LTC4020

RECOMMENDED FOR NEW DESIGNS

55V Buck-Boost Multi-Chemistry Battery Charger

Data Sheet (Rev. E) Product Selection Table
Part Models
4
1ku List Price
Starting From $5.90
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  • Documentation
  • Software Resources
  • Hardware Ecosystem
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    Part Details

    • Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums)
    • Synchronous Buck-Boost DC/DC Controller
    • Li-Ion and Lead-Acid Charge Algorithms
    • ±0.5% Float Voltage Accuracy
    • ±5% Charge Current Accuracy
    • Instant-On for Heavily Discharged Batteries
    • Ideal Diode Controller Provides Low Loss PowerPath When Input Power is Limited
    • Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation
    • Onboard Timer for Protection and Termination
    • Bad Battery Detection with Auto-Reset
    • NTC Input for Temperature Qualified Charging
    • Binary Coded Open-Collector Status Pins
    • Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package
    LTC4020
    55V Buck-Boost Multi-Chemistry Battery Charger
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    Documentation

    Data Sheet 1

    Reliability Data 1

    User Guide 4

    Application Note 1

    Design Note 1

    Technical Articles 2

    Learn More

    Software Resources

    Can't find the software or driver you need?

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    Hardware Ecosystem

    Parts Product Life Cycle Description
    PowerPath, Ideal Diodes, and Load Switches 1
    LTC4417
    		RECOMMENDED FOR NEW DESIGNS Prioritized PowerPath™ Controller
    Pushbutton Controllers 1
    LTC2956
    		RECOMMENDED FOR NEW DESIGNS Wake-Up Timer with Pushbutton Control
    Surge Stopper, Overvoltage, and Overcurrent Protection 1
    LT4363
    		RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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    Tools & Simulations

    LTspice 1

    Models for the following parts are available in LTspice:

    • LTC4020
    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    Evaluation Kits

    eval board
    schematic 1
    schematic 2
    schematic 3
    schematic 4
    DC2044B

    LTC4020EUHF | High Voltage Buck-Boost Multi-Chemistry Battery Charger

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    Product Details

    Demonstration circuit 2044B is a 55V buck-boost multi-chemistry battery charger featuring the LTC4020. The board will accept an input voltage between 15V and 55V. The float voltage of the battery output (BAT) is 25.2V, with 3.3A maximum charge current. The converter output (VOUT) has a voltage range of 21V to 28V, with 3A maximum load current. The LTC4020 contains a high efficiency synchronous buck-boost DC/DC controller and uses a proprietary average current mode architecture.

    The LTC4020 battery charger can provide a constant-current/constant-voltage charge algorithm (CC/CV); a four-step, three-stage lead-acid battery-charge profile or constant-current charging (CC). Battery-chemistry type is selected using on-board jumper JP1.

    The LTC4020 data sheet gives a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.

    eval board
    schematic 5
    schematic 6
    schematic 7
    schematic 8
    DC2134B

    LTC4020EUHF | High Power Buck-Boost Multi‑Chemistry Battery Charger

    Buy Now View Details

    Product Details

    Demonstration circuit 2134B is a high power buck-boost multi-chemistry battery charger featuring the LTC4020. The board will accept an input voltage between 15V and 55V. The float voltage of the battery output (BAT) is 25.2V, with 6.3A maximum charge current. The converter output (VOUT) has a voltage range of 21V to 28V, with 8A maximum load current. The LTC4020 contains a high efficiency synchronous buck-boost DC/DC controller and uses a proprietary average current mode architecture.

    The LTC4020 battery charger can provide a constantcurrent/constant-voltage charge algorithm (CC/CV); a four-step, three-stage lead-acid battery-charge profile or constant-current charging (CC). Battery-chemistry type is selected using onboard jumper JP1.

    The LTC4020 data sheet gives a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.
    DC2044B
    LTC4020EUHF | High Voltage Buck-Boost Multi-Chemistry Battery Charger
    DC2134B
    LTC4020EUHF | High Power Buck-Boost Multi‑Chemistry Battery Charger

    Latest Discussions

    1 Days Ago
    problem with new PCB wth LTC4020EUHF
    11 Weeks Ago
    LTC 4020 Input Voltage Regulation
    19 Weeks Ago
    LTC4020 Discharge
    View related discussion on EngineerZone®

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