Product Introduction

Product parameters

Funtion：PFM Switch-mode Step-up Battery Charger IC

Opration Mode：Switch

Battery：Lithium-ion,LiFEPO4 and Lead-Acid Battery

Vout Range：Adjust

Vin Range：4.5V to 32V

Operating Current：380uA@VIN=12V

Solar Panel charge：Yes

Chip Temperature Regulation：No

Package：SSOP10

Max Output Power：40W

Chip Enable：No

On-chip Power MOSFET：No

General Descriptions:

CN3301 is a PFM mode step-up battery charging controller IC with operating voltage range between 4.5V to 32V. CN3301 adopts trickle, constant current(CC) and quasi-constant voltage(Quasi-CV^TM) mode to charge battery, very suitable for Lithium, LiFePO4 and Lead-acid battery charging with fewer external components.

On power up, CN3301 enters charging mode, the external N-channel MOSFET is turned on, inductor current rises. When inductor current reaches upper limit, the N-channel MOSFET is turned off, inductor is discharged, the energy stored in inductor is transferred to battery. When the inductor current is discharged to its lower limit, the N-channel MOSFET is turned on again, and so forth. When FB pin voltage reaches 1.205V(Typ.) for the first time, CN3301 enters quasi-CV mode, in which the charge current is reduced. The charge process will not be terminated until FB voltage reaches 1.205V for the second time. In termination mode, the N-channel MOSFET is turned off. If FB voltage falls below recharge threshold, CN3301 enters charge mode again. CN3301’s switching frequency can be up to 1MHz, which makes a small-profile inductor usable.

The other features include solar panel’s maximum power point tracking, JEITA-compliant battery temperature monitoring, chip over temperature protection and status indication, etc.

CN3301 is available in 10-pin SSOP package.

Applications:

l Standalone Multi-cell Battery Charger

l Charging Management for Lithium, LiFePO4, Lead-acid Batteries

l Electrical Appliance

l Audio Systems

l E-bike, etc.

Features:

l Input Voltage Range: 4.5V to 32V

l Maximum Power Point Tracking for Solar Panel

l Operating Current: 380uA@VIN=12V

l Inductor Current Sensing