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Analog Devices / Maxim Integrated MAX20094/MAX20095 CC/CV Battery Chargers

Analog Devices Inc. MAX20094/MAX20095 CC/CV Battery Chargers provide a high-efficiency synchronous boost controller to supply critical systems in the event the primary power source is lost. The configurable constant-current/constant-voltage (CC/CV) battery charger offers diagnostic features to check battery state-of-health (SOH) and IC functionality. Charging thresholds and boost output voltage are configurable to support popular battery chemistries and a wide range of cell counts.

The MAX20094/MAX20095 CC/CV Battery Chargers have an I2C slave port through which configuration and status bits can be accessed, to support system integration. A switching frequency of 2.2MHz also helps to reduce system costs by minimizing inductor size. The MAX20094/MAX20095 also provides a precision battery SOH check and has built-in functionality to minimize leakage current out of the backup battery (BUB).

The MAX20094/MAX20095 is available in a 28-pin (5mm x 5mm) side-wettable TQFN package and is AECQ-100 qualified.

Features

  • Efficient Solution
    • Minimum 2V sync boost with n-Channel FET control
    • Skip mode guarantees >50% efficiency at 1mA
  • Multiple functions to enable small solution size
    • 3V to 6V CC/CV battery charger
    • I2C-settable charging current up to 1A
    • I2C-selectable CV voltage and CC current levels
    • Gate-driver output for p-Channel load disconnect
    • Backup battery switchover-trigger signal
  • State-of-health for backup battery monitoring
    • I2C diagnostics and control interface 
    • Accurate internal current sink for battery impedance measurement
    • Analog readout of internal sink current from backup battery
    • Remote sense for BATT_ voltage measurement
  • Robust for automotive environment
    • 3.5V to 36V VIN (40V load-dump tolerant)
    • <1µA leakage for pins connected to the battery
    • -40°C to +125°C operating temperature tange
    • 28-pin, side-wettable TQFN package enables optical inspection

Applications

  • Automotive telematics battery backup
  • Single or multicell battery-backup systems

Evaluation Kit

Analog Devices / Maxim Integrated MAX20094EVKIT/MAX20095EVKIT Evaluation Kits

Fully assembled and tested application circuits for the MAX20094/MAX20095 backup battery chargers.

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Pubblicato: 2019-11-04 | Aggiornato: 2023-05-02