WB6058B

WB6058B 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 1A. Its compact package and minimal external components make 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 battery replenishment; and constant-voltage charging to fully charge the battery. The IC features a built-in thermal foldback function that reduces the charge current when the temperature reaches the set threshold, minimizing heat generation. With an integrated power transistor, no external current-sense resistor or reverse-blocking diode is required. It supports battery reverse-polarity protection — the IC will not be damaged even if the battery is connected in reverse. The constant-current charge current is adjustable via an external resistor. After the battery is fully charged, the IC continuously monitors the battery voltage and automatically restarts charging when the voltage drops below the set threshold. The package type is ESOP-8.

Applications

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

Key features

• Maximum input withstand voltage: 32V
• Standby current consumption: <1.5μA
• Battery reverse polarity protection — no IC damage even if battery is connected in reverse during charging
• ±1% full-charge voltage accuracy; selectable charge termination voltage: 4.2V / 4.35V
• ±8% constant-current charge accuracy; constant-current value adjustable via external resistor; maximum charge current: 1A
• Supports single-cell Li-ion and Li-ion polymer batteries
• NTC battery temperature monitoring
• Input overvoltage protection
• Soft-start
• Thermal foldback
• Surge protection