LTC4007-1 - LTC4007-1是4A, High Efficiency, Li-Ion Battery Charger

LTC4007-1是LINEAR凌力尔特公司的一款开关充电器产品，LTC4007-1是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LINEAR元器件型号供参考。

LTC4007-1 - LTC4007-1是4A, High Efficiency, Li-Ion Battery Charger - 开关充电器 - 电源管理 - 凌力尔特

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.

LTC4007LTC4007-1Low 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