©TTP Ventus 2022 company confidential 4 Rev:
3 INTRODUCTION
3.1 Disc Pump
TTP’s Disc Pump is a multi-award-winning technology which makes use of advances in the field of
non-linear acoustics to offer the following unique features:
silent operation
ultra-smooth flow
millisecond responsiveness
compact form factor
high-precision controllability
In contrast to conventional air pumping mechanisms (such as diaphragm and piston pumps), Disc
Pump does not rely on the bulk compression of air within a cavity. Instead, Disc Pump generates a
high amplitude, high frequency acoustic standing wave within a specially designed acoustic cavity.
The operating frequency varies part-to-part and with pump operating conditions (e.g. temperature,
pressure, etc). A dedicated drive circuit is therefore required to identify and track this frequency over
time.
The schematic: the out-of-plane motion of the
actuator drives in-plane (radial) motion of the gas
in the cavity and creates a standing pressure wave,
resulting in the oscillating cavity pressure shown.
The motion of the actuator is highly exaggerated:
there is virtually no net volume change of the cavity
during operation and at any given point in time
there exists both a region of compression and a
region of rarefaction within the cavity.
Rectification of the alternating cavity pressure is
the key to delivering useful pump performance and
device lifetime. TTP Ventus has addressed this
need by developing a family of innovative valve
designs based on lightweight polymer valve flaps.
Disc Pump technology is protected by a portfolio of
both patent applications and granted patents.
Figure 1: Disc Pump schematic
3.2 The General Purpose Disc Pump Drive PCB
Following initial testing with the Disc Pump
Evaluation Kit, customers may elect to use the
General Purpose Disc Pump Drive PCB in their
own product design. This allows customers to
forgo the time and effort required to design and
integrate their own Disc Pump drive circuit and
firmware. The General Purpose Drive PCB
handles the specific pump drive requirements
and provides a variety of easy-to-use
interfaces, which enable simple integration with
test systems, prototype devices, and final
products.
Figure 2: The General Purpose Drive PCB
