NVDC Buck Charger Use Case: Portable Digital Cameras

USE CASE

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This use case examines the application of the MP2722 in portable digital cameras.

The MP2722 switch-mode battery management device integrates USB Type-C dual-role power (DRP) mode detection, which achieves faster charging and improved functionality for portable digital cameras, including universal charging, bidirectional charging/discharging, and the ability to power external devices.

The limited battery and runtime of portable digital cameras are disruptive to the user experience, necessitating bulky external chargers or frequent recharging. As the power demands of portable digital cameras continue to grow, designers must develop battery management systems that can provide a reliable power source for extended usage without compromising efficiency and the compact form factor. Battery issues can also result in overheating, which may potentially damage internal components and corrupt the memory card.

The MP2722 switch-mode battery management device integrates USB Type-C dual-role power (DRP) mode detection, which achieves faster charging and improved functionality for portable digital cameras, including universal charging, bidirectional charging/discharging, and the ability to power external devices. The device’s highly integrated narrow-voltage DC (NVDC) power management structure optimizes charging efficiency and reduces battery charging time. In addition, the MP2722’s configurable output current (I_OUT) limit loop up to 3A prevents excessive current draw and helps maintain a stable power supply. The MP2722 is available in a small QFN-22 (2.5mmx3.5mm) package.

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 Serial Interface
• Configurable 100mA to 3.2A Input Current Limit (I_{IN_LIM}) via the Serial Interface
• 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 R_DS(ON) Battery MOSFET with Shipping Mode and Reset Mode
• Ultra-Low 8.5μA Battery Discharge Current in Shipping Mode
• Down to 30mA Termination Current Settings for Wearable Applications
• Serial Interface Port for Flexible System Parameter Setting and Status Reporting
• Configurable Boost Converter for Source Mode and USB On-The-Go (OTG):
• Output Over-Current Protection (OCP)
• Ability to Power Large Capacitive Loads Up to 2mF
• Configurable 5V to 5.35V Output Voltage (V_OUT)
• Accuracy:
• ±0.5% Battery Float Voltage Regulation (V_{BATT_REG})
• ±5% I_CC
• ±5% I_{IN_LIM}
• Remote Battery Sensing for Fast Charging
• ±2% Output Regulation in Boost Mode

For more details, check out MPS’s robust selection of single-cell charger ICs.