SLM6400

The SLM6400 is a complete single- cell Li- Ion battery with a constant current constant voltage linear charger. The DFN- 8L package with heat sink on the bottom and fewer external components make the SLM6400 ideal for portable applications. The SLM6400 is suitable for USB power and adapter power supplies. Due to the internal PMOSFET architecture and anti- reverse charging path, no external isolation diodes are required. Thermal feedback automatically adjusts the charge current to limit chip temperature during high power operation or high ambient temperature conditions. The charging voltage is fixed at 4.2V and the charging current can be externally set by a resistor. When the charging current drops to the set value of 1/10 after reaching the final float voltage, the SLM6400 will automatically terminate the charge cycle. When the input voltage is removed, the SLM6400 automatically enters a low current state, reducing the battery leakage current to less than 5uA. The SLM6400 can also be placed in shutdown mode when there is power to reduce the supply current to 60uA.

Applications

• Mobile charging power supply
• MP3, MP4 player
• Digital camera
• E- dictionary
• GPS
• Portable devices, various chargers

Key features

• Input withstand voltage up to 28V
• Up to 1000mA charging current
• No MOSFET, sense resistor or isolation diode required
• For single- cell lithium- ion batteries
• Constant current/constant voltage operation with thermal regulation for maximum charge rate without risk of overheating
• 4.2V preset charging voltage with ± 1% accuracy
• Charge current monitor output for battery charge detection
• Automatic recharge
• Charge status dual output, no battery and fault status display
• C/10 charge termination
• 2.6V trickle charge threshold
• Soft start limits inrush current
• Battery temperature monitoring
• Available in a miniaturized DFN3*3- 8L package