Overview: CN3082 is a chip that can control the charging of various types of batteries, including single-cell lithium batteries, single-cell lithium iron phosphate batteries, or two to four nickel-metal hydride batteries. The device includes an internal power transistor, eliminating the need for external current-sensing resistors and current-limiting diodes. CN3082 requires very few external components and complies with USB bus technical specifications, making it ideal for portable products. 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 chip integrates a high-precision voltage comparator with 1% accuracy, allowing for precise setting of the constant-current charging termination voltage. The internal 8-bit analog-to-digital converter automatically adjusts the charging current based on the input voltage source's current output capability. Users do not need to consider worst-case scenarios, maximizing the utilization of the input voltage source's current output capability. This is particularly suitable for battery charging applications powered by voltage sources with limited current output capabilities, such as solar panels. The CN3082 charging current can be set via an external resistor. When the input voltage is cut off, the CN3082 automatically enters a low-power sleep mode, with battery current consumption less than 3 microamps. Other features include input undervoltage latch, trickle charging when the battery voltage is low, automatic recharging, battery temperature monitoring, and status indication. CN3082 uses a heat-enhanced 8-pin small outline package (SOP8).

Product Parameters

Main Functions: Multiple battery charger chips that can be powered by solar panels

Operating Mode: Linear

Battery Types: Lithium batteries, Lithium iron phosphate batteries, Lithium titanate batteries, Nickel-metal hydride batteries

Input Voltage: 4.4V-6V

Output Voltage Range: 0V-5.8V

Maximum Charging Current: 600mA

Maximum Output Current: 600mA

Operating Current: 650uA

Solar Power Supply: Yes

Thermal Modulation: Yes

Packaging Type: eSOP8

Chip Enable: No

Built-in Power Transistor: Yes

Applications:

l Mobile phones

l Digital cameras

l Electronic dictionaries

l Portable devices

l Applications requiring charging of lithium batteries, nickel-metal hydride batteries, lithium iron phosphate batteries, and lead-acid batteries

Features:

l Batteries can be charged using a USB interface or AC adapter

l On-chip power transistor

l Constant current charging termination voltage accuracy 1%

l An 8-bit analog-to-digital converter is integrated internally, which can automatically adjust the charging current according to the current output capability of the input voltage source

l Batteries can be charged using voltage sources with limited current output capability, such as solar panels

l Pre-charge mode with small current when the battery voltage is low

l User-settable continuous charging current up to 600mA

l Constant current/constant temperature charging mode is used, which can maximize the charging current and prevent the chip from overheating

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

l Status indication output can drive LED or interface with microcontroller

l Automatic recharging

l Battery temperature monitoring function

l SOP8 package

l Lead-free product