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Medical MEMS Micro Pump Demonstration

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

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.

Our medical MEMS Micro Pump Demonstration Board shows a unique implementation for cost-effective drug delivery devices. Our integrated Core Independent Peripherals (CIPs) on the PIC16F1719 8-bit microcontroller (MCU) significantly offload the MCUs 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.

Our MCUs with CIPs are designed to handle tasks independently with no code or supervision from the MCUs core during operation. Using CIPs 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 our HV9150 step-up DC/DC controller and the HV513 high-voltage push-pull driver IC. 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.

Design Files Downloads

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

This reference design helps you 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.

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System Diagram

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Demonstration 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

Product Features

PIC16F1719 MCU

  • 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 Analog-to-Digital Converter (ADC)
  • 8-bit and 5-bit ADCs
  • Integrated operational amplifiers
  • Peripheral Pin Select (PPS)
  • Several packages available including a small ultra-thin QFN (UQFN) package

HV9150 Step-Up DC/DC Controller

  • 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

Additional Resources

  • 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 with 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 1 Kb of memory
  • MCP9700 low-power linear active thermistor IC
  • Contact your local sales representative to see a working demonstration of our Medical MEMS Micro Pump Demonstration Board