Analog Devices LTC4020EUHF | Demoboard DC2134B

Description

Demonstration circuit 2134B is a high power buck-boost multi-chemistry battery charger featuring the LTC®4020. 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 sheetmust be read in conjunction with this quick start guide.

Features

• 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

Typical applications

• Portable medical equipment
• Military Communications Equipment
• Portable Industrial and Medical Equipment
• Solar powered systems
• 12V to 24V Embedded Automotive Systems

More information

• Datasheet
• IC product information