MP2703GRP

The MP2703 is a linear charger for 1-cell to 2-cell Li-ion, Li-polymer, LiFePO4, and 2-cell to 6-cell NiMH batteries. The device can sustain a voltage up to 26V. The MP2703 measures the battery voltage (VBATT) and automatically charges the battery in four phases: trickle charge, pre-charge, constant-current (CC) fast charge, and constant-voltage charge. The MP2703 provides a dedicated ISET pin to set the charge current by connecting a resistor between ISET and ground. The device also has a minimum input voltage limit (VIN_LIM) to reduce the charge current when the input power is overloaded. The MP2703 provides robust protections including input over-voltage protection (OVP), battery OVP, charge safety timer, and battery temperature protection, which is compliant with the JEITA standard. The MP2703 integrates a battery diagnostic function. The BATTSNS pin provides an output that is proportional to the real VBATT, which can be directly delivered to an external analog-to-digital converter (ADC) input for VBATT measurements. In addition, an internal dummy load can be controlled to discharge the battery. An external microcontroller (MCU) can detect the battery impedance with the VBATT measurement and discharge function above. The MP2703 also provides two open-drain pins to indicate the input power status and charge status. The ACOK pin can indicate whether the input power is present. The CHG pin can indicate several charging states, including charging, termination, and fault events. The MP2703 offers flexible memory to configure a variety of charge parameters. The MP2703 is available in a QFN-10 (2mmx2.5mm) package.