Power Management Battery Management Battery Charger IC Switching Chargers
Power Management Battery Management Battery Charger IC Buck/Boost Battery Chargers

LTM8062 - 32VIN, 2A uModule Power Tracking Battery Charger
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LT1512 - SEPIC Constant-Current/Constant-Voltage Battery Charger

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


*Maximum Input Voltage = 40V – VBAT

Typical Application

LT1512 Typical Application
LT1512 Typical Application

Description

The LT1512 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. In addition, these topologies allow charging even when the input voltage is lower than the battery voltage.

Maximum switch current on the LT1512 is 1.5A. This allows battery charging currents up to 1A for a single lithium-ion cell. Accuracy of 1% in constant-voltage mode is perfect for lithium battery applications. Charging current can be easily programmed for all battery types.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

SO-8

LT1512 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1512CGN SSOP 16 C $5.25 $4.25 View
LT1512CGN#PBF SSOP 16 C $5.25 $4.25 View
LT1512CGN#TR SSOP 16 C $4.31 View
LT1512CGN#TRPBF SSOP 16 C $4.31 View
LT1512CN8 PDIP 8 C $4.50 $3.60 View
LT1512CN8#PBF PDIP 8 C $4.50 $3.60 View
LT1512CS8 SO 8 C $4.65 $3.75 View
LT1512CS8#PBF SO 8 C $4.65 $3.75 View
LT1512CS8#TR SO 8 C $3.81 View
LT1512CS8#TRPBF SO 8 C $3.81 View
LT1512IGN SSOP 16 I $5.90 $4.80 View
LT1512IGN#PBF SSOP 16 I $5.90 $4.80 View
LT1512IGN#TR SSOP 16 I $4.86 View
LT1512IGN#TRPBF SSOP 16 I $4.86 View
LT1512IN8 PDIP 8 I $5.15 $4.15 View
LT1512IN8#PBF PDIP 8 I $5.15 $4.15 View
LT1512IS8 SO 8 I $5.35 $4.25 View
LT1512IS8#PBF SO 8 I $5.35 $4.25 View
LT1512IS8#TR SO 8 I $4.31 View
LT1512IS8#TRPBF SO 8 I $4.31 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC099A LT1512 | 0.4A LI-ION SEPIC BATTERY CHARGER (dual or single) $125.00
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Applications

  • Battery Charging of NiCd, NiMH, Lead-Acid or Lithium Rechargeable Cells
  • Precision Current Limited Power Supply
  • Constant-Voltage/Constant-Current Supply
  • Transducer Excitation

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Related models available in LTspice IV
LT1512

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