IC manufacturers Microchip

IC manufacturers (95)

Microchip HV9150

Piezoelectric Micropump Driver Reference Design

Overview

TopologyBoost Converter
Input voltage3.7 V
Switching frequency40-400 kHz
Output 1250 V / 0.01 A

Description

In medical devices for precision controlled drugdelivery, such as infusion pumps, insulin pumps or nebulizers, piezoelectric micropumps offer anattractive alternative to standard pumps. Piezoelectric micropumps are small, lightweight, low power, low cost, and accurate. This application note describes the implementation of a basic driver circuit for driving a piezoelectricmicropump with flow control in an example of fluid delivery. The described system includes a control board, a high voltage driver board, and an mp6 Piezoelectric Diaphragm Micropump.

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 40kHz to 400kHz
  • Four programmable duty cycles from 50% to 87.5%
  • FB return ground switch for power savings applications
  • Built-in delay timer for internal protection
  • Non-isolated DC/DC converter
  • Processed with HVCMOS® technology

Typical applications

  • Printers
  • Portable Electronic Equipment
  • MEMS

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74437324068SPEC
8 files WE-LHMI SMT Power Inductor 6.8 2.35 2.4 4.75 172 29 SMT
Order Code Data­sheet Simu­lation
74437324068SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples