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

簡介

LTC4075HVX屬于集成電路（IC）的電池充電器。由制造生產(chǎn)的LTC4075HVX電池充電器電池充電器 PMIC（電源管理集成電路）是元器件級產(chǎn)品系列，用于在電子設(shè)備中實現(xiàn)電池充電控制和充電管理功能。這些器件主要根據(jù)電池化學及其設(shè)計用于的電池數(shù)量來分類，可提供電化學電池和超級電容器安全充電所必需的電流或電壓調(diào)節(jié)和監(jiān)視功能。