LTC4071
Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect
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Overview
Features and Benefits
- Charger Plus Pack Protection in One IC
- Low Operating Current (550nA)
- Near Zero Current (<0.1nA) Low Battery Disconnect Function to Protect Batteries from Over-Discharge
- Pin Selectable Low Battery Disconnect Level: 2.7V or 3.2V
- 1% Float Voltage Accuracy Over Temperature
- 50mA Maximum Internal Shunt Current
- Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V
- Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/Polymer Protection
- Suitable for Intermittent, Continuous and Very Low Power Charging Sources
- High Battery Status Output
- Thermally Enhanced, Low Profile (0.75mm) 8-lead (2mm × 3mm) DFN and MSOP Packages
Product Details
The LTC4071 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. A near-zero current low battery latching disconnect function protects even the lowest capacity batteries from deep discharge and potentially irreparable damage. The 550nA to 50mA operating current makes charging possible from previously unusable sources. With its low operating current the LTC4071 is well suited to charge low capacity Li-Ion or thin film batteries in energy harvesting applications. The unique architecture of the LTC4071 allows for an extremely simple battery charger solution, requiring just one external resistor.
The LTC4071 offers a pin selectable float voltage with ±1% accuracy. The integrated thermal battery qualifier extends battery lifetime and improves reliability by automatically reducing the battery float voltage at NTC thermistor temperatures above 40°C. The LTC4071 also provides two pin selectable low battery disconnect levels and a high battery status output.
The device is offered in two thermally enhanced packages, a compact low profile (0.75mm) 8-lead (2mm × 3mm) DFN and an 8-lead MSOP package.
Applications
- Low Capacity, Li-Ion/Polymer Battery Back-Up
- Thin Film Batteries
- Energy Scavenging/Harvesting
- Solar Power Systems with Back-Up
- Memory Back-Up
- Embedded Automotive
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R540 Reliability Data3/26/2018PDF23 K
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DC1702A - Demo Manual10/25/2010PDF332K
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Practical Ambient Energy Harvesting for WSNs9/5/2017PDF1M
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Practical Ambient Energy Harvesting for WSNs4/5/2017PDF1M
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LTC4071 - Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect10/3/2011PDF1M
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Green Buildings Get a Boost: Wireless Sensor Nodes as a Key Application for Energy Harvesting7/1/2020 Thought Leadership
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True Grid Independence: Robust Energy Harvesting System for Wireless Sensors Uses Piezoelectric Energy Harvesting Power Supply and Li-Poly Batteries with Shunt Charger10/1/2010 LT Journal
Tools & Simulations
LTspice
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Models for the following parts are available in LTspice:
LTC4071
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC4071EDDB#TRMPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 2mm w/ EP) | |
| LTC4071EDDB#TRPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 2mm w/ EP) | |
| LTC4071EMS8E#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4071EMS8E#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4071IDDB#TRMPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 2mm w/ EP) | |
| LTC4071IDDB#TRPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 2mm w/ EP) | |
| LTC4071IMS8E#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4071IMS8E#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| Wafer Fabrication Data | R540 Reliability Data |
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Sample & Buy
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Lead Times
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.