Overview: CN3153B is an integrated circuit that can manage constant current/constant voltage charging of a single-cell lithium battery. The device includes internal power transistors, eliminating the need for external current sensing resistors and current limiting diodes. CN3153B requires very few external components, making it ideal for portable applications. A thermal modulation circuit keeps the chip temperature within a safe range when the device's power consumption is high or the ambient temperature is high. The constant voltage charging voltage can be adjusted via an external resistor. The charging current is set by an external resistor. When the battery voltage is low, CN3153B enters trickle charging mode, and the trickle charging current can be selected as 10% or 100% of the constant current charging current. When the input voltage is cut off, CN3153B automatically enters a low-power sleep mode, with battery current consumption less than 3 microamps. Other functions include battery short-circuit protection, input undervoltage latch, automatic recharging, and charging status/charging completion status indication. CN3153B is available in an 8-pin small outline package (SOP8).

Product Parameters

Main Functions: 500mA Ampere Lithium Battery Charging Management Integrated Circuit

Operating Mode: Linear

Battery Type: Lithium-ion Battery

Number of Batteries: 1

Input Voltage: 3.8V-6V

Output Voltage Range: 0V-4.2V

Maximum Charging Current: 500mA

Maximum Output Current: 500mA

Operating Current: 450uA

Solar Power Supply: No

Thermal Modulation: Yes

Packaging Form: Standard Operating Procedure 8

Chip Enable: No

Built-in Power Tube: Yes

Applications:

l E-cigarettes

l Digital Cameras

l Power Banks

l Electronic Dictionaries

l Portable Devices

l Various Chargers

Features:

l On-chip power transistor

l No external current limiting diodes and current sensing resistors required

l Trickle charging mode is used at lower battery voltages to activate deeply discharged batteries

l Trickle charging current can be selected as 10% or 100% of the constant current charging current

l Can be used as a voltage source

l Battery short circuit protection

l Constant voltage charging voltage can be adjusted upwards via an external resistor

l Maximum constant current charging current: 500mA

l Charges using constant current/constant voltage/constant temperature mode, maximizing charging current while preventing chip overheating

l Automatically enters low-power sleep mode when the power supply voltage drops

l Charging status and charging completion status indication output

l C/10 charging completion

l Automatic recharging

l Lead-free product, RoHS compliant, halogen-free