POWERGATE LLC 866-588-1750 www.powergatellc.com
Power Sources Unlimited 800-966-7784 www.psui.com/traco
Fully regulated 1 Watt
• Wide 2:1 input voltage ranges cover 4. 5 to 75 VDC
• Cost optimised design
• No minimum load required
• Continuous short circuit protection
• Temperature range -40°C to +85°C
• I/O isolation 1500 VDC
• Remote On/Off control
TMR 1 Series
Compact SIP- 6 and
efficiency compared to linear regulators.
However, because of cost and area penalties,
it is not possible to use a dedicated induc-tor-based switching regulator for each rail.
Options like multirail DC/DC converters
with inductor-sharing need to be explored.
Switched-capacitor DC/DC converters with
fully integrated capacitors should be considered as alternatives to linear regulators to
improve efficiency and battery life.
Healthtech wearable electronics
The other class of wearable devices more
applicable to the medical industry includes
patches and fitness straps worn to monitor
and report vital bodily signals. For aesthetic
and convenience reasons, these patches need
to be extremely thin, which limits onboard
energy storage capacity. In these devices, the
patch periodically monitors the vital signs
and radios these stats to a central hub.
Since the device needs to sense and
Even while the average power available
transmit information every few seconds,
aggressive duty cycling is employed within
these systems. This brings down the overall
power consumed to less than 100 µ W, thereby
achieving longer battery life time with smaller
batteries. Battery lifetime can be further
improved, or in some cases extended indefi-
nitely, by using energy harvesting.
Consider the earlier example of embedding
a 2 cm2 solar cell on the device. In this case,
even when used indoors, the harvested power
of a few tens of µW is significant enough to
have a major impact on the battery life. Wear-
ing the device outdoors brings a 50-hour im-
provement in battery life for every one hour
the device is exposed to bright sunlight.
from the harvester may be higher than the
average device power, it may not be viable to
Even while the average power
available from the harvester may
be higher than the average de-
vice power, it may not be viable to
completely replace the battery in