CN3302 PFM Step-up 2-cell Lithium Battery Charger IC

PublishTime：2022-10-20

●CN3302 is a PFM mode step-up battery charge management IC with operating voltage range between 2.7V to 6.5V. It is specially designed for 2-cell lithium battery charge management with fewer external components. CN3302 adopts constant current and quasi-constant voltage(Quasi-CVTM) mode to charge battery.
●On power up, CN3302 enters charging state, the external N-channel MOSFET is turned on, inductor current rises. When inductor current reaches upper threshold, 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 threshold, the N-channel MOSFET is turned on again. When BAT pin voltage reaches 8.4V(Typ.) for the first time, CN3302 enters quasi-CV mode, in which the charge currentis reduced. The charge process will not be terminated until BAT voltage reaches 8.4V for the second time. In termination mode, the N-channel MOSFET is turned off. When BAT voltage falls below recharge threshold, the CN3302 enters charge mode again. CN3302’s switching frequency can be up to 1MHz, which makes a small-profile inductor usable. If battery voltage is lower than input voltage by a diode drop, CN3302 will increase the off time to 5us to reduce the charge current as a protection for battery with the joint action of external N-channel and P-channel MOSFET
●The other features include chip enable input, status indication, etc.
●CN3302 is available in 8-pin SOP package
●Features:
■Input Voltage Range: 2.7V to 6.5V
■Operating Current: 280uA@VIN=5V
■Inductor Current Detection
■Switching Frequency up to 1MHz
■Quasi-CV mode to Compensate for the Voltage Loss on Battery Internal Resistance and Trace Resistance
■Automatic Recharge
■Output Powerup to 35W
■Protection for Low Battery Voltage and Short Battery
■Automatic Adaptability to Input Supply with Limited Driving Capability
■Chip Enable Input
■Battery Overvoltage Protection
■Status Indication
■Operating Temperature : －40°Cto 85°C
■Available in SOP8 Package
■Lead-free, rohs-Compliant and Halogen Free

Brand of Product：	consonance-elec
Part#：	CN3302 More Part#
Product Category：	PFM Step-up 2-cell Lithium Battery Charger IC More
Application：	[ 2-cell Li+ Battery Charging Management ][ Power Bank ][ POS ][ Electric Fan ][ Audio System ][ Standalone Charger ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	SOP8
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2021/7/22
Version Number：	REV 1.0
Data Encoding：
Data Size：	425 KB

Data section preview(2pages)

- The full preview is over. If you want to read the whole 14 page document,please Sign in/Register -

Download

+1 Like
Add to Favorites

Recommend

Technical Resources

More>

All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.

Integrated Circuits