Smart Fast Charging Power Bank Controller

  The Smart Fast Charging Power Bank Controller is a high-performance power management solution integrating multi-protocol fast charging, bidirectional energy conversion, and visual interaction. Utilizing a highly integrated main control chip, this solution supports both input and output via USB-A and Type-C dual ports, featuring precise power metering and multiple safety protection mechanisms. Coupled with a customized OLED display, it provides real-time visualization of voltage, current, power, and temperature status, offering users a transparent and safe charging experience. With its compact circuit layout and high conversion efficiency, this solution is ideal for high-capacity, high-performance power bank products.

Dual-Port Fast Charging Architecture:

• Type-C Port: Supports bidirectional charging and discharging. As an input, it supports rapid recharging at specifications of 5V/3.0A and above; as an output, it supports mainstream fast charging protocols such as PD/QC, with a maximum output current of up to 3.0A.
• USB-A Port: Supports unidirectional high-current output, compatible with standard 5V/2.4A charging and various proprietary manufacturer protocols, meeting the needs of simultaneous multi-device charging.

Efficient Power Conversion:

• Synchronous Rectification Technology: The board features a high-power toroidal inductor (as shown in the PCB image) paired with low internal resistance MOSFETs to construct a highly efficient Buck-Boost topology, significantly reducing thermal loss during charge/discharge cycles.
• Wide Voltage Input: Compatible with single or multi-cell lithium battery packs, supporting a wide range of input voltages.

This solution abandons traditional LED indicators in favor of a customized segment-code OLED screen, providing rich data feedback:

Interface Information Display:

• Large Battery Percentage: The left side of the screen displays the current remaining battery percentage in large three-digit numbers, making it intuitive and eye-catching.
• Input Source Identification: The top section dynamically displays the currently active input channel.
• Real-Time Power Monitoring: The right area refreshes current voltage and amperage values in real-time, making charging speed visible.
• Status Icons: Includes percentage symbols and anomaly status indicators.

Intelligent Thermal Control Alarm:

• Overheat Protection Alert: When the system detects that the internal temperature exceeds the safety threshold, the specific area of the screen immediately displays “OVER HEAT” accompanied by a flashing thermometer icon, while simultaneously forcing a reduction in output power or cutting off output to ensure safety.

Compact PCB Layout:

• Power Component Heat Dissipation: Key heat-generating components are logically arranged with reserved space for heat dissipation.
• Reinforced Interfaces: The Type-C female connector uses a hybrid SMT+DIP package or high-strength SMT packaging, offering strong resistance to plug/unplug wear.

Comprehensive Safety Protection:

• Over-Temperature Protection (OTP): Built-in NTC thermistor detection points monitor cell and MOSFET temperatures in real-time.
• Short-Circuit Protection (SCP): Hardware-level short-circuit detection with microsecond-level response time.
• Over-Current/Over-Voltage Protection: Precisely limits output current and voltage to prevent damage to downstream load devices.
• Electrostatic Discharge (ESD) Protection: ESD protection devices are designed at data interfaces to prevent chip damage from human body static electricity.

Protocol Handshake Logic:

• Upon connecting a device, the main control chip automatically identifies the load type, completing the fast charging protocol handshake and negotiation within milliseconds to switch to the optimal output voltage level.

Low-Power Standby:

• When no load is detected or charging is complete, the system automatically enters a microampere-level sleep mode, turning off the OLED display and power stage output to minimize self-consumption and extend storage time.

UI Dynamic Refresh:

• Screen data refresh rate is optimized so that current value transitions are smooth and natural without lag, enhancing the premium feel of the product.