bq2409x is a 1A single-input, single cell Li-ion battery charger that supports USB 100mA and 500mA maximum input current limit and programmable termination and precharge threshold
The bq2409x series are highly integrated, single‑input, single‑cell Li‑ion linear chargers designed for space‑limited portable applications such as smart phones, PDAs, MP3 players, and other low‑power handheld devices. They operate from a USB port or AC adapter and include charge‑voltage and charge‑current accuracy, selectable USB input current limits, programmable termination, and multiple protection features.
The document provides detailed electrical characteristics, recommended operating conditions, pin functions, typical application circuits, and land‑pattern guidelines for the 10‑pin MSOP package. It also lists ordering information, absolute maximum ratings, and safety notices for designers.
| Input voltage range | 3.5 V – 7 V |
|---|---|
| Input current (IN pin) | 1.0 A |
| Continuous output current | 1.25 A |
| Maximum input current limit (USB selectable) | 100 mA or 500 mA |
| Over‑voltage protection | 6.6 V |
| Safety timer | Fixed 10 hour safety timer |
| Thermal shutdown temperature | 155 °C |
| Package | 10‑pin MSOP, 5 mm × 3 mm |
The charger operates with an input voltage from 3.5 V up to 7 V.
The device is supplied in a 10‑pin MSOP package.
The charger can be configured for either 100 mA or 500 mA USB input current.