MP26101 – 2A, 24V INPUT, 1.1MHz 1- OR 2- CELL SWITCHING LI-ION BATTERY CHARGER

MP26101 Rev. 1.0

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9/7/2011

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as close as possible to the VIN and GND pins.

Place the external feedback resistors next to the

FB pin. Keep the switching node SW short and

away from the feedback network.

USB Input Application

Use the typical application circuit in Figure 6 for

USB charging. Use one PMOS instead of the

block diode D1 to limit the voltage drop, and to

realize smaller minimum input charging to a

single-cell battery. The charge current is set to be

requirements and to realize fast charging.

Figure 7 is the typical charging curve. The charge

current cannot remain constant at the setting

value during the operation at the constant current

charging mode: It drops at the device’s maximum

duty. Use a lower charge current to extend the

constant current charge duration. This feature

makes the MP26101 suitable for USB charging.