Product Features:

1. The module utilizes imported chips, featuring low static power consumption, 500kHz low-ripple output, and high conversion efficiency. 2. Compact size with limited heat dissipation capability; continuous operating current should remain below 2A, and maximum voltage should not exceed 28V. 3. Low-ripple operation, multiple protections for safety assurance, including output short-circuit protection and built-in over-temperature protection. 4. Meticulous design, material selection, and PCB manufacturing enable this compact module to deliver impressive specifications and functionality. 5. High conversion efficiency reaching up to 93%. Product Specifications: Input: DC 30V (Max) Current Output: 3A Max Quiescent Current: 0.6mA Conversion Efficiency: Up to 93% 500kHz Low Ripple Output Short-Circuit Protection Built-in over-temperature protection Operating temperature: -40°C to +85°C Short version dimensions: 17mm × 13mm × 4.6mm Long version dimensions: 28mm × 15mm × 5.7mm Hole diameter: 2.6mm Primary applications: Low-voltage step-down, digital devices, MCU power supply, ripple-sensitive circuits, slightly higher voltage step-down. Differences: Both boards are essentially similar. The longer board offers slightly better ripple performance and stronger heat dissipation due to its larger size. Other differences are minimal; choose based on your requirements. Module Interfaces IN+: DC input positive terminal 4.5V-30V (must be at least 1V higher than output). IN-: DC input negative terminal, connected to output negative terminal. Output+: DC output positive terminal. Output-: DC output negative terminal, connected to the input negative terminal. Product Listing: 1X Module Usage Notes: ◆ Input voltage must exceed output voltage; maintaining a 1V+ voltage difference is optimal. Do not reverse polarity, as this will damage the board. ◆ Disconnect power before wiring. High-voltage connections may spark, posing risks of chip damage or breakdown. ◆ Use sufficiently thick wiring to ensure cables can handle the corresponding current. ◆ Protect inductive loads to prevent excessive back EMF exceeding the chip's tolerance range. ◆ Higher module power usage approaches the maximum current rating, increasing heat generation. Ensure adequate heat dissipation during operation. ◆ Without external cooling, continuous current usage should remain below 5A. Exceeding 5A requires additional cooling to prevent thermal shutdown. ◆ Recommended operating voltage is below 24V. If supply voltage instability causes spikes exceeding 25V, the internal overvoltage protection will activate. Maintain a margin for stable operation. ◆ When encountering issues during use, contact customer service and provide wiring diagrams, usage videos, etc. Text-only descriptions are unacceptable.