LT1505 - LT1505是Constant-Current/Voltage High Efficiency Battery Charger
LT1505是Linear公司的一款开关充电器产品，LT1505是Constant-Current/Voltage High Efficiency Battery Charger，本站介绍了LT1505的封装应用图解、特点和优点、功能等，并给出了与LT1505相关的凌力尔特元器件型号供参考。
LT1505 - Constant-Current/Voltage High Efficiency Battery Charger
LT1505 - Constant-Current/Voltage High Efficiency Battery Charger - Linear Technology（凌力尔特）
功能描述
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.
特点
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应用
Notebook Computers Portable Instruments Chargers for Li-Ion, NiMH, NiCd and Lead Acid Rechargeable Batteries以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
| LT1505CG | SSOP-28 | C | $5.65 | $4.80 |
| LT1505CG-1 | SSOP-28 | C | $5.15 | $4.60 |
| LT1505CG-1#PBF | SSOP-28 | C | $5.15 | $4.60 |
| LT1505CG-1#TR | SSOP-28 | C | | $4.70 |
| LT1505CG-1#TRPBF | SSOP-28 | C | | $4.70 |
| LT1505CG#PBF | SSOP-28 | C | $5.65 | $4.80 |
| LT1505CG#TR | SSOP-28 | C | | $4.90 |
| LT1505CG#TRPBF | SSOP-28 | C | | $4.90 |
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