中国·必威(bw·西汉姆联)中文官方网站-West Ham Unite

DX-XT2052_EOptocouplers Product Details

General Description

The XT2052 is a constant- current / constant- voltage charger circuit for single cell lithium-ion batteries. The device includes an internal power transistor, does not need external current sense resistor and blocking diode in applications. XT2052 requires minimal external components, and meet the USB bus specification, is very suitable for portable applications in the field.

Thermal modulation circuit can control the internal chip temperature in a safe range when the device power dissipation be relatively large or the ambient temperature be higher. Within a fixed constant charge voltage 4.2V, can also be adjusted by an external resistor.

When the input voltage (AC adapter or USB power supply) power is lost, XT2052 automatically enters a low power sleep mode, then the battery current consumption is less than 0.1μA. Built-in protection circuits against irrigation, when the battery voltage is higher than the input voltage, automatically turn off built-in power MOSFET. Other features include low input voltage latch, automatic recharge, the battery temperature monitoring, and charge status / charge status indication functions. XT2052 uses thermally enhanced 8-pin small outline package ESOP8.

Features

Programmable charge current up to 1A

No MOSFET, sense resistor or blocking diode required

Complete linear charger in small package for single cell lithium-ion batteries

Constant-current/constant-voltage operation with thermal regulation to maximize charge rate without risk of overheating

Charges single cell li-ion batteries directly from USB port

Preset 4.2V charge voltage

Monitor output charge current

Automatic recharge

Charge status output pin

1/10 charge current termination

40µA supply current in shutdown