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Overview
| Topology | Boost Converter |
| Input voltage | 3.7 V |
| Switching frequency | 40-400 kHz |
| Output 1 | 250 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
- MEMS
- Portable Electronic Equipment
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Power Inductor, 6.8 µH, 2.35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance6.8 µH | Performance Rated Current2.35 A | Saturation Current @ 10%2.4 A | Saturation Current @ 30%4.75 A | DC Resistance172 mΩ | Self Resonant Frequency29 MHz | MountSMT |