The HW-133-v1.0 datasheet is a functional masterpiece of necessity. It isn't pretty, and it isn't overly detailed, but it serves as the perfect bridge for beginners moving from blinking an LED to moving a robot.
Pros:
Cons:
The HW-133 v1.0 is a compact, high-efficiency DC-DC step-down (buck) converter module, typically based on the MP2403 synchronous rectified switch-mode converter. It is widely used in DIY electronics for its small footprint and low heat generation compared to older LM2596-based modules. Technical Specifications
The following data is compiled from representative technical performance reports and manufacturer data for the core MP2403 chip: HW-133 v1.0 Specification Input Voltage 4.75V to 32V Output Voltage 1.0V to 20V (Adjustable via onboard potentiometer) Output Current 3A (Maximum peak), 2A (Continuous recommended) Efficiency Up to 95% (e.g., ~92% for 7.4V to 5V conversion) Quiescent Current ~0.8 mA (Low idle draw) Switching Frequency Dimensions 17 x 11 x 3.8 mm (Ultra-compact) Output Ripple ≤45mVpp (at 1MHz BW) Key Performance Highlights Hw-133-v1.0 Datasheet
Thermal Stability: Unlike standard linear regulators, this module operates efficiently with minimal thermal throttling even at high loads.
Compact Form Factor: At roughly the size of a fingernail, it is ideal for space-constrained projects like drone builds or portable IoT devices.
Synchronous Rectification: This design reduces power loss through the diode, contributing to its high 90%+ efficiency rating. Comparison: HW-133 vs. LM2596
Reports from electronics hobbyist communities suggest the HW-133 is a superior alternative to the common LM2596 buck converter for battery-powered applications: The HW-133-v1
Size: Significantly smaller (17x11mm vs 43x21mm for standard LM2596 boards).
Efficiency: Consumes roughly 75% less idle current than LM2596 modules.
Cleanliness: Offers lower output ripple voltage, making it safer for sensitive microcontrollers. SARA-R5 series
While there is no official "Hw-133-v1.0 Datasheet" from a major semiconductor company, the following documents provide equivalent information: The HW-133 v1
📄 Note for Datasheet Archives: If you are creating a library or a GitHub repository for this module, use the pinout and timing diagrams provided in this article. Always test the module with a multimeter before connecting to sensitive microcontrollers.
If you are reading the HW-133 datasheet, you are likely holding a small, red PCB with a distinct blue potentiometer and a cluster of pins. This is the L298N Motor Driver Module.
While the internal chip is the STMicroelectronics L298N (a legacy dual H-bridge), the HW-133 refers to the module design—specifically the v1.0 PCB layout that integrates the chip with heat sinks, 5V regulation, and convenient screw terminals.
The datasheet for HW-133 is distinct from the official L298N chip datasheet. The chip datasheet talks about internal transistors and logic gates; the HW-133 datasheet tells you how to not burn your house down while plugging it into an Arduino.
Understanding the operational principle helps you use the datasheet effectively.