Description:
This module is a synchronous step-up (boost) converter charger. Since a Type-C input typically provides 5V, this intelligent board boosts the voltage to the 8.4V required to fully charge two 18650 or 21700 batteries connected in series.
It features a sophisticated charging algorithm that includes a "trickle charge" mode for deeply discharged batteries, constant current (CC) charging, and constant voltage (CV) termination. The integrated 2A current rating ensures rapid charging while the built-in protection suite keeps your cells safe from over-temperature and short circuits.
Features:
Modern Type-C Interface: Eliminates the need for specialized DC barrel jacks; compatible with almost any USB-C power source.
Automatic Boost Charging: Efficiently converts 5V USB input to the 8.4V required for 2S lithium packs.
Smart LED Indicators: Features dual-status LEDs (typically Red for charging, Blue/Green for fully charged/standby).
Fully Integrated Protection: Includes input over-voltage, under-voltage, and output short-circuit protection.
Battery Temperature Monitoring: Supports an external 10k NTC thermistor (via dedicated pads) to stop charging if batteries overheat.
High Efficiency: The switching boost topology ensures minimal heat generation compared to linear chargers.
Specifications:
Input Voltage: DC 3V--6V
Input Interface: USB Type-C
Output Voltage: 8.4V
Charging Current: 2A
Switching Frequency: 500 kHz
Operating Temp: −40°C to +85°C
Efficiency: Up to 90%
Battery Type: 3.7V Li-ion / Li-Polymer (18650, 21700, etc.)
