Overview: CN3301 is a PFM boost type multi-cell battery charge control integrated circuit operating at 4.5V to 32V. CN3301 uses trickle, constant current, and quasi-constant voltage mode (Quasi-CVTM) to manage battery charging. It integrates a reference voltage source, inductor current detection unit, control circuit, and external field-effect transistor drive circuit, etc., featuring few external components and simple circuitry. When the input power is connected, CN3301 enters the charging state, controlling the external N-channel MOSFET to turn on, and the inductor current rises. When it rises to the upper limit set by the external current detection resistor, the external N-channel MOSFET turns off, and the inductor current decreases, transferring the energy in the inductor to the battery. When the inductor current drops to the lower limit set by the external current detection resistor, the external N-channel MOSFET turns on again, and this cycle repeats. When the FB pin voltage first reaches the internally set 1.205V (typical value), CN3301 enters quasi-constant voltage charging mode, charging the battery with a smaller current. Only when the FB pin voltage reaches 1.205V for the second time does the charging process end, and the external N-channel MOSFET remains off. In the charging completion state, when the FB pin voltage drops to the recharge threshold, CN3301 enters the charging state again. The maximum operating frequency of CN3301 can reach 1MHz, and the operating temperature range is from -40°C to +85°C. Other functions include solar maximum power point tracking, battery temperature monitoring compliant with JEITA standards, battery overvoltage protection, chip overtemperature protection, and two open-drain status indicator outputs. CN3301 is packaged in a 10-pin SSOP package (SSOP10).

Product Parameters

Main Functions: PFM Boost Multi-Cell Battery Charge Management Integrated Circuit

Operating Mode: Switching

Battery Type: Lithium battery, Lithium iron phosphate battery

Number of Batteries: Multi-cell

Input Voltage Range: 4.5V-32V

Operating Current: 380µA @ VIN=12V

Solar Power Supply: Yes

Thermal Modulation: No

Package Type: SSOP10

Maximum Output Power: 40W

Chip Enable: No

Built-in Power MOSFET: No

Applications:

l Multi-cell battery charge control

l Suitable for lithium batteries, lithium iron phosphate batteries, and lead-acid batteries

l Various small household appliances

l POS machines, audio equipment, etc.

l Electric bicycles, electric vehicles, etc.

Features:

l Input voltage range: 4.5V to 32V

l With maximum power point tracking function for solar power, solar power can be used

l Operating current: 380µA @ VIN=12V

l Inductor current detection

l Up to 1MHz switching frequency

l Quasi-constant voltage charging mode compensates for voltage loss caused by battery internal resistance and battery connection line resistance

l With trickle, constant current and quasi-constant voltage charging modes

l Automatic recharging function

l Up to 40W output power

l JEITA standard compliant battery temperature monitoring function

l Battery overvoltage protection

l Chip junction temperature over-temperature protection

l Two open-drain status indicator outputs

l Operating temperature range: -40°C to 85°C

l 10-pin SSOP package (SSOP10)

l Lead-free product, meets RoHS directive requirements, halogen-free