Product description What this product does and why you need it - Reliable, efficient lithium battery charging and boost power management for development, repair, or integration into portable devices. - Fast, intelligent charging that adapts to battery condition and supported fast-charge standards to maximize charging speed while protecting the battery. - Built-in protections and Type-C compatibility simplify integration and reduce the need for external circuitry. Key benefits - High efficiency: Charging and boost stages reach up to 95 percent efficiency, reducing heat and energy loss. - High-current charging: Switching charger supports up to 5 A to enable fast charging up to approximately 21 W under constant-current operation. - Wide battery compatibility: Configurable for common lithium battery target voltages (4.2 V, 4.35 V, 4.4 V, 4.5 V) and compliant with the SIITA specification. - Broad protocol support: Compatible with many input and output fast-charge protocols so the module negotiates the best available power with connected chargers and devices. - Safe and autonomous: Multiple hardware protections and automatic charge-mode transitions protect battery health and simplify use. Technical highlights - Charger engine: Switching charger capable of up to 5 A charging current, up to 95 percent efficiency, with temperature regulation support. - Boost converter: Synchronous boost output up to 22.5 W, up to 95 percent efficiency, with automatic load detection and light-load detection; supports wireless charging mode and low-current mode. - Supported output fast-charge protocols: PPS, PD 3.0, PD 2.0, QC4 Plus, QC4, QC3.0, QC2.0, AFC, FCP, SCP, PE2.0, PE1.1, SFCP, VOOC. - Supported input fast-charge protocols: PD 3.0, PD 2.0, AFC, FCP, SCP, PE1.1. - USB Type-C: Integrated Type-C interface logic with role and CC detection support for plug-and-play compatibility. - BC1.2 module: Supports BC1.2 DCP mode and charging modes commonly used by Apple and Samsung devices. - Protection features: Input overvoltage protection, output overcurrent and short-circuit protection, charge timeout and overvoltage protection, and temperature protection. Charging behavior and logic - Three charging phases: maintenance mode, constant-current mode, and constant-voltage mode. - Maintenance mode: If the battery voltage is below 3.0 V, the module provides a 300 mA maintenance charge to safely revive deeply discharged cells. - Constant-current mode: When battery voltage exceeds 3.0 V, charging switches to constant-current at the configured target current for maximum charging speed; available power can reach about 21 W. - Constant-voltage mode: Once battery voltage reaches the selected target (for example 4.2 V), the charger holds that voltage while current tapers down; charging ends when current falls to the defined cutoff. - Automatic restart: If the pack voltage drops by 0.1 V below the target after full charge, the module restarts charging automatically. - Indicator behavior note: A voltage reading above a target voltage can be normal during regulation and does not necessarily indicate a fully charged battery; a blinking status