LT1571
PRODUCTIONConstant-Current/Constant-Voltage Battery Charger with Preset Voltage and Termination Flag
- Part Models
- 6
- 1ku List Price
- Starting From $6.24
Overview
- Fast Charging of Li-Ion, NiMH and NiCd Batteries
- Simple Charge Current Programming Requires Only One Low Cost, 1/32W Resistor
- High Efficiency Charger with Up to 1.5A Charge Current
- Precision 0.6% Internal Voltage Reference
- Preset Battery Voltages: 4.1V, 4.2V, 8.2V, 8.4V
- 500kHz or 200kHz Switching Frequency Minimizes Charger Size
- Low Reverse Battery Drain Current: 5µA
- Flag Indicates Li-Ion Charge Completion
- 5% Typical Charge Current Accuracy
- Low Shutdown Current
- LT1571-1: 200kHz, Adjustable Voltage
- LT1571-2: 200kHz, Fixed 8.2V or 8.4V
- LT1571-5: 500kHz, Fixed 4.1V or 4.2V
The LT1571 PWM battery charger is a simple, efficient solution to fast-charge rechargeable batteries including lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd) using constant-current and/or constant-voltage control. The internal switch is capable of delivering 1.5A DC current (2A peak current). The onboard current sense resistor (0.1Ω) allows simple charge current programming to within 5% accuracy using a low cost external resistor. The constant-voltage output can be selected for 4.1V or 4.2V per cell with 0.6% accuracy.
LT1571 can charge batteries ranging from 1V to 20V. A saturating switch operating at 200kHz (LT1571-1, LT1571-2) or 500kHz (LT1571-5) gives high efficiency and small charger size. A logic output (flag) indicates Li-Ion near full charge when the charge current drops to 20% of the programmed value. The LT1571-1 and LT1571-2 are in a 28-pin fused lead narrow SSOP power package. The LT1571-5 is in a 16-pin fused lead narrow SSOP power package.
Applications
- Cellular Phones, PDAs, Notebook Computers, Portable Instruments
- Cradle Chargers for Li-Ion, NiCd, NiMH and Lead-Acid Rechargeable Batteries
Documentation
Data Sheet 1
Application Note 1
Brochure 1
3rd Party Solutions 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 |
|---|---|---|---|
| LT1571EGN-1#PBF | 28-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1571EGN-1#TRPBF | 28-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1571EGN-2#PBF | 28-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1571EGN-2#TRPBF | 28-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1571EGN-5#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LT1571EGN-5#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL |
||
| LT1571EGN-1#PBF | PRODUCTION | |
| LT1571EGN-1#TRPBF | PRODUCTION | |
| LT1571EGN-2#PBF | PRODUCTION | |
| LT1571EGN-2#TRPBF | PRODUCTION | |
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LT1571EGN-5#PBF | PRODUCTION | |
| LT1571EGN-5#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LT1571EGN-5#PBF | PRODUCTION | |
| LT1571EGN-5#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LT1571EGN-5#PBF | PRODUCTION | |
| LT1571EGN-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Monitors & Fuel Gauges 1 | ||
| LTC2942-1 | Obsolete | 1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement |
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC2953 | RECOMMENDED FOR NEW DESIGNS | Push Button On/Off Controller with Voltage Monitoring |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
Evaluation Kits
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