Electronicdesign 7618 0807npdtltc
Electronicdesign 7618 0807npdtltc
Electronicdesign 7618 0807npdtltc
Electronicdesign 7618 0807npdtltc
Electronicdesign 7618 0807npdtltc

Synchronous Buck Battery Charger Accommodates Various Inputs With 40-V Operation

Aug. 11, 2014
Thanks to its high-efficiency, synchronous step-down topology, the LTC4121 constant-current/constant-voltage 400-mA battery charger accepts a 4.4- to 40-V input.

Thanks to its high-efficiency, synchronous step-down topology, the LTC4121 constant-current/constant-voltage 400-mA battery charger accepts a 4.4- to 40-V input. The charger, developed by Linear Tech, maintains a programmable 3.5- o 18-V battery charge voltage range with tight +1% accuracy, suiting it for battery chemistries such as lithium-ion, LiFePO4, and lead-acid. In addition, a fixed-output, float-voltage version—the LTC4141-4.2—will fit 1S lithium-ion battery packs. The synchronous architecture enables charging efficiency up to 94%, as well as low-dropout startup and operation. The LTC4121 can regulate its input voltage to a programmable percentage of the input open-circuit voltage to accommodate high-impedance input sources (e.g., solar panels). If the input voltage falls below the user-defined percentage of the open-circuit voltage, it automatically reduces charge current. Programmable charge current ranges from 50 to 400 mA (there’s also low-voltage battery preconditioning). A recharge function starts a new charging cycle if the battery voltage drops 2.2% below the programmed charge voltage. Packaging is a 16-pin, 3- by 3-mm QFN; operating temperature ranges from ‒40 to 125°C.

LINEAR TECHNOLOGY CORP.

Sponsored Recommendations

Highly Integrated 20A Digital Power Module for High Current Applications

March 20, 2024
Renesas latest power module delivers the highest efficiency (up to 94% peak) and fast time-to-market solution in an extremely small footprint. The RRM12120 is ideal for space...

Empowering Innovation: Your Power Partner for Tomorrow's Challenges

March 20, 2024
Discover how innovation, quality, and reliability are embedded into every aspect of Renesas' power products.

Article: Meeting the challenges of power conversion in e-bikes

March 18, 2024
Managing electrical noise in a compact and lightweight vehicle is a perpetual obstacle

Power modules provide high-efficiency conversion between 400V and 800V systems for electric vehicles

March 18, 2024
Porsche, Hyundai and GMC all are converting 400 – 800V today in very different ways. Learn more about how power modules stack up to these discrete designs.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!