MAX1538

PRODUCTION

Power-Source Selector for Dual-Battery Systems

Selector Provides Power-Source Control for Dual-Battery Systems, Minimizes System Cost

Part Models
2
1ku List Price
Starting From $3.96
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Part Details

  • Automatically Detects and Responds to:
    • Low-Battery Voltage Condition
    • Battery Insertion and Removal
    • AC-Adapter Presence
    • Airline-Adapter Presence
  • Step-Down and Step-Up Charger Compatibility
  • Fast Break-Before-Make Selection
    • Allows Hot Swapping of Power Sources
    • No External Schottky Diodes Needed
  • 50µA Maximum Battery Quiescent Current
  • Implements Battery Capacity Relearning
  • Allows Usage of Aircraft Supply
  • Direct Drive of P-Channel MOSFETs
  • Simplifies Power-Management µP Firmware
  • 4.75V to 28V AC-Adapter Input Voltage Range
  • Small 28-Pin Thin QFN Package (5mm x 5mm)
MAX1538
Power-Source Selector for Dual-Battery Systems
MAX1538: Typical Operating Circuit
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Evaluation Kits

MAX1538EVKIT

Evaluation Kit for the MAX1538

Features and Benefits

  • 4.75V to 28V AC-Adapter Input Range
  • Up to 10A Steering Capability
  • P-Channel MOSFET Steering Switches
  • Adjustable Battery Minimum Voltage Level
  • Adjustable Airline/AC-Adapter Detection Voltages
  • Manual-or Computer-Controlled Interface
  • On-Board Status LEDs
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1538 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that routes charge and discharge currents between two battery packs, a battery charger, and an AC-adapter power source. The circuit uses a MAX1538 IC in a 28-pin thin QFN package and is configured for a 4.75VDC to 28VDC AC-adapter input range.

The EV kit uses eight P-channel MOSFETs to steer current between the power sources and the load. The battery minimum voltage level sets the threshold for battery undervoltage conditions and can be adjusted from 4.65V to 13.0V.

Applications

  • Dual-Battery Portable Equipment
  • Internet Tablets
  • Notebook and Subnotebook Computers

MAX1538EVKIT
Evaluation Kit for the MAX1538

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