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IC LT1512LS8 30V 1.5A 500kHz Current Mode Switching Regulator Constant-Current

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  • Jameco Part no.: 2290687
  • Manufacturer: Analog Devices
  • Manufacturer no.: LT1512LS8#TRPBF
  • HTS code: 8541500040
    • Electronics Parts Locator
  • This item is discontinued and is not
    recommended for new designs.
# of units Price
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SEPIC Constant-Current and Constant Voltage Battery Charger IC

The LT®1512 is a 500kHz current mode switching regulator specially configured to create a constant-current/constant-voltage battery charger. In addition to the usual voltage feedback node, it has a current sense feedback circuit for accurately controlling output current of a flyback or SEPIC (Single-Ended Primary Inductance Converter) topology charger. These topologies allow the current sense circuit to be ground referred and completely separated from the battery itself, simplifying battery switching and system grounding problems.

Maximum switch current on the LT1512 is 1.5A. This allows battery charging currents up to 1A for a single lithium-ion cell.

Features

  • Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage
  • Charges Any Number of Cells Up to 30V*
  • 1% Voltage Accuracy for Rechargeable Lithium Batteries
  • 500kHz Switching Frequency Minimizes Inductor Size
  • 100mV Current Sense Voltage for High Efficiency
  • Battery Can Be Directly Grounded
  • Charging Current Easily Programmable or Shut Down

Applications

  • Battery Charging of NiCd, NiMH, Lead-Acid or Lithium Rechargeable Cells
  • Precision Current Limited Power Supply
  • Constant-Voltage/Constant-Current Supply
  • Transducer Excitation
*Maximum Input Voltage = 40V - VBAT

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Specification Value
FamilyLT1512
Product TypeBattery Charger
Battery TypeNiCd, NiMH, Lead-Acid, Lithium
Output Current1500mA
Output Voltage30V
Minimum Operating Supply Voltage2.4V
Maximum Operating Supply Voltage30V


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