Medical Design Briefs - November 2024 - 16

How to Design
Reliable, Low-Power Wearable
Medicine Injectors
A
dvances in IoT and electronic
technology are enabling
more personalized, continuous
medical care. People
with medical conditions that
require a high degree of monitoring and
continuous medication infusion can now
take advantage of wearable medicine injection
devices to treat their problems.
Wireless communication allows medical
personnel to monitor and adjust the
amount and flow rate of an individual's
medication. The small size of the injectors
enables the individual to be active
and not be burdened or limited by a
line-powered instrument (see Figure 1).
Designers must develop a product
that operates reliably 24 hours a day, seven
days a week. The product must also
be as efficient as possible to maximize
battery run time between charges. With
space and weight at a premium, designers
must minimize the number and size
of components while incorporating all
the essential functionality and ensuring
robust operation.
This article provides designers with
recommendations
for circuit
protection
against electrical hazards such as
overcurrent and electrostatic discharge
(ESD). It will also introduce designers to
some unique sensing and detection components
that enable low-power circuit
design. These components will allow designers
to achieve robust, reliable performance
in a small, lightweight, low-power
product.
Description of a Wearable
Medicine Injector
Figure 2 illustrates a wearable medicine
injector. Surrounding the injector
are blocks indicating the components
that provide protection and efficient
control for the medicine injector's circuitry.
Figure 3 presents a block diagram
of a wearable medicine injector. The
table on the right of the block diagram
lists protection and control components
recommended for use in specific circuit
blocks.
A long-life lithium-ion (Li-ion) battery
powers the medicine injector. A
USB source provides power to charge
the battery.
Depending on the power
requirements of the injector, recharging
the battery will require either a USB-A
interface, a USB-B interface, or a USB-C
interface. The USB-A and -B interfaces
can provide up to 20 W of charging power,
while the USB-C interface can deliver
up to 100 W.
The
microcontroller unit (MCU)
drives the injector motor and obtains
position feedback from activity detection
and position sensors. The injector transPeople
with medical
conditions that require a
high degree of monitoring
and continuous medication
infusion can now take
advantage of wearable
medicine injection devices
to treat their problems.
16
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Medical Design Briefs, November 2024
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Medical Design Briefs - November 2024

Table of Contents for the Digital Edition of Medical Design Briefs - November 2024

Medical Design Briefs - November 2024 - Intro
Medical Design Briefs - November 2024 - Sponsor
Medical Design Briefs - November 2024 - COV1a
Medical Design Briefs - November 2024 - COV1b
Medical Design Briefs - November 2024 - COV1
Medical Design Briefs - November 2024 - COV2
Medical Design Briefs - November 2024 - 1
Medical Design Briefs - November 2024 - 2
Medical Design Briefs - November 2024 - 3
Medical Design Briefs - November 2024 - 4
Medical Design Briefs - November 2024 - 5
Medical Design Briefs - November 2024 - 6
Medical Design Briefs - November 2024 - 7
Medical Design Briefs - November 2024 - 8
Medical Design Briefs - November 2024 - 9
Medical Design Briefs - November 2024 - 10
Medical Design Briefs - November 2024 - 11
Medical Design Briefs - November 2024 - 12
Medical Design Briefs - November 2024 - 13
Medical Design Briefs - November 2024 - 14
Medical Design Briefs - November 2024 - 15
Medical Design Briefs - November 2024 - 16
Medical Design Briefs - November 2024 - 17
Medical Design Briefs - November 2024 - 18
Medical Design Briefs - November 2024 - 19
Medical Design Briefs - November 2024 - 20
Medical Design Briefs - November 2024 - 21
Medical Design Briefs - November 2024 - 22
Medical Design Briefs - November 2024 - 23
Medical Design Briefs - November 2024 - 24
Medical Design Briefs - November 2024 - 25
Medical Design Briefs - November 2024 - 26
Medical Design Briefs - November 2024 - 27
Medical Design Briefs - November 2024 - 28
Medical Design Briefs - November 2024 - 29
Medical Design Briefs - November 2024 - 30
Medical Design Briefs - November 2024 - 31
Medical Design Briefs - November 2024 - 32
Medical Design Briefs - November 2024 - 33
Medical Design Briefs - November 2024 - 34
Medical Design Briefs - November 2024 - 35
Medical Design Briefs - November 2024 - 36
Medical Design Briefs - November 2024 - 37
Medical Design Briefs - November 2024 - 38
Medical Design Briefs - November 2024 - 39
Medical Design Briefs - November 2024 - 40
Medical Design Briefs - November 2024 - 41
Medical Design Briefs - November 2024 - 42
Medical Design Briefs - November 2024 - 43
Medical Design Briefs - November 2024 - 44
Medical Design Briefs - November 2024 - 45
Medical Design Briefs - November 2024 - 46
Medical Design Briefs - November 2024 - 47
Medical Design Briefs - November 2024 - 48
Medical Design Briefs - November 2024 - 49
Medical Design Briefs - November 2024 - 50
Medical Design Briefs - November 2024 - COV3
Medical Design Briefs - November 2024 - COV4
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https://www.nxtbook.com/smg/techbriefs/24MDB12
https://www.nxtbook.com/smg/techbriefs/24MDB11
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https://www.nxtbook.com/smg/techbriefs/23MDB07
https://www.nxtbook.com/smg/techbriefs/23MDB06
https://www.nxtbook.com/smg/techbriefs/23MDB05
https://www.nxtbook.com/smg/techbriefs/23MDB04
https://www.nxtbook.com/smg/techbriefs/23MDB03
https://www.nxtbook.com/smg/techbriefs/23MDB02
https://www.nxtbook.com/smg/techbriefs/23MDB01
https://www.nxtbook.com/smg/techbriefs/techleaders22
https://www.nxtbook.com/smg/techbriefs/22MDB12
https://www.nxtbook.com/smg/techbriefs/22MDB11
https://www.nxtbook.com/smg/techbriefs/22MDB10
https://www.nxtbook.com/smg/techbriefs/22MDB09
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https://www.nxtbook.com/smg/techbriefs/22MDB07
https://www.nxtbook.com/smg/techbriefs/22MDB06
https://www.nxtbook.com/smg/techbriefs/22MDB04
https://www.nxtbook.com/smg/techbriefs/techleaders21
https://www.nxtbook.com/smg/techbriefs/22MDB03
https://www.nxtbook.com/smg/techbriefs/22MDB02
https://www.nxtbook.com/smg/techbriefs/22MDB01
https://www.nxtbook.com/smg/techbriefs/21MDB12
https://www.nxtbook.com/smg/techbriefs/21MDB11
https://www.nxtbook.com/smg/techbriefs/21MDB10
https://www.nxtbook.com/smg/techbriefs/21MDB09
https://www.nxtbook.com/smg/techbriefs/21MDB08
https://www.nxtbook.com/smg/techbriefs/21MDB07
https://www.nxtbook.com/smg/techbriefs/21MDB06
https://www.nxtbook.com/smg/techbriefs/21MDB05
https://www.nxtbook.com/smg/techbriefs/21MDB04
https://www.nxtbook.com/smg/techbriefs/21MDB02
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