LT1512
PRODUCTIONSEPIC Constant-Current/Constant-Voltage Battery Charger
- Part Models
- 10
- 1ku List Price
- Starting From $5.60
Overview
- 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
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.
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
Documentation
Data Sheet 1
Application Note 2
Design Note 1
Technical Articles 1
Spec Notice 1
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1512CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1512CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1512CN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1512CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1512CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1512IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1512IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1512IN8#PBF | 8-Lead PDIP (Narrow 0.3 Inch) | ||
| LT1512IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1512IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LT1512CGN#PBF | PRODUCTION | |
| LT1512CGN#TRPBF | PRODUCTION | |
| LT1512IGN#PBF | PRODUCTION | |
| LT1512IGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LT1512CGN#PBF | PRODUCTION | |
| LT1512CGN#TRPBF | PRODUCTION | |
| LT1512IGN#PBF | PRODUCTION | |
| LT1512IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LT1512CGN#PBF | PRODUCTION | |
| LT1512CGN#TRPBF | PRODUCTION | |
| LT1512IGN#PBF | PRODUCTION | |
| LT1512IGN#TRPBF | PRODUCTION | |
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LT1512CN8#PBF | PRODUCTION | |
| LT1512IN8#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1512CN8#PBF | PRODUCTION | |
| LT1512IN8#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LT1512CN8#PBF | PRODUCTION | |
| LT1512IN8#PBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1512CS8#PBF | PRODUCTION | |
| LT1512CS8#TRPBF | PRODUCTION | |
| LT1512IS8#PBF | PRODUCTION | |
| LT1512IS8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1512CS8#PBF | PRODUCTION | |
| LT1512CS8#TRPBF | PRODUCTION | |
| LT1512IS8#PBF | PRODUCTION | |
| LT1512IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 2 | ||
| LTC4020 | RECOMMENDED FOR NEW DESIGNS | 55V Buck-Boost Multi-Chemistry Battery Charger |
| LTM8062 | RECOMMENDED FOR NEW DESIGNS | 32VIN, 2A μModule (Power Module) Power Tracking Battery Charger |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC2956 | RECOMMENDED FOR NEW DESIGNS | Wake-Up Timer with Pushbutton Control |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4020 | RECOMMENDED FOR NEW DESIGNS | 55V Buck-Boost Multi-Chemistry Battery Charger |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1512
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.