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5V Step-Up Power Module Lithium Battery Charging Protection Board USB For DIY Charger 134N3P

Specification	Details
Input Voltage	3.7V to 5.5V DC
Charging Current	1A (Max)
Output Voltage	5V DC
Output Current	1A (Max)
Battery Discharge Stop	2.9V
Charging Efficiency	85%
Standby Current	8uA

Price

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₹ 29.66

(Tax included)

Barcode: 96314

Product Description

The 134N3P Module is a highly integrated Power Management IC (PMIC) solution. It features a Micro-USB port for charging the connected lithium battery and a USB Type-A port for discharging power to external devices. The board includes a status LED that indicates the charging state (typically red for charging and green/blue for fully charged). Its internal protection logic prevents the battery from overcharging, over-discharging, and short-circuiting, making it a safe choice for beginner-level power projects.

Key Features

Triple Functionality: Combines charging, boosting, and protection on one miniature PCB, reducing the need for multiple separate modules.
Smart Charging: Automatically manages the charging cycle for 3.7V lithium batteries, ensuring long-term battery health.
Automatic Load Detection: The module intelligently wakes up when a device is plugged into the USB-A port and enters a low-power standby mode when no load is detected.
Integrated Protection: Safeguards your battery against discharging below 2.9V, which is critical for preventing permanent damage to Li-ion cells.
Compact DIY Design: Its small size makes it easy to fit into 3D-printed enclosures for custom portable chargers or "Jugaad" power banks.

Technical Details

Dimensions: Approx. 20mm x 18mm.
Indicator: Dual-color LED status.
Battery Compatibility: 3.7V Li-ion (18650) or Li-Polymer batteries.

Prototyping and Engineering Tips from Robogears

Polarity is Permanent: Be extremely careful when connecting your battery to the B+ and B- pads. This module does not have reverse polarity protection; swapping the positive and negative wires will instantly burn the 134N3P chip.
Heatsink for Continuous Use: While rated for 1A, the chip can get quite warm during extended charging or heavy 5V boosting. If you plan to draw 1A continuously, ensure there is adequate airflow or a small thermal pad in your enclosure.
The "Standby" Feature: If your project draws a very low amount of current (less than 50mA), the module might "think" there is no load and shut down the 5V output to save power. For low-power IoT sensors, you may need a TP4056 module paired with a separate boost converter instead.
Battery Capacity: This module works best with battery capacities between 1000mAh and 5000mAh. Larger batteries will work but will take a significantly long time to charge at the 1A rate.

Package Includes

1 x 5V Step-Up Power Module (134N3P)

Disclaimer

Use only with 3.7V/4.2V Lithium batteries. Never connect this module to AA, Ni-Cd, or Lead-Acid batteries, as the charging parameters are incompatible and could lead to a fire hazard.

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