LTC4077 - LTC4077是Dual Input Standalone Battery Charger

LTC4077是LINEAR凌力尔特公司的一款线性充电器产品，LTC4077是LTC4077是Dual Input Standalone Battery Charger，本站介绍了LTC4077的封装应用图解、特点和优点、功能等，并给出了与LTC4077相关的LINEAR元器件型号供参考。

LTC4077 - LTC4077是Dual Input Standalone Battery Charger - 线性充电器 - 电源管理 - 凌力尔特

LTC4077 - Dual Input Standalone Battery Charger

LTC4077 - Dual Input Standalone Battery Charger - Linear Technology（凌力尔特）

功能描述

The LTC4077 is a standalone linear charger that is capable of charging a single-cell Li-Ion battery from both wall adapter and USB inputs. The charger can detect power at the inputs and automatically select the appropriate power source for charging.

No external sense resistor or blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The ?oat voltage is ?xed at 4.2V and the charge current is programmed with an external resistor. The LTC4077 terminates the charge cycle when the charge current drops below the termination threshold after the ?nal ?oat voltage is reached. The LTC4077 can be put into shutdown mode reducing the DCIN supply current to 20μA, the USBIN supply current to 10μA, and the battery drain current to less than 2μA even with power applied to both inputs.

Other features include automatic recharge, undervoltage lockout, charge status output, power present status output to indicate the presence of wall adapter or USB power and high power/low power adjustable mode for USB compatible applications.

特点

Charges Single-Cell Li-Ion Batteries from Wall

Adapter and USB Inputs

Automatic Input Power Detection and Selection

Charge Current Programmable up to 950mA from Wall Adapter Input

C/10 Charge Current Termination

Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*

Preset Charge Voltage with ±0.6% Accuracy

18μA USB Suspend Current in Shutdown

Power Present Status Output

Charge Status Output

Automatic Recharge