Test and Measurement Summary
Figure 10. Charging a Super Cap on VBAT_SEC
Tips for other Tests and Measurements
The quiescent current during main boost operation, which is basically the current from the battery to the
IC, is measured at the VSTOR pin. If a source-meter is not available to make the measurement, connect a
100-k
Ω
resistor to VSTOR and connect a 3-V supply from the other end of this resistor to the ground of
the EVM. A 10-M
Ω
meter can be used to measure the voltage drop across the resistor and calculate the
current. No other connections should be made to the EVM and the measurement should be taken after
steady state conditions are reached (may take a few minutes). The reading should be much less than 100
nA.
13
SLUUAA8 – September 2013
User's Guide for bq25505 Battery Charger Evaluation Module for Energy
Harvesting
Copyright © 2013, Texas Instruments Incorporated
