ME4058C6SG

ME4058 is a lithium battery charge control IC featuring trickle, constant current, and constant voltage charging modes. It supports fast and efficient charging of single-cell (4.2V/4.35V), dual-cell (8.4V/8.7V), or triple-cell (12.6V/13.05V) lithium batteries. The ME4058 operates over a wide input voltage range at a 450KHz switching frequency, employing a current-mode PWM buck switching topology to deliver a compact, simple, and highly efficient solution for fast lithium battery charging. The ME4058 sets the charge current via an external sense resistor, achieving a current accuracy within ±10%. Internally, a resistor divider network and a precision reference voltage set the float voltage of each cell to 4.2V/4.35V (single-cell), 8.4V or 8.7V (dual-cell), or 12.6V or 13.05V (triple-cell), with an accuracy of up to ±1%. An internal timer defines the trickle charge duration and current-mode charge duration. When charging is complete, if the battery voltage drops to approximately 3.5% below the float voltage, the controller automatically initiates a new charge cycle. When the input power is removed, the IC automatically enters sleep mode. The IC features real-time battery temperature monitoring and self-recovery capability.

Applications

• Portable laptops
• Portable DVD handheld devices

Key features

• Wide input voltage range: 6V~20V (4.2V or 4.35V version), 8.9V~20V (8.4V or 8.7V version), 15V~20V (12.6V or 13.05V version)
• High-efficiency current-mode PWM control architecture, 450KHz switching frequency
• Up to 2A charging current
• End-of-charge current detection output
• 6-hour charge termination timer
• ±1% charge voltage accuracy
• ±10% charge current accuracy
• Reverse leakage current as low as 9μA
• Automatic battery recharge
• Automatic trickle charge mode at low battery voltage
• Automatic sleep mode upon input power removal
• Battery temperature sensing
• Stable output with low-ESR ceramic capacitors