The CN3305 is a PFM‑boost multi‑cell battery charge controller IC that operates from 2.7 V to 6.5 V, supports up to 35 W output and 1 MHz switching…
The CN3305 integrates a reference voltage source, inductor‑current detector, control circuitry and external MOSFET drivers to provide a compact, low‑component‑count solution for charging lithium‑ion, LiFePO₄ and lead‑acid cells. It operates in constant‑current mode followed by a quasi‑CV mode, with automatic re‑charge and over‑voltage protection.
Typical applications include multi‑cell battery chargers for small appliances, POS terminals, audio equipment and stand‑alone chargers. The device is supplied in a 8‑pin SOP‑8 package and complies with RoHS requirements. This manual is written in Chinese.
| Input voltage range | 2.7 V – 6.5 V |
|---|---|
| Maximum switching frequency | 1 MHz |
| Operating temperature range | ‑40 °C to 85 °C |
| Package | SOP‑8 (8‑pin) |
The CN3305 operates with an input voltage from 2.7 V to 6.5 V.