Power Bank Charging Circuit Module (T6845-C V1.0 - 5V 1A Step-Up Boost & Charger)
Product Description
The T6845-C Power Bank Module is an all-in-one step-up boost converter and single-cell Lithium-ion/LiPo battery charger board. Designed to build or repair custom power banks, portable electronics, and USB-powered projects, this compact module efficiently steps up a 3.7V lithium battery voltage to a stable 5V DC output via a standard USB Type-A port.
It features an onboard Micro-USB port for charging the connected battery, integrated LED status indicators for charging status, and built-in protection circuitry against overcharging, over-discharging, and over-current. Its ultra-small footprint makes it ideal for custom portable power supplies, DIY electronics, and emergency power backup projects.
Key Features
- Dual Functionality: Combines a 3.7V lithium battery charging management circuit with a 5V synchronous boost converter.
- Standard Ports: Equipped with a Micro-USB port for charging input and a USB Type-A female port for 5V output.
- Integrated Protection Circuitry: Features built-in battery overcharge, over-discharge, short-circuit, and over-current protection.
- Onboard LED Indicators: Features LED status pads/lights to indicate charging and power status.
- Compact & Lightweight: Small form factor allows for integration into tight enclosures and portable DIY cases.
Product Specifications
- Model Board Revision: T6845-C V1.0
- Input Charging Voltage: 5.0V DC (via Micro-USB)
- Compatible Battery Type: 3.7V Lithium-Ion / LiPo batteries (e.g., 18650 cells)
- Battery Charging Cut-Off Voltage: 4.2V ± 1%
- Output Voltage: 5.0V DC ± 5% (via USB Type-A)
- Maximum Output Current: 1A continuous
- Battery Discharge Cut-Off: Approximately 2.9V–3.0V
- Board Dimensions: Approx. 22mm × 18mm
Wiring & Connections
- Battery Terminals:
- B+: Connect to the positive (+) terminal of the 3.7V Lithium-ion / 18650 battery.
- B-: Connect to the negative (-) terminal of the 3.7V Lithium-ion / 18650 battery.
- Input/Output Ports:
- Micro-USB Port (J1): Connect to a standard 5V USB charger to recharge the attached battery.
- USB Type-A Port (J2): Connect USB cables to output regulated 5V DC to power external devices.
Important Safety Note: Observe strict polarity when connecting the battery to B+ and B-. Reverse polarity connection will cause permanent damage to the control IC on the board.