Packaging information
| Package | Pins WQFN (RTW) | 24 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the BQ25619
- Single chip solution to charge wearable accessories from adapter or battery
- High-efficiency, 1.5MHz,
synchronous switch-mode buck charger
- 95.5% charge efficiency at 0.5A and 94.5% efficiency at 1A
- ±0.5% charge voltage regulation (10mV step)
- I2C programmable JEITA profile of charge voltage, current and temperature thresholds
- Low termination current with high accuracy 20mA±10mA
- Small inductor form factor of 2.5 x 2.0 x 1.0mm3
- Boost mode with output from 4.6V
to 5.15V
- 94% boost efficiency at 1A output
- Integrated control to switch between Charge and Boost mode
- PMID_GOOD pin control external PMOS FET for protection against fault conditions
- Single input supporting USB
input, high-voltage adapter, or wireless power
- Support 4V to 13.5V input voltage range with 22V absolute max input rating
- Programmable input current limit (IINDPM) with I2C (100mA to 3.2A, 100mA/step)
- Maximum power tracking by input voltage limit (VINDPM) up to 5.4V
- VINDPM threshold automatically tracks battery voltage
- Narrow VDC (NVDC) power path
management
- System instant-on with no battery or deeply discharged battery
- Flexible I2C configuration and autonomous charging for optimal system performance
- High integration includes all MOSFETs, current sensing and loop compensation
- Low RDSON 19.5mΩ
BATFET to minimize charging loss and extend battery run time
- BATFET control for Ship mode, and full system reset with and without adapter
- 7µA low battery leakage current in Ship mode
- 9.5µA low battery leakage current with system standby
- High accuracy battery charging
profile
- ±6% charge current regulation
- ±7.5% input current regulation
- Remote battery sensing to charge faster
- Programmable top-off timer for full battery charging
- Safety Related
Certifications:
- IEC 62368-1 CB Certification
Description for the BQ25619
The BQ25618/619 integrates charge, boost converter and voltage protection in a single device. It offers the industry’s lowest termination current for switching chargers to charge wearable devices by full battery capacity. The BQ25618/619 best-in-class low quiescent current reduces battery leakage down to 6uA in Ship mode, which conserves battery energy to double the shelf life for the device. The BQ25619 is in a 4mm × 4mm QFN package for easy layout. The BQ25618 is in a 2.0mm × 2.4mm WCSP package for space limited design.