MP2703 2.4-4.5V, 1A Linear Charger QFN-10

MP2703 2.4-4.5V, 1A Linear Charger QFN-10

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.

Key Specifications

Features

• Up to 26V of Sustainable Voltage
• Up to 1A of Configurable Charge Current via the ISET Pin
• ISET Pin Short-Circuit Protection (SCP)
• Configurable Pre-Charge Current
• Configurable Termination Current Threshold
• One-Time Programmable (OTP) Memory Selection for 3 Minimum Input Voltage Limit (VIN_LIM) Levels
• OTP Selection for Battery Regulation Voltage from 2.4V to 4.5V Per Cell
• 0.5% Battery Regulation Voltage Accuracy
• OTP Selection for 1-Cell or 2-Cell Batteries
• Battery Voltage Monitoring Pin

Typical Application Circuit

Applications

• Headphones
• Wearable Devices

Design Notes

• Charge current accuracy depends on the sense resistor tolerance, so use a 1% or better part and keep its traces Kelvin-connected.
• Wire the NTC input for JEITA profile control if the pack is charged over temperature.
• Set the input current limit to what the adapter can actually deliver; a limit above the adapter rating causes the input rail to collapse mid-charge.
• Termination current and recharge threshold dominate cycle life in shallow-cycling products.

Common Questions