TY - GEN
T1 - Low power battery supervisory circuit with adaptive battery health monitor
AU - Lee, Inhee
AU - Lee, Yoonmyung
AU - Sylvester, Dennis
AU - Blaauw, David
PY - 2014
Y1 - 2014
N2 - We propose a battery supervisory circuit (BSC) for wireless sensor nodes that automatically adapts to varying battery health, as reflected by its internal resistance (RBAT), and establishes a constant effective threshold voltage. Compared to a conventional fixed-threshold BSC, the new design avoids oscillation and widens the usable range of battery voltages, independent of RBAT. RBAT is measured by inducing a test current using decaps and measuring the resulting battery RC response time. When tested with a 2μAh battery and 11μA sensor system, the BSC reduces the required hysteresis from 656mV to 77mV, increasing the usable battery voltage range by 2.7×.
AB - We propose a battery supervisory circuit (BSC) for wireless sensor nodes that automatically adapts to varying battery health, as reflected by its internal resistance (RBAT), and establishes a constant effective threshold voltage. Compared to a conventional fixed-threshold BSC, the new design avoids oscillation and widens the usable range of battery voltages, independent of RBAT. RBAT is measured by inducing a test current using decaps and measuring the resulting battery RC response time. When tested with a 2μAh battery and 11μA sensor system, the BSC reduces the required hysteresis from 656mV to 77mV, increasing the usable battery voltage range by 2.7×.
UR - https://www.scopus.com/pages/publications/84905662184
U2 - 10.1109/VLSIC.2014.6858363
DO - 10.1109/VLSIC.2014.6858363
M3 - Conference contribution
AN - SCOPUS:84905662184
SN - 9781479933273
T3 - IEEE Symposium on VLSI Circuits, Digest of Technical Papers
BT - 2014 Symposium on VLSI Circuits, VLSIC 2014 - Digest of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th IEEE Symposium on VLSI Circuits, VLSIC 2014
Y2 - 10 June 2014 through 13 June 2014
ER -