CN3058 LiFePO4 battery charger circuit

CN3058 LiFePO4 battery charger circuit

CN3058 LiFePO4 battery charger circuit. CN3058E is an integrated circuit that can manage constant current/constant voltage charging for single-cell lithium iron phosphate batteries. The device includes power transistors internally, eliminating the need for external current sensing resistors and current limiting diodes. CN3058E requires only a few peripheral components, making it highly suitable for portable applications. The thermal modulation circuit can control the chip temperature within a safe range when the device has high power consumption or the ambient temperature is high. The internal fixed constant voltage for charging is 3.6V, which can also be adjusted through an external resistor. The charging current is set through an external resistor. When the input voltage (AC adapter or USB power) is disconnected, CN3058E automatically enters a low-power sleep mode, with battery current consumption less than 3 microamps. Other features include input undervoltage lockout, automatic recharging, battery temperature monitoring, and charging status/charging completion indication. CN3058E is available in a small package with enhanced heat dissipation, the SOP8 package.

Scchematic circuit LiFePO4 battery charger CN3058

Cn3058 Lifepo4 Battery Charger Circuit
Cn3058 Lifepo4 Battery Charger Circuit

About LiFePO4 battery

LiFePO4 (Lithium Iron Phosphate) battery is a type of rechargeable battery that has gained significant popularity recently due to its numerous advantages. This battery chemistry offers a higher energy density, longer lifespan, and improved safety compared to other lithium-ion battery types. LiFePO4 batteries are known for their excellent thermal stability, reducing the risk of overheating or combustion. Additionally, they have a slow self-discharge rate, allowing them to retain their charge for longer periods when not in use. These batteries are widely used in various applications ranging from electric vehicles and renewable energy storage systems to portable devices and backup power supplies. With its exceptional performance and reliability, LiFePO4 battery technology continues to revolutionize the energy storage industry.

Characteristics CN3058 LiFePO4 battery charger:

  • Independent single-section lithium iron phosphate battery charging management
  • Input voltage range: 3.8V to 6V
  • On-chip power transistor
  • No need for external current-limiting diode and current sensing resistor
  • Constant voltage charging voltage of 3.6V, adjustable through an external resistor
  • To activate deeply discharged batteries and reduce power consumption, a low current pre-charge mode is used when the battery voltage is low
  • Adjustable continuous constant current charging current up to 1A
  • Charging in constant current/constant voltage/constant temperature mode, which maximizes charging current and prevents chip overheating
  • Automatically enters low power sleep mode when power supply voltage drops
  • Dual indication outputs for charging status and charging completion status
  • C/10 charging completion detection
  • Automatic recharging
  • Battery temperature monitoring function
  • Enhanced heat dissipation in a small package with 8 pins (SOP8)

PCB CN3058 LiFePO4 battery charger circuit

Pcb Top Cn3058 Lifepo4 Battery Charger Circuit
Pcb Top Cn3058 Lifepo4 Battery Charger Circuit
Pcb Bottom Cn3058 Lifepo4 Battery Charger Circuit
Pcb Bottom Cn3058 Lifepo4 Battery Charger Circuit

BOM to assemble LiFePO4 battery charger with CN3058 and HY2112

Last updated: 10/14/2023 10:14

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Value Name Description Quantity
POWER IN USB1 USB Type-C 2-pin connector 1
FS8205 Q1 N Channel Dual Mosfet SOT-23-6 1
HY2112 U2 LiFePO4 Battery Overcharge Protector SOT-23-6 1
CN3058E U1 LiFePO4 Battery Charger SOP-8_150MIL 1
CHARGE LED1 Red LED 0603 1
FULL LED2 Green LED 0603 1
1k (102) R1 Resistor 0603 1
1k2 (122) R2 Resistor 0603 1
100R (101) R3 Resistor 0603 1
2k (202) R4 Resistor 0603 1
1u C1 Ceramic Capacitor 0603 1
10u C2 Ceramic Capacitor 0603 1
100n C3 Ceramic Capacitor 0603 1
Connector BAT,VOUT,VIN HDR-1X2/2.54 3


Download the files for assembly LiFePO4 battery charger.

Buy CN3058


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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

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