TI Launches Switching Battery Charger IC Suitable for Compact Devices
Published2019.09.05 08:02| Suitable for Compact Medical and Personal Electronic Device Design
| Useful for Standby Mode Systems
Design of compact battery-powered devices is expected to become easier.
Texas Instruments (TI) announced on the 3rd that it is launching a switching battery charger IC supporting a termination current of 20mA.
(Image courtesy of TI)
By using TI's BQ25619 charger IC, designers can efficiently design compact medical and personal electronic device applications such as hearing aids, earbuds, wireless charging cases, IP network cameras, patient monitoring devices, and personal care applications.
With its low termination current of 20mA, the BQ25619 increases battery capacity and usage time by 7%. Additionally, by using a configurable top-off timer, usage time can be extended further, providing the advantage that users need to charge their devices relatively less frequently.
By reducing battery leakage to 6mA at shipment, the BQ25619 conserves battery energy and doubles the device's shelf life. Additionally, when operating on battery alone it consumes only 10mA, making it useful for systems that spend much time in standby mode.
The BQ25619 integrates charging, boost converter, and voltage protection functions, enabling effective design of space-constrained applications. It also does not require the external inductor that was needed by previous-generation charger ICs. Bidirectional buck or boost topology is possible, requiring only a single power element for charging and discharging.
TI provides the BQ25619 for wireless charging cases and the BQ25150 for earbud charging. The BQ25150 is a linear charger controllable via I2C.
Earbuds require two batteries and low charging current in space-constrained environments. This differs from the design requirements of wireless charging cases. Therefore, a single battery is insufficient and a multi-battery system is required.
The BQ25150 features two LDO linear regulators, an analog-to-digital converter, quiescent current below 500nA in low-power mode, and a maximum charging current of 500mA, enabling a compact solution size of 11mm2.
To enable designers to easily evaluate the functionality and performance of the BQ25619 and shorten development time, TI provides the BQ25619 evaluation module. The BQ25619EVM is available for USD 99.
The BQ25619 is currently supplied through TI store and official distribution channels. It is offered in a 24-pin WQFN package, with a price of USD 1.45 per unit based on a quantity of 1,000 units.
The 30-pin BQ25618, which adopts a smaller WCSP package with identical functionality, is scheduled for launch in the third quarter of 2019.
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