I have a customer that has been using the TPS61016, which has an abs max 3.6V input voltage rating. They use two alkaline batteries.
They want to be able to tell their customers that they can use Lithium Iron Disulfide cells for longer battery life - actually they have already told their customers this.
These are new to me. The marketing blurb for the battery (http://data.energizer.com/PDFs/lithiuml91l92_appman.pdf ) says this:
Although the higher OCV of the LiFeS2 system is 1.8 volts, the nominal or rated voltage is 1.5 volts which
makes it a suitable replacement for alkaline and nickel systems. The battery voltage will drop when it is placed
under load. For this reason, the higher OCV will typically not damage electronic components, but device
designers should take into consideration that the OCV of fresh batteries can range from 1.79 to 1.83V. LiFeS2
batteries fully meet the ANSI specification for a 1.5V battery. When a drain has been applied to the battery,
the OCV drops dramatically and then slowly recovers with time. The OCV for a battery can be misleading. A
“good” battery will generally have an OCV >1.74 volts. Any battery with an OCV <1.70 (after it has been
allowed to recover) is completely discharged. Although an alkaline battery may read “good” at 1.6 volts, this
reading on a LiFeS2 battery indicates the product has been discharged.
Does anyone have experience with these? How much load does it take for the voltage to drop?
Thank you -
