LR LR5110-N

LR5110 is a highly integrated, cost-effective single-cell Li-Ion battery charger IC. It employs a constant-current/constant-voltage linear control architecture with a minimal external component count, making it ideal for portable applications and compatible with both USB power supplies and AC adapter power sources. The IC features an internal PMOSFET architecture with an integrated reverse-blocking circuit, eliminating the need for external sense resistors and isolation diodes. Its thermal feedback function automatically adjusts the charge current to limit the die temperature during high-power operation or elevated ambient temperature conditions. The full charge voltage is fixed at 4.2V. The charge current can be programmed via an external resistor on the PROG pin, up to a maximum of 1.0A. When the input voltage (AC adapter or USB power) is removed, the LR5110 automatically enters a low-current state, with battery leakage current below 3uA. Additional features include charge current monitoring, input overvoltage protection, undervoltage lockout, automatic recharge, and two status pins for indicating end-of-charge and input voltage presence.

• Up to 32V input voltage with 6.9V overvoltage protection
• No external MOSFET, sense resistor, or isolation diode required
• High-accuracy full-charge detection voltage threshold: 4.2V (±1%)
• Standby current below 3uA
• BAT-VDD reverse current blocking
• 0V battery charging supported
• Linear charging mode, up to 1.0A charge current
• Three-stage charging: trickle / constant current / constant voltage
• Externally adjustable charge current
• Intelligent thermal regulation of charge current
• Battery temperature detection and protection
• Automatic recharge
• Charge status indication
• Compliant with latest IEC62368 standard
• DFN2x2-8 package

• Mobile phone charging docks
• Portable media players
• Bluetooth headsets