ANALOG DEVICES LTC4100EG#PBF Battery Charger IC, Li-Ion/Li-Pol/NiCd/NiMH, 28 V, Adjustable Volt/4 A Charge, 0 to 70 °C, SSOP-24

LTC4100 is a smart battery charger is a single chip charging solution that dramatically simplifies construction of an SBS compliant system. It implements a level 2 charger function whereby the charger can be programmed by the battery or by the host. A safety signal on the battery being charged is monitored for temperature, connectivity and battery type information. The SMBus interface remains alive when the AC power adapter is removed and responds to all SMBus activity directed to it, including safety signal status (via the charger status command). The charger also provides an interrupt to the host whenever a status change is detected (e.g., battery removal, AC adapter connection). Charging current and voltage are restricted to chemistry specific limits for improved system safety and reliability. Limits are programmable by two external resistors. It is used in applications such as portable instruments and computers, data storage systems and battery backup servers etc.

• Single chip smart battery charger controller, upto 4A charging current capability
• 100% compliant (Rev. 1.1) SMBus support allows for operation with or without host
• SMBus accelerator improves SMBus timing, user-selectable overvoltage and overcurrent limits
• Wide output voltage range is 3.5V to 26V, high noise immunity safety signal sensor
• Hardware interrupt and SMBAlert response eliminate interrupt polling
• High efficiency synchronous buck charger
• 0.5V dropout voltage; maximum duty cycle <gt/> 98%, AC adapter current limit maximizes charge rate
• ±0.8% voltage accuracy; ±4% current accuracy
• Operating temperature is -40°C to 85°C
• Package style is 24-lead plastic SSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party