MAX1757

PRODUCTION

Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 14V Switch

Compact, 1-to-3 Cell Lithium-Ion Battery Charger Uses Internal Power Switch to Deliver Up to 1.5A

Data Sheet (Rev. 2) Product Selection Table
Part Models
2
1ku List Price
Starting From $9.51
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Part Details

  • Stand-Alone Charger Safely Charges Up to Three Li+ Batteries
    • Continuous Voltage and Temperature Monitoring
    • Input Current Limiting
    • ±0.8% Battery Regulation Voltage Accuracy
    • Up to 1.5A Programmable Charge Current
  • Low Power Consumption Extends Battery Life
    • 0.1µA Shutdown Battery Current
    • Low-Dropout 98% Duty Cycle
  • Flexible Input Voltage Range Enables the Use of Low Cost Wall Adapters
    • Input Voltage Up to 14V
    • Precharges Near-Dead Cells
  • Fixed 300kHz PWM Oscillator Allows Effective Noise Filtering
  • 28-Pin SSOP Package Saves Board Space
MAX1757
Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 14V Switch
MAX1757: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

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Evaluation Kits

MAX1757EVKIT

Evaluation Kit for the MAX1757, MAX1758

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Features and Benefits

  • Complete Li+ Charging Solution up to 3-Series Cells (MAX1757) and 4-Series Cells (MAX1758)
  • 1.5A Battery-Charging Current
  • Low Heat/High Efficiency
  • 300kHz PWM Operation
  • Up to 14V Input Voltage Range (MAX1757)
  • Up to 28V Input Voltage Range (MAX1758)
  • 28-Pin SSOP Package
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1757/MAX1758 evaluation kits (EV kits) are assembled and tested PC boards that implement a step-down, switching lithium-ion (Li+) battery charger. The MAX1757 EV kit can be set to charge 1- to 3-series cells, and the MAX1758 EV kit can be set to charge 1- to 4-series cells. The cell voltage can be set between 4.0V and 4.4V using standard 1% resistors while maintaining 1% overall regulation voltage accuracy. Three LEDs indicate the charging status.

The MAX1757/MAX1758 EV kits detect faulty cells and terminate charging. Two capacitors are used to set the charge termination, prequalification, and fault timeout periods. A user-supplied thermistor may be connected to either EV kit to monitor battery temperature and suspend charging for over-/undertemperature conditions.

Applications

  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Li+ Battery Packs
  • Notebook Computers
  • PDAs

MAX1758EVKIT

Evaluation Kit for the MAX1757, MAX1758

Buy Now View Details

Features and Benefits

  • Complete Li+ Charging Solution up to 3-Series Cells (MAX1757) and 4-Series Cells (MAX1758)
  • 1.5A Battery-Charging Current
  • Low Heat/High Efficiency
  • 300kHz PWM Operation
  • Up to 14V Input Voltage Range (MAX1757)
  • Up to 28V Input Voltage Range (MAX1758)
  • 28-Pin SSOP Package
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1757/MAX1758 evaluation kits (EV kits) are assembled and tested PC boards that implement a step-down, switching lithium-ion (Li+) battery charger. The MAX1757 EV kit can be set to charge 1- to 3-series cells, and the MAX1758 EV kit can be set to charge 1- to 4-series cells. The cell voltage can be set between 4.0V and 4.4V using standard 1% resistors while maintaining 1% overall regulation voltage accuracy. Three LEDs indicate the charging status.

The MAX1757/MAX1758 EV kits detect faulty cells and terminate charging. Two capacitors are used to set the charge termination, prequalification, and fault timeout periods. A user-supplied thermistor may be connected to either EV kit to monitor battery temperature and suspend charging for over-/undertemperature conditions.

Applications

  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Li+ Battery Packs
  • Notebook Computers
  • PDAs
MAX1757EVKIT
Evaluation Kit for the MAX1757, MAX1758
MAX1758EVKIT
Evaluation Kit for the MAX1757, MAX1758

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