AC/DC to DC Buck Step-Down Converter

Features:

• Flexible Power Input: Equipped with a 4A rectifier bridge stack and dedicated DC/AC terminals, supporting both AC ($5\text{V}–30\text{V}$) and DC ($5\text{V}–50\text{V}$) power inputs.
• Input Limitations & Safety Margin: The maximum input voltage is capped at $50\text{V}$ (limited by the filter capacitor's voltage rating). Due to typical AC voltage fluctuations, the recommended AC input range includes a built-in safety margin.
• Adjustable Output: The output voltage is adjustable from $3.3\text{V}$ to $33\text{V}$ (note: actual output depends on the applied input voltage range).
• Current & Thermal Performance: Features an external heatsink for improved thermal dissipation. Supports continuous, stable operation at $2.2\text{A}$, with short-term output up to $3.0\text{A}$.
• Clear Terminal Markings: Dual-sided PCB silkscreen labels clearly indicate terminal names on both front and back. Please verify all labels prior to soldering to prevent component damage.

Electrical Parameters:

• Input Voltage Range: AC $5\text{V}–30\text{V}$ / DC $5\text{V}–50\text{V}$
• Output Voltage Range: DC $3.3\text{V}–33\text{V}$
• Output Current: $2.2\text{A}$ continuous ($3.0\text{A}$ short-term peak)
• Module Dimensions: $51\text{ mm}\times 26\text{ mm}$