Overview: CN3165 is a single-cell lithium battery charge management chip that can be powered by solar panels. The device includes internal power transistors, eliminating the need for external current sensing resistors and current limiting diodes. The internal adaptive charging current module automatically adjusts the charging current based on the input power's current output capability. Users do not need to consider worst-case scenarios, maximizing the utilization of the input power's current output capability. This makes it ideal for lithium battery charging applications powered by sources with limited current output, such as solar panels. CN3165 requires minimal external components, making it suitable for portable applications. The thermal modulation circuit controls the chip temperature within a safe range when the device's power consumption is high or the ambient temperature is high. The internal fixed constant voltage charging voltage is 4.2V, which can also be adjusted upward via an external resistor. The charging current is set via an external resistor. When the input voltage is cut off, CN3165 automatically enters a low-power sleep mode, with battery current consumption less than 3µA. Other functions include input undervoltage lockout, automatic recharge, battery temperature monitoring, and charging status/charging completion status indication. CN3165 is available in a heat-enhanced 8-pin DFN package.

Product Parameters

Main Functions: A single-cell lithium battery charge management chip that can be powered by solar panels

Operating Mode: Linear

Battery Type: Lithium-ion battery

Number of Batteries: 1

Input Voltage: 4.4V-6V

Output Voltage Range: 0V-4.2V

Maximum Charging Current: 1A

Maximum Output Current: 1A

Operating Current: 500uA

Solar Power Supply: Yes

Thermal Modulation: Yes

Packaging Type: DFN8

Chip Enable: No

Built-in Power Transistor: Yes

Applications:

l Solar chargers

l Applications using solar panels for charging

l Applications with limited input power current output capability

l Portable devices

l Various chargers

Features:

l The internal integrated charging current adaptive module automatically adjusts the charging current according to the current output capability of the input voltage source.

l Lithium battery charging applications that can be powered by voltage sources with limited output current capability, such as solar panels.

l Input voltage range: 4.4V to 6V

l On-chip power transistor

l No external current limiting diodes and current sensing resistors are needed.

l Constant voltage charging voltage 4.2V, which can also be adjusted upwards via an external resistor.

l Can be used as a voltage source.

l Internal soft-start circuit

l Trickle charging mode is used when the battery voltage is low to activate deeply discharged batteries and reduce power consumption.

l Settable constant current charging current up to 1A

l Constant current/constant voltage/constant temperature charging mode is used to maximize charging current and prevent chip overheating.

l Automatically enters low-power sleep mode when the power supply voltage is cut off.

l Dual indicator output for charging status and charging completion status

l C/10 charging completion detection

l Automatic recharging

l Battery temperature monitoring function

l DFN-8 package

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