LTC1980
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LTC1980

Combination Battery Charger and DC/DC Converter

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Part Details
Part Models 2
1ku List Price Starting From $4.53
Features
  • Single Controller IC Includes Battery Charger Plus DC/DC Converter
  • Wall Adapter Voltage May be Above or Below Battery Voltage
  • LDO Controller Allows Simultaneous Charging and Regulating from Wall Adapter Input
  • Standalone Li-Ion Battery Charger Including Charge Termination, Overvoltage Protection, Shorted-Cell Detection and Battery Recharge
  • Selectable 4.1V, 4.2V, 8.2V and 8.4V Float Voltages
  • Simple NiMH and NiCd Battery Charger
  • Pin Programmable Regulator Burst Mode® Operation and Shutdown for High Efficiency
  • High Efficiency Current Mode 300kHz PWM
  • Reduced Component Architecture
  • Undervoltage Protection and Soft-Start Insures Start-Up with Current Limited Wall Adapter
  • Small 24-Pin SSOP Package
Additional Details
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The LTC1980 integrates PWM power control for charging a battery and converting the battery voltage to a regulated output or simultaneously charging the battery while powering a system load from an unregulated AC wall adapter. Combining these features into a single IC produces a smaller area and lower cost solution compared to presently available multi-IC solutions. The LTC1980 shares the discrete components for both the battery charger and the DC/DC converter thus minimizing size and cost relative to dual controller solutions. Both the battery charger and DC/DC converter use a current mode flyback topology for high efficiency and excellent transient response. Optional Burst Mode operation and power-down mode allow power density, efficiency and output ripple to be tailored to the application.

The LTC1980 provides a complete Li-Ion battery charger with charge termination timer, preset Li-Ion battery voltages, overvoltage and undervoltage protection, and userprogrammable constant-current charging. Automatic battery recharging, shorted-cell detection, and open-drain C/10 and wall plug detect outputs are also provided. User programming allows NiMH and NiCd battery chemistries to be charged as well.

Applications

  • Digital Cameras
  • Handheld Computers
  • Personal Digital Assistants
  • 1W to 10W Uninterruptable Power Supplies
Part Models 2
1ku List Price Starting From $4.53

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

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PCN

Aug 10, 2022

- 22_0177

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC1980EGN#PBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC532A

LTC1980EGN | Regulator/Battery Charger Controller, VIN = 4V to 6.5V, VOUT = 3.3V @ 400mA, BATout 1A Imax

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