LTC4075HVX数据手册集成电路（IC）的电池充电器规格书PDF

描述 Description

The LTC4075HVX is a standalone linear charger that is capable of charging a single-cell Li-Ion/Polymer 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. The LTC4075HVX features a maximum 22V rating for both wall adapter and USB inputs although charging stops if the selected power source exceeds the overvoltage limit. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. The LTC4075HVX terminates the charge cycle when the charge current drops below the programmed termination threshold after the final float voltage is reached.

Other features include automatic recharge, undervoltage lockout, charge status outputs, and “power present” status outputs to indicate the presence of wall adapter or USB power. No trickle charge allows full current from the charger when a load is connected directly to the battery.

Trickle Charge Vin Abs Max LTC4075 Yes 10V LTC4075X No 10V LTC4075HVX No 22V Applications

Cellular Telephones Handheld Computers Portable MP3 Players Digital Cameras

特性 Features

• 22V Maximum Voltage for Wall Adapter and USB Inputs

• Charge 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

• Overvoltage Lockout for Wall Adapter and USB Inputs

• No External MOSFET, Sense Resistor or Blocking Diode Needed

• Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*

• Preset Charge Voltage with ±0.35% Accuracy

• Programmable Charge Current Termination

• 40µA USB Suspend Current in Shutdown

• Independent “Power Present” Status Outputs

• Charge Status Output

• Automatic Recharge

• Available in a Thermally Enhanced, Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package

简介

LTC4075HVX属于集成电路（IC）的电池充电器。由制造生产的LTC4075HVX电池充电器电池充电器 PMIC（电源管理集成电路）是元器件级产品系列，用于在电子设备中实现电池充电控制和充电管理功能。这些器件主要根据电池化学及其设计用于的电池数量来分类，可提供电化学电池和超级电容器安全充电所必需的电流或电压调节和监视功能。