The bq24901 is a single-cell Li-Ion charge management device designed specifically for off-line charger applications. It provides current or voltage regulation feedback, temperature monitoring, charge status, and adjustable charge termination, in a single monolithic device.
The bq24901 is a single‑cell Li‑ion and Li‑polymer charge‑management IC designed for offline charger applications such as cradle chargers for digital cameras, desktop chargers, and handheld devices. It resides on the secondary side of the transformer and supplies control feedback to primary‑side controllers, offering current or voltage regulation, temperature monitoring, charge status outputs, and adjustable charge termination.
The document includes detailed electrical characteristics, recommended operating conditions, mechanical data for the 14‑pin TSSOP package, functional block diagrams, terminal descriptions, and application information to aid designers in implementing the device in their products.
| Supply voltage (Voc) range | 3 V – 10 V |
|---|---|
| Operating temperature range | -40 °C – 100 °C |
| Package type | 14‑Pin TSSOP (PW) |
| Voltage regulation accuracy | ±30 mV |
| Charge termination method | Minimum current set via TADJ pin |
The device operates with a supply voltage (Voc) between 3 V and 10 V.
It is available in a 14‑pin TSSOP (PW) package.
Charge termination is detected by monitoring the minimum current set through the TADJ pin.
Typical applications include cradle chargers for digital cameras, desktop chargers, and handheld devices.