LTC4075HVX High Voltage Dual Input

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.

产品特点 Features

22V Maximum Voltage for Wall Adapter andUSB 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 andUSB 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

应用

Cellular Telephones
Handheld Computers
Portable MP3 Players
Digital Cameras

典型应用图

参数

LTC4075HVX 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4075EDD	DFN	10	E	$2.67	$1.88
LTC4075EDD#PBF	DFN	10	E	$2.67	$1.88
LTC4075EDD#TR	DFN	10	E		$1.98
LTC4075EDD#TRPBF	DFN	10	E		$1.98
LTC4075HVXEDD#PBF	DFN	10	E	$2.86	$2.00
LTC4075HVXEDD#TRPBF	DFN	10	E		$2.06

LTC4075HVX 数据手册及相关资料下载

数据手册(英文) : LTC4075HVX - High Voltage Dual Input Li-Ion/Polymer Battery Charger.PDF
可靠性数据 : R540 Reliability Data .PDF
产品选型卡 : I2C Battery Gas Gauges.PDF
产品选型卡 : Energy Harvesting Portfolio.PDF