ME4086ESPG

ME4086 is a lithium battery charge management IC featuring constant-current/constant-voltage (CC/CV) charging mode, capable of fast and efficient charging for single-cell (4.2V/4.35V), dual-cell (8.4V), or triple-cell (12.6V) lithium batteries. It employs a current-mode PWM buck switching control architecture, providing a compact, simple, and highly efficient solution. The IC integrates a built-in reverse-current protection function, eliminating the need for an input-side diode in practical applications. Charging current is set by an external sense resistor with high accuracy; float voltage is set by internal voltage-divider resistors and a precision reference, achieving ±1% accuracy. When the input power supply is removed, the IC automatically enters a low-current sleep mode, reducing battery leakage current to as low as 3 μA. After a charge cycle completes, if the battery voltage drops to the recharge threshold (4.1V/4.23V for single-cell, 8.2V for dual-cell, 12.2V for triple-cell), the IC will automatically restart charging.

Applications

• Charging equipment
• Portable laptops
• Handheld devices

Key features

• Input operating voltage range: single-cell 4.7V~16V, dual-cell 10V~20V, triple-cell 14V~22V
• Input withstand voltage: 24V
• Built-in reverse current protection
• Built-in input adaptive function
• Built-in soft-start to prevent large inrush current at power-on
• High-efficiency current-mode PWM buck switching control architecture
• Charge current accuracy: ±10%
• Fixed switching frequency for minimum noise
• Charge voltage accuracy: ±1%
• Automatic recharge
• Automatic sleep mode upon input power removal
• Automatic trickle charge mode when battery voltage is low
• Stable output with low-ESR ceramic capacitors
• Battery temperature detection