Compact fuel gauging and charging control for single-cell Li-Ion battery packs

04-02-2015 | Texas Instruments | Power

Ideal for space-constrained applications, the Texas Instruments (TI)
bq27532-G1 system-side microcontroller peripheral management unit that
provides Impedance track fuel gauging and charging control for single-cell
Li-Ion battery packs.

The fuel gauge requires little system microcontroller firmware development.
Together with the company's bq2425x single-cell switch-mode charger, the
fuel gauge manages an embedded battery (non-removable) or a removable
battery pack.

The fuel gauge uses the patented Impedance Track algorithm for fuel gauging,
and provides information such as remaining battery capacity (mAh),
state-of-charge (%), runtime to empty (minimum), battery voltage (mV),
temperature (C), and SoH (%).

Battery fuel gauging with the device requires only PACK+ (P+), PACK– (P–),
and thermistor (T) connections to a removable battery pack or embedded
battery circuit. The 15-pin NanoFree (CSP) package has dimensions of 2.61mm
× 1.96mm with 0.5mm lead pitch.

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