Description

The SLM6900 is a charging circuit that supports multi-cell lithium or lithium iron phosphate batteries. It is preset with a three- or four-cell lithium battery charging mode and supports other output voltage modes that are regulated by a peripheral divider resistor. It is a step-down switching converter with a fixed frequency of 300KHz, so it has high charging efficiency and very low heat generation.

The SLM6900 includes a complete charge termination circuit, automatic recharge, and a charge voltage control circuit with an accuracy of ±1.0%. It integrates input low voltage protection,output short circuit protection, and battery temperature protection.

The SLM6900 is housed in a TSSOP-14L package and has a simple peripheral application as an efficient charger for large-capacity batteries.

Features

• ■Wide Input Voltage Range
• ■300KHz Fixed Switching Frequency
• ■Preset 3 or 4 Lithium Battery Output Voltages
• ■Adjustable Output Voltage
• ■Output Voltage Accuracy: ±1.0%
• ■Charging Status Dual Indication, No Battery and Fault Status Indication
• ■Low voltage trickle charging function
• ■Soft Start Limits Inrush Current
• ■Battery Temperature Monitoring Function
• ■High Surge Voltage Capability
• ■Packaging with TSSOP-14L

Absolute Maximum Ratings

• ■COMP: -0.3V~7.5V
• ■VIN: -0.3V~45V(Inrush)/-0.3V~30V(Continuous)
• ■others： -0.3V~VIN+0.3V
• ■BAT Short-Circuit Duration: Continuous
• ■Maximum Junction Temperature: 145℃
• ■Operating Temperature Range: -40℃ ~85℃
• ■Storage Temperature Range: -65℃~125℃
• ■Lead Temperature (Soldering, 10 sec) 260℃

Typical Application

Datasheet

SLM6900.pdf