PCBA Consumer Electronics Prime Power Bank SMT Printed Circuit Board Assembly

PCBA  Images

About TECircuit

Found: TECircuit has been operating since 2004.

Location: An electronics manufacturing service(EMS) provider located in Shenzhen China.

Item: Customizable EMS PCB, offers a full range of one-stop shop services.

Service: Printed Circuit Board (PCB)and Printed Circuit Board Assembly(PCBA), Flexible Printed Circuit Board(FPC), Components Sourcing, Box-Building, Testing.

Quality Assurance: UL,ISO 9001, ISO 14001, ISO 13485, ITAF 16949 andcomplied with ROHS and REACH.

Factory Pictures:
Company's own plant : 50,000 sqm; Employees : 930+; Monthly production capacity : 100,000 m2

PCBA  Applications

• Mobile Device Charging and Emergency Power: The PCBA manages the safe and efficient transfer of stored energy from lithium-ion batteries to smartphones, tablets, and other USB-powered devices, providing critical backup power during travel, outdoor activities, or power outages.

• High-Speed and Multi-Device Charging Hub: Enables simultaneous charging of multiple devices with varying power requirements (phones, watches, earbuds) by intelligently distributing available power across multiple output ports while supporting fast-charging protocols like USB Power Delivery (PD) and Quick Charge (QC).

• Laptop and High-Power Device Support: Advanced PCBA designs support higher voltage output (e.g., 20V via USB-C PD) to charge laptops, portable monitors, and even some cameras, transforming the power bank into a versatile power source for a wider range of electronics.

• Travel and International Use: Integrates circuitry that supports universal input voltage (100-240V AC) for recharging the power bank itself, making it compatible with electrical systems worldwide. Some designs include pass-through charging to recharge the power bank and connected devices simultaneously.

• IoT and Wearable Device Maintenance: Provides low-current charging modes specifically designed for small devices like smartwatches, fitness trackers, and wireless earbuds, preventing damage from higher currents intended for larger devices.

• Outdoor and Recreational Power Supply: Serves as a portable energy source for camping, hiking, or remote work, often integrating with solar panels for recharging and featuring ruggedized designs that withstand environmental exposure.

• Backup Power for Medical and Essential Devices: Used to keep essential low-power medical devices (like portable oxygen concentrators, CPAP machines, or glucose monitors) operational during travel or power interruptions, with PCBA features ensuring stable, reliable power delivery.

PCBA Features 

1. Battery Management System (BMS) and Protection Circuitry: The core of the PCBA is a sophisticated BMS that monitors individual cell voltages, balances cell charge (for multi-cell packs), and provides multiple layers of protection against over-charge, over-discharge, over-current, and short circuits, ensuring safe battery operation.

2. High-Efficiency Power Conversion and Voltage Regulation: Integrates high-frequency switching regulators (buck-boost converters) that efficiently step up or step down the battery voltage to the required output levels (5V, 9V, 12V, 15V, 20V) with conversion efficiencies often exceeding 90%, minimizing energy loss as heat.

3. Intelligent Charging Protocol Controller: Features a dedicated microcontroller or protocol IC that negotiates with connected devices to determine and deliver the optimal charging voltage and current. It supports multiple fast-charging standards including USB PD 3.0, Qualcomm Quick Charge, Samsung AFC, and Apple charging protocols.

4. Multi-Port Power Management and Load Detection: Includes circuitry that dynamically allocates power between multiple output ports based on connected device requests. It can detect when a device is connected or disconnected and adjust power distribution accordingly without interrupting charging on other ports.

5. Input Charging Controller with Pass-Through Support: Manages the recharging of the power bank's internal batteries from various sources (AC adapter, car charger, solar panel). Advanced designs support pass-through charging, allowing the power bank to charge both itself and connected devices simultaneously.

6. Digital Display Driver and User Interface: Incorporates drivers for LED indicators or small LCD/LED digital displays that show real-time battery capacity remaining, output voltage/current, estimated charging time, and port status, providing users with clear operational feedback.

7. Advanced Thermal Management and Temperature Monitoring: Employs temperature sensors strategically placed on the PCBA to monitor heat generation during high-power charging/discharging cycles. The control logic can automatically reduce power output or initiate protection shutdown if safe temperature thresholds are exceeded.

8. Low Quiescent Current and Auto-On/Off Detection: Features ultra-low-power standby modes that draw minimal current from the battery when not in use. Load detection circuitry automatically activates the output when a device is connected and powers down when devices are disconnected, preserving stored energy.

FAQ

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