Overview: CN3130 is a rechargeable button battery charge management chip that can be powered by solar panels. The device includes power transistors internally, and does not require external current detection resistors and current limiting diodes during application. The internal adaptive charging current module can automatically adjust the charging current according to the current output capability of the input power supply. Users do not need to consider the worst-case scenario, and can maximize the use of the current output capability of the input power supply. It is very suitable for applications powered by power supplies with limited current output capabilities, such as solar panels. CN3130 requires very few external components, making it ideal for portable applications. A thermal modulation circuit can control 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 3.3V, which can also be adjusted upward through an external resistor. It is very suitable for charging applications of button lithium manganese batteries, lithium iron phosphate batteries, and lithium batteries. The charging current is set by an external resistor. When the input voltage is powered down, the CN3130 automatically enters a low-power sleep mode, at which time the battery current consumption is less than 3 microamps. Other functions include input undervoltage latch, automatic recharging, and charging status indication. CN3130 is packaged in a 6-pin SOT23 package (SOT23-6).

Product Parameters

Main Functions: Button battery charging management chip that can be powered by solar panels

Operating Mode: Linear

Battery Type: Button Battery

Number of Batteries: 1

Input Voltage: 3.9V-6V

Output Voltage Range: 0V-3.3V

Maximum Charging Current: 300mA

Maximum Output Current: 300mA

Operating Current: 500uA

Solar Power Supply: Yes

Thermal Modulation: Yes

Packaging Type: SOT23-6

Chip Enable: No

Built-in Power Transistor: Yes

Applications:

l Wearable Devices

l Smart Home

l Medical Devices

l Calculators

l Water meters, gas meters, electricity meters, etc.

l Measuring instruments, sensors, etc.

Features:

l Automatically adjusts the charging current based on the current output capability of the input voltage source

l Can be powered by voltage sources with limited current output capability, such as solar panels

l Very suitable for charging applications of button-type lithium manganese batteries, lithium iron phosphate batteries, and lithium batteries

l Input voltage range: 3.9V to 6V

l On-chip power transistor

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

l Constant voltage charging voltage 3.3V, can also be adjusted upward through 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 range 10mA to 300mA

l Charging using constant current/constant voltage/constant temperature mode, which maximizes charging current while preventing chip overheating

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

l Charging status indication output

l C/10 charging completion detection

l Automatic recharging

l SOT23-6 package

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