Description

SLM6705 is a 2 cell Li-ion battery charger that supports wide voltage input. It is a synchronous buck converter with a fixed frequency of 700KHz. It has a charging efficiency of more than 95%, and a very small calorific value.

SLM6705 includes a complete charging termination circuit, automatic recharging and a preset charging voltage of 8.4V with an accuracy of ±1.0%. SLM6705 has many functions, such as anti back filling protection, output short circuit protection, chip and battery temperature protection.

SLM6705 is packaged in an E-SOP8 package with a heat sink and requires very few peripheral components, enabling it to be embedded in a variety of hand held applications as an efficient charger for high-capacity batteries.

Features

• ■Fixed switching frequency of 700KHz
• ■High output efficiency of more than 95%
• ■There is no need to prevent reverse current diode
• ■No external power MOS transistor or freewheeling diode is required
• ■Accuracy of 8.4V charging voltage with accuracy of ± 1%
• ■Display power status and charging status
• ■Battery-side reverse leakage current less than 5uA
• ■5.55V trickle charging
• ■Soft start limits surge current
• ■Battery temperature monitoring function
• ■Output short circuit protection function
• ■8-pin SOP package with heat sink

Absolute Maximum Ratings

• ■Input power voltage(VIN): -0.3V~22V
• ■BAT,VS: -0.3V~20V
• ■LX: -0.3V~VIN+0.3V
• ■BST: LX-0.3V~LX+5.5V
• ■NCHRG,NACOK: -0.3V~VIN+0.3V
• ■NTC: -0.3V~6.5V
• ■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

SLM6705.pdf