BQ2530XEVM is configured by default to operate with TS in normal range. If external
thermistor is available, connect external thermistor at J1(2)-EXT_TS and J1(1)-PGND, and
remove R14.
The leads and cables to the various power
supplies, batteries and loads have resistance. The
current meters also have series resistance. The
charger dynamically reduces charge current
depending on the voltage sensed at its VBUS pin
(using the VINDPM feature), BAT pin (as part of
normal termination), and TS pin (through its
battery temperature monitoring feature via battery
thermistor). Therefore, voltmeters must be used to
measure the voltage as close to the IC pins as
possible instead of relying on the digital
readouts of the power supply.
When using a source meter that can source and
sink current as your battery simulator, TI highly
recommends adding a large (1000+ μF) capacitor at
the EVM BATTERY and GND connectors in order to
simulate a real battery. Configuring the source
meter for 4-wire sensing eliminates the need for a
separate voltmeter to measure the voltage at the
BAT pin. When using
4-wire sensing, always ensure that the sensing
leads are connected in order to prevent accidental
overvoltage by the power leads.