LT1505
PRODUCTIONConstant-Current/Voltage High Efficiency Battery Charger
- Part Models
- 4
- 1ku List Price
- Starting From $8.43
Overview
- Simple Charging of Li-Ion, NiMH and NiCd Batteries
- Very High Efficiency: Up to 97%
- Precision 0.5% Charging Voltage Accuracy
- Preset Battery Voltages: 12.3V, 12.6V, 16.4V and 16.8V
- 5% Charging Current Accuracy
- Charging Current Programmed by Resistor or DAC
- 0.5V Dropout Voltage, Duty Cycle > 99.5%
- AC Adapter Current Limit* Maximizes Charging Rate
- Flag Indicates Li-Ion Charge Completion
- Auto Shutdown with Adapter Removal
- Only 10µA Battery Drain When Idle
- Synchronizable Up to 280kHz
The LT1505 PWM battery charger controller fast charges multiple battery chemistries including lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd) using constant-current or constant-voltage control. Maximum current can be easily programmed by resistors or a DAC. The constant-voltage output can be selected for 3 or 4 series Li-Ion cells with 0.5% accuracy.
A third control loop limits the current drawn from the AC adapter during charging*. This allows simultaneous operation of the equipment and fast battery charging without overloading the AC adapter.
The LT1505 can charge batteries ranging from 2.5V to 20V with dropout voltage as low as 0.5V. Synchronous N-channel FETs switching at 200kHz give high efficiency and allow small inductor size. A diode is not required in series with the battery because the charger automatically enters a 10µA sleep mode when the wall adapter is unplugged. A logic output indicates Li-Ion full charge when current drops to 20% of the programmed value.
The LT1505 is available in a 28-pin SSOP package.
Applications
- Notebook Computers
- Portable Instruments
- Chargers for Li-Ion, NiMH, NiCd and Lead Acid Rechargeable Batteries
Documentation
Data Sheet 1
Application Note 1
Design Note 3
Technical Articles 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 |
|---|---|---|---|
| LT1505CG#PBF | 28-Lead SSOP | ||
| LT1505CG#TRPBF | 28-Lead SSOP | ||
| LT1505CG-1#PBF | 28-Lead SSOP | ||
| LT1505CG-1#TRPBF | 28-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LT1505CG#PBF | PRODUCTION | |
| LT1505CG#TRPBF | PRODUCTION | |
| LT1505CG-1#PBF | PRODUCTION | |
| LT1505CG-1#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 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 |
| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC2954 | RECOMMENDED FOR NEW DESIGNS | Push Button On/Off Controller with µP Interrupt |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LT1505
- LT1505-1
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.
Evaluation Kits
LT1505CG | 4A CC-CV Lithium-Ion Battery Charger, VIN max < 24V, VIN min = Vbat +0.5V (thru-hole caps)
Resources
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