C' source code that can easily be modified to your specific application needs.
To download see the Resources section above.

This reference design helps to develop low-cost MEMS piezoelectric micro pump driver functionality.*

*Microchip medical reference designs and demos are intended for evaluation and development purposes only. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use.