WB6058G

WB6058G is a single-cell, fully integrated CC/CV linear lithium battery charger IC with a 32V input voltage rating and a maximum charge current of 600mA. It features a compact package with minimal external components, making it particularly suitable for handheld device applications. The charging process consists of three stages: pre-charge to recover deeply discharged batteries; constant current charging for rapid capacity replenishment; and constant voltage charging for full battery charge. The IC incorporates a thermal foldback function that reduces charge current when temperature reaches the set threshold to minimize heat dissipation. With an integrated power transistor, no external current sense resistor or reverse-blocking diode is required, and reverse battery protection is supported — the IC will not be damaged even if the battery is connected in reverse polarity. The constant current charge level is adjustable via an external resistor. After the battery is fully charged, the IC continuously monitors battery voltage and automatically restarts charging when the voltage drops below the programmed threshold.

Applications

• Handheld devices
• Bluetooth devices
• Power tools
• E-cigarettes
• Wearable devices
• Portable devices

Key features

• Standby current <1.5μA
• Battery reverse polarity protection — no IC damage even if battery is connected in reverse during charging
• ±0.5% full-charge voltage accuracy, selectable charge termination voltage: 4.2/4.35V
• ±8% CC charging current accuracy, CC charging current adjustable via external resistor, max charging current 600mA
• Single-cell Li-ion battery charging support
• Input overvoltage protection
• Soft-start
• Thermal foldback
• Surge protection