LTC1732-4.2 - LTC1732-4.2是Lithium-Ion Linear Battery Charger Controller
LTC1732-4.2是Linear公司的一款线性充电器产品，LTC1732-4.2是Lithium-Ion Linear Battery Charger Controller，本站介绍了LTC1732-4.2的封装应用图解、特点和优点、功能等，并给出了与LTC1732-4.2相关的凌力尔特元器件型号供参考。
LTC1732-4.2 - Lithium-Ion Linear Battery Charger Controller
LTC1732-4 & 4.2 - Lithium-Ion Linear Battery Charger Controller - Linear Technology（凌力尔特）
功能描述
The LTC1732 is a complete constant-current/constant-voltage linear charge controller for lithium-ion (Li-Ion) batteries. Nickel-cadmium (NiCd) and nickel metal-hydride (NiMH) batteries can also be charged with constant current using external termination. Charge current can be programmed with 7% (max) accuracy using external sense and program resistors. An internal resistor divider and precision reference set the final float voltage with 1% accuracy. The SEL pin allows users to charge either 4.1V or 4.2V cells.
When the input supply is removed, the LTC1732 automatically enters a low current sleep mode, dropping the battery drain current to 7μA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.457V.
The LTC1732 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In addition, if the battery remains connected to the charger and the cell voltage drops below 3.8V for the LTC1732-4 or below 4.05V for the LTC1732-4.2, a new charge cycle will begin.
The LTC1732 is available in the 10-pin MSOP package
特点
Complete Linear Charger Controller for 1-Cell Lithium-Ion Batteries Preset Charge Voltage with 1% Accuracy 4.5V to 12V Input Voltage Range Programmable Charge Current C/10 Charge Current Detection Output Programmable Charge Termination Timer Small, Thin 10-Pin MSOP Package Select Pin to Charge Either 4.1V or 4.2V Cells (LTC1732-4) Automatic Sleep Mode When Input Supply is Removed (Only 7μA Battery Drain) Automatic Trickle Charge of Low Voltage Cells Programmable for Constant-Current-Only Mode Battery Insertion Detect Input Supply (Wall Adapter) Detection Output 4.05V Recharge Threshold for 4.2V Cells (LTC1732-4.2) 3.8V Recharge Threshold for 4.1V or 4.2V Cells (LTC1732-4)应用
Cellular Phones Handheld Computers Charging Docks and Cradles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) |
| LTC1732EMS-4 | MS-10 | E | $2.52 | $2.15 |
| LTC1732EMS-4.2 | MS-10 | E | $2.52 | $2.15 |
| LTC1732EMS-4.2#PBF | MS-10 | E | $2.52 | $2.15 |
| LTC1732EMS-4.2#TR | MS-10 | E | | $2.21 |
| LTC1732EMS-4.2#TRPBF | MS-10 | E | | $2.21 |
| LTC1732EMS-4#PBF | MS-10 | E | $2.52 | $2.15 |
| LTC1732EMS-4#TR | MS-10 | E | | $2.21 |
| LTC1732EMS-4#TRPBF | MS-10 | E | | $2.21 |
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