LTC4007-1 - LTC4007-1是4A, High Efficiency, Li-Ion Battery Charger
LTC4007-1是Linear公司的一款开关充电器产品，LTC4007-1是4A, High Efficiency, Li-Ion Battery Charger，本站介绍了LTC4007-1的封装应用图解、特点和优点、功能等，并给出了与LTC4007-1相关的凌力尔特元器件型号供参考。
LTC4007-1 - 4A, High Efficiency, Li-Ion Battery Charger
LTC4007-1 - 4A, High Efficiency, Li-Ion Battery Charger - Linear Technology（凌力尔特）
功能描述
The LTC4007-1 is a constant-current/constant-voltage charger controller for 3- or 4-cell lithium-ion batteries. The PWM controller uses a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. Charging current is programmable to ±4% accuracy using a programming resistor. Charging current can also be monitored as a voltage across the programming resistor.
The output float voltage is pin programmed for cell count (3 cells or 4 cells) and chemistry (4.2V/4.1V). A timer, programmed by an external resistor, sets the total charge time.
The LTC4007-1 includes a thermistor input, which suspends charging if an unsafe temperature condition is detected. If the cell voltage is less than 3.25V, a low-battery indicator asserts and can be used to program a trickle charge current to safely charge depleted batteries. The FAULT pin is also asserted and charging terminates if the low-battery condition persists for more than 1/4 of the total charge time.
| LTC4007 | LTC4007-1 | Low battery threshold 4.2V cell2.5V3.25VLow battery threshold 4.1V cell2.44V3.173VRestartEnabledDisabledPackageSSOP-24QFN-24
特点
Charger Controller for 3- or 4-Cell Lithium-Ion Batteries High Conversion Efficiency: Up to 96% Output Currents Exceeding 4A ±0.8% Charging Voltage Accuracy Built-In Charge Termination for Li-Ion Batteries AC Adapter Current Limiting Maximizes Charge Rate* Thermistor Input for Temperature Qualified Charging Wide Input Voltage Range: 6V to 28V 0.5V Dropout Voltage; Maximum Duty Cycle: 98% Programmable Charge Current: ±4% Accuracy Indicator Outputs for Charging, C/10 Current Detection, AC Adapter Present, Low Battery, Input Current Limiting and Faults Charging Current Monitor Output Available in a 24-Pin 4mm × 5mm QFN Package应用
Notebook Computers Portable Instruments Battery-Backup Systems Li-Ion Chargers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) |
| LTC4007EUFD-1 | 4x5 QFN-24 | E | $5.43 | $3.80 |
| LTC4007EUFD-1#PBF | 4x5 QFN-24 | E | $5.43 | $3.80 |
| LTC4007EUFD-1#TR | 4x5 QFN-24 | E | | $3.90 |
| LTC4007EUFD-1#TRPBF | 4x5 QFN-24 | E | | $3.90 |
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