DC Buck Boost Converter 40W/90W Adjustable Lab Power Supply

DC Buck Boost Converter – Adjustable Regulated Laboratory Power Supply (SK40 / SK90)

Take full control of your bench power needs with this precision DC-DC Buck Boost Converter. Available in 40W (SK40) and 90W (SK90) configurations, this compact step-up/step-down module delivers stable, adjustable output voltage and current — making it the ideal regulated power supply for electronics hobbyists, engineers, and lab professionals.

Note: The SK40 model does not include a cooling fan. The SK90 model features an extended external fan port for enhanced thermal management.

Made in Mainland China.

Key Features

• High-Quality PCB Construction – Oxidation-resistant solder pads improve conductivity, reduce line impedance and contact resistance for long-lasting reliability.
• Intuitive Silicone Keypads – 5 independent soft silicone buttons for voltage/current adjustment. One-touch entry and exit — fast, simple, and far more durable than mechanical keys.
• 1.8-Inch Color Display – Large 36×29mm visible area screen provides clear, at-a-glance readout of voltage, current, and power settings.
• 11 Memory Groups – Save and recall up to 11 preset configurations instantly for rapid workflow switching.
• ~88% Conversion Efficiency – High-efficiency design minimizes energy waste and heat generation.
• Soft Start Function – Gradual power ramp-up protects sensitive connected devices from sudden current surges.
• Buzzer Alert – Audible feedback for protection events and setting confirmations.

Specifications

Built-In Protection Mechanisms

• Input Anti-Reverse Connection – Prevents damage from accidental reverse polarity.
• Output Anti-Backflow – Stops reverse current from flowing into the module.
• Input Undervoltage Protection (LUP) – Adjustable 5.5–35V (default: 5.5V).
• Output Overvoltage Protection (OUP) – Adjustable 0.5–37V (default: 37V).
• Output Overcurrent Protection (OCP) – SK40: 0.001–4.6A; SK90: 0.001–5.2A.
• Output Overpower Protection (OPP) – SK40: up to 41W; SK90: up to 91W.
• Over Temperature Protection (OTP) – Adjustable 30–99°C (default: 90°C).
• Timeout Protection (OHP) – 1–99 hours 59 minutes (default: off).
• Overcapacity Protection (OAH) – 0.001–9999Ah (default: off).
• Super-Energy Protection (OPH) – 0.001–4000KWh (default: off).

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Frequently Asked Questions

Q: What is the difference between the SK40 and SK90 DC buck boost converter models?

A: The SK40 delivers up to 40W of output power with a maximum output current of 4.5A and does not include a cooling fan. The SK90 offers a higher 90W output with up to 5A current capacity and features an extended external fan port for additional cooling — ideal for more demanding power supply applications.

Q: Can this DC-DC converter both step up and step down voltage?

A: Yes. This module is a true buck-boost converter, meaning it can both step down (buck) voltage when the output is set lower than input, and step up (boost) when a higher output voltage is needed — all within the 0.5V–36V output range and 6V–36V input range.

Q: Is the output voltage and current calibratable on this regulated power supply module?

A: Absolutely. Both voltage (±0.3% + 3 digits) and current (±0.5% + 3 digits) readings are user-calibratable, ensuring precise measurements for laboratory and professional bench use. Up to 11 preset memory groups can be stored for quick recall.

Q: What input voltage does this buck boost converter require?

A: The module accepts a DC input voltage in the range of 6V to 36V. The output can be adjusted independently between 0.5V and 36.00V with a resolution of 0.01V, giving you fine-grained control over your power supply settings.