GENERAL DESCRIPTION
LN2051 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 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. Charge current set by an external resistor. When the input voltage (AC adapter or USB power supply) power is lost, LN2051 automatically enters a low power sleep mode, then the battery current consumption is less than 3μA. 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.LN2051 uses thermally enhanced 8-pin small outline package SOP-8 or MSOP-8.
