1
DEMO MANUAL DC2973A
Rev. 0
DESCRIPTION
LTC3337
Primary Battery SOH Monitor with
Precision Coulomb Counter
Demonstration circuit 2973A shows the
LTC
®
3337
Primary Battery State of Health (SOH) monitor with pre-
cision coulomb counter operating with a configurable
peak current limit. The LTC3337 supports input voltages
from 1.8V to 5.5V and a peak current up to 100mA with a
quiescent current of 100nA. Coulomb count, battery volt-
age, and Battery Series Resistance (BSR) are measurable
and can be used to quantify the charge state and health
of a battery.
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PERFORMANCE SUMMARY
BOARD PHOTO
The DC2973A demonstrates a simple layout for the high-
est-power configuration of the LTC3337. The circuit can
be reduced for lower I
PEAK
levels. The demo board can
be connected directly to a PC using a micro USB cable in
order to run a GUI and configure simple a Battery State of
Charge (SOC) monitor. Source code for the GUI is avail-
able and can be used as a starting point for LTC3337
firmware development.
Design files for this circuit board are available
.
Specifications are at T
A
= 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Input Voltage Range
1.8
5.5
V
I
OUT
Output Current
IPK2 – IPK0 = 111
100
mA
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