NVDC Buck Charger Use Case: Point-of-Sale (POS) Terminals

USE CASE

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This use case examines the application of the MP2722 narrow-voltage DC (NVDC) charger in point-of-sale (POS) terminals.

The MP2722 battery charger IC is a 5A, switch-mode battery management device for single-cell Li-ion or Li-polymer batteries that provides protections — including under-voltage protection (UVP), over-voltage protection (OVP), and thermal regulation — to minimize the likelihood of battery failure in POS terminals.

POS terminals (including portable POS and mobile POS) are electronic devices that deliver payment transactions in fast-paced settings like retail stores, healthcare, restaurants, and transportation. Compared to traditional cash registers, POS terminals provide improved security and efficiency, in addition to data collection. High reliability and quick processing speeds for payment transactions are crucial to manage checkout times as well as customer satisfaction. Battery failure in POS terminals is a potential disruption that leads to productivity loss, inconveniences customers, and in the worst-case scenario, lost business.

The MP2722 battery charger IC is a 5A, switch-mode battery management device for single-cell Li-ion or Li-polymer batteries that provides protections — including under-voltage protection (UVP), over-voltage protection (OVP), and thermal regulation — to minimize the likelihood of battery failure in POS terminals. The device’s NVDC power management structure also provides a low-impedance power path that offers advantages across charging efficiency, battery charging time, and battery life during discharging.

Additional features include:

• USB Type-C 1.3 Compliant
• Fully Integrated CC Controller with Dual-Role Power (DRP) Mode and Autonomous or Manual Mode
• Try.SNK and Try.SRC Mode Support
• Supports USB BC1.2 and Non-Standard Adapters
• 26V Sustainable Input Voltage (V_IN)
• Configurable 80mA to 5A Charge Current (I_CC) via the I²C
• Configurable 100mA to 3.2A Input Current Limit (I_{IN_LIM}) via the I²C
• Minimum V_IN Loop for Maximum Adapter Power Tracking
• Comprehensive Safety Features:
• Fully Customizable JEITA Profile
• Additional Negative Temperature Coefficient (NTC) Thermistor Input
• Configurable Die Temperature Regulation from 60°C to 120°C
• Complete Charge and Pre-Charge Safety Timers
• Watchdog Safety Timer
• Lockable Registers for Charging Parameters
• Configurable 750kHz to 1.5MHz Switching Frequency (f_SW)
• Integrated 15mΩ Low On Resistance (R_DS(ON)) Battery MOSFET with Shipping and Reset Modes
• Ultra-Low 8.5μA Battery Discharge Current in Shipping Mode
• Down to 30mA Termination Current Settings for Wearable Applications
• I²C Port for Flexible System Parameter Setting and Status Reporting
• Configurable Boost Converter for Source Mode and USB On-The-Go (OTG):
• Configurable Output Current Limit Loop Up to 3A
• Output Over-Current Protection (OCP)
• Ability to Power into Large Capacitive Loads Up to 2mF
• Configurable 5V to 5.35V Output Voltage
• Accuracy:
• ±0.5% Battery Regulation Voltage (V_{BATT_REG})
• ±5% I_CC
• ±5% I_{IN_LIM}
• Remote Battery Sensing for Fast Charge
• ±2% Output Regulation in Boost Mode
• Available in a Small QFN-22 (2.5mmx3.5mm) Package

Learn more about MPS’s easy-to-use, configurable battery management solutions.