LGS4056HDA-4.35

LGS4056H is a linear lithium battery charge management IC integrating battery charging management and charge status indication functions, providing a complete power solution for single-cell lithium batteries. The IC features four charging stages: short-circuit current, trickle current, constant current, and constant voltage. Short-circuit charging enables charging of 0V batteries; trickle charging pre-charges fully discharged batteries; constant current charging rapidly charges the battery; and constant voltage charging ensures safe battery charging. The LGS4056H has a default charge termination voltage of 4.2V, with programmable charge current via an external resistor and a maximum charge current of 1A. When the charge current drops to one-tenth of the set termination voltage, the IC automatically terminates the charging process and continuously monitors the battery voltage, automatically restarting charging when the voltage drops below a defined threshold. When the input voltage is removed, the IC automatically enters low-power mode, with battery leakage current below 1μA.

Applications

• Mobile multimedia devices
• Portable lithium battery-powered devices with USB input

Key features

• Built-in high input voltage linear charger with adjustable charge current
• Input voltage range: 4V~24V (surge voltage up to 28V)
• Maximum charge current up to 1A in CC mode, supports real-time charge current configuration via external resistor
• Compatible with 5V USB power and AC adapters, with hot-plug protection
• Supports 4.2V/4.35V Li-ion battery types (default no-suffix version is 4.2V)
• Intelligent charge current adjustment based on battery temperature and input voltage
• Battery reverse-current blocking, battery leakage current less than 1μA
• Comprehensive charge status indication and fault indication (e.g., battery not connected)
• Protection features: UVLO, over-temperature protection, OVP, charge current thermal regulation, CC charge soft-start
• Junction temperature range: -40℃ to +85℃
• All pins feature ±2000V HBM ESD protection