CN3302 2.75V to 6.5V PFM Boost Dual-Cell Lithium Battery Charging Control IC SOP-8 (2S Li-Ion Li-Polymer Charger Controller IC)

The CN3302 is a high-efficiency PFM boost-mode battery charging controller IC designed for charging 2-cell (2S) Lithium-Ion and Lithium-Polymer battery packs from low-voltage power sources such as USB. Operating over an input voltage range of 2.75V to 6.5V, the IC supports programmable charging currents up to 4A using external resistors and implements an accurate Constant Current/Constant Voltage (CC/CV) charging algorithm. With support for an external MOSFET, charge status indicators, chip enable control, and battery over-voltage protection, the CN3302 is ideal for portable electronics, battery management systems, and embedded charging applications.

Key Features -

• Designed for charging 2-cell (2S) Lithium-Ion and Lithium-Polymer batteries

• Wide input voltage range of 2.75V to 6.5V

• Suitable for USB-powered charging applications

• Programmable charging current up to 4A using external resistors

• Constant Current/Constant Voltage (CC/CV) charging algorithm

• PFM boost converter architecture

• Supports external MOSFET for high-current charging

• Charge and standby status indicator outputs

• Chip Enable (CE) pin for charging control

• Built-in battery over-voltage protection

• Compact SOP-8 Surface Mount Device package

• High charging efficiency

Specifications -

• Product Type - Lithium Battery Charging Controller Integrated Circuit

• Model - CN3302

• Battery Type - 2-Cell (2S) Lithium-Ion / Lithium-Polymer

• Charging Method - Constant Current / Constant Voltage (CC/CV)

• Input Voltage (VIN) - 2.75V to 6.5V

• Maximum Programmable Charging Current - Up to 4A

• Converter Type - PFM Boost

• External MOSFET - Required

• Status Outputs - Charge Indicator, Standby Indicator

• Enable Control - Chip Enable (CE)

• Protection - Battery Over-Voltage Protection

• Package Type - SOP-8

• Mounting Type - Surface Mount Device

Applications -

• 2-cell Lithium battery chargers

• USB-powered charging devices

• Battery management systems

• Portable electronic equipment

• Rechargeable battery packs

• Power banks

• Industrial handheld devices

• Embedded charging systems

• Consumer electronics

• DIY battery charging projects