The ZK-5KX CNC Adjustable DC-DC Buck-Boost Power Supply Module (0.6V–36V / 5A / 80W) is a high-precision, digital programmable laboratory power supply module engineered for versatile voltage regulation, battery charging, and electronics bench testing. Featuring non-isolated buck-boost topology, it seamlessly steps input voltages of 5.0V to 30V DC up or down to deliver a fully adjustable output from 0.6V to 36V DC with true constant voltage (CV) and constant current (CC) modes. Equipped with a clear, high-contrast multi-parameter LCD display and an incremental rotary encoder with push-button controls, it provides real-time monitoring of output voltage, current, power, capacity (Ah), energy (Wh), and operating runtime. Integrated software and hardware protections—including reverse-polarity prevention, anti-backflow protection for direct battery charging, over-voltage (OVP), over-current (OCP), over-power (OPP), and over-temperature (OTP)—make it an essential tool for benchtop prototyping, solar MPPT regulation, DIY laboratory power supplies, and field battery management.

Specifications

• Model / Part Number: ZK-5KX (CNC Digital Buck-Boost Power Supply)
• Topology: Non-Isolated Synchronous Buck-Boost (Automatic Step-Up / Step-Down)
• Input Voltage Range (VIN): 5.0V to 30.0V DC
• Output Voltage Range (VOUT): 0.6V to 36.0V DC (Continuously adjustable via digital encoder)
• Output Current Range (IOUT): 0.000A to 5.000A (Continuously adjustable with CC limit)
• Output Power Rating:
  • Natural Air Cooling: Up to 35 W (continuous)
  • Enhanced / Fan-Assisted Cooling: Up to 80 W (continuous under optimal thermal dissipation)
• Voltage Display / Setting Resolution: 0.01 V
• Current Display / Setting Resolution: 0.001 A (1 mA)
• Voltage Measurement Accuracy: ±0.5% + 1 digit
• Current Measurement Accuracy: ±0.5% + 3 digits
• Conversion Efficiency: Typ. 88% to 92% (depending on VIN/VOUT differential and load current)
• Output Ripple: ≤ 100 mVp-p (at full load)
• Switching Operating Frequency: 180 kHz
• Display Type: Multi-Parameter Backlit LCD Panel
• Display Parameters: Real-time Output Voltage (V), Output Current (A), Output Power (W), Capacity (Ah), Energy (Wh), Running Time (h:m), Input Voltage (VIN), Temperature (°C)
• Integrated Safety Protections:
  • Input Reverse-Polarity Protection: Hardware MOS-based anti-reverse protection (no board burnout on reversed input)
  • Output Anti-Backflow Protection: Built-in anti-backflow diode (safe for direct battery charging without extra series diodes)
  • Input Under-Voltage Protection (LVP): 4.8V to 30V adjustable (Default: 4.8V)
  • Output Over-Voltage Protection (OVP): 0.6V to 37V adjustable (Default: 37V)
  • Output Over-Current Protection (OCP): 0.001A to 5.2A adjustable (Default: 5.2A)
  • Output Over-Power Protection (OPP): 0.1W to 81W adjustable (Default: 81W)
  • Over-Temperature Protection (OTP): Adjustable up to 100°C (Default: 100°C)
  • Over-Time-Out Protection (OPH) & Over-Capacity Protection (OAH): User-programmable safety cutoffs
• Control Interface: Digital Rotary Encoder with push-button + Dedicated ON/OFF and SW (Switch) Buttons
• Input & Output Connectors: Heavy-duty screw clamp terminal blocks (VIN+, VIN-, VOUT+, VOUT-)
• Operating Ambient Temperature: -10°C to +40°C
• Dimensions: Approx. 79 mm × 43 mm × 48 mm (L × W × H, Panel Mount Bezel)
• Panel Cutout Dimensions: Approx. 71 mm × 39 mm
• Weight: Approx. 65 g

Features

• True Buck-Boost Versatility: Automatically boosts or bucks the input voltage—allowing you to power a steady 12V or 24V load from a fluctuating 5V USB bank, 12V car battery, or 18V solar panel.
• Precise Digital CNC Adjustment: High-precision rotary encoder allows rapid, accurate digital stepping down to 0.01V and 0.001A without the drift or calibration issues of analog trimmer potentiometers.
• Constant Voltage (CV) & Constant Current (CC) Control: Seamlessly transitions between CV and CC modes, making it ideal for driving high-power LEDs and safely charging Lithium-ion, LiFePO4, or Lead-Acid batteries.
• Comprehensive Real-Time Telemetry: High-contrast LCD displays electrical metrics along with accumulated capacity (Ah), energy (Wh), and timer tracking for battery discharge/charge capacity testing.
• Built-in Battery Anti-Backflow Protection: Internal circuitry prevents reverse current from flowing back into the module when connected to charged batteries, eliminating the need for external blocking diodes.
• Compact Panel-Mount Design: Standard 79×43mm bezel with snap-in clips mounts flush into custom instrument enclosures, desktop lab power supplies, and portable field cases.

Common Applications

• DIY Benchtop & Laboratory Power Supply: Creating an adjustable, regulated desktop power station from recycled laptop power bricks or DC adapters.
• Multi-Chemistry Battery Charging: Constant-current/constant-voltage (CC/CV) charging for 1S–8S Li-ion, LiFePO4, NiMH, and 12V/24V Lead-Acid battery packs.
• Solar Panel Voltage Stabilization: Regulating fluctuating solar panel outputs into a fixed DC rail for field routers, sensors, and remote telemetry nodes.
• High-Power LED Driver: Driving single-color or COB LED arrays with precise constant-current regulation and dimming.
• Battery Capacity & Load Testing: Measuring true battery milliamp-hour (mAh) / watt-hour (Wh) capacities using accumulated telemetry readouts.

Usage Tips

• Power & Thermal Limits: The module is rated for **up to 35W with natural convection**. If operating continuously above 35W (up to its 80W peak limit) or drawing currents above 3A, install an external cooling fan and ensure adequate ventilation to prevent thermal throttling (OTP).
• Setting Voltage & Current Limits: Press the **rotary encoder knob** to select the digit position, turn the knob to adjust the value, and press the **SW** button to toggle between setting Voltage ($U$) and Current Limit ($I$). The output stays off until you press the **ON/OFF** button.
• Battery Charging Procedure: Before connecting a battery, power on the ZK-5KX, set the exact target full-charge voltage (e.g., 4.20V for 1S Li-ion, 14.4V for 12V Lead-Acid) and set your desired maximum charging current (e.g., 1.0A). Turn the output OFF, connect the battery observing polarity, and turn the output ON to begin CC/CV charging.
• Ground Isolation Note: The module is a non-isolated DC-DC converter. **Do NOT short or connect the Input Ground (VIN-) directly to the Output Ground (VOUT-) externally**, as this will bypass the internal current-sense resistor and disable constant-current (CC) limiting and current metering.
• Input Voltage Stability: Ensure your primary DC input power source can supply sufficient current during boost operation ($P_{IN} \approx P_{OUT} / 0.9$). Powering high boost loads from weak or thin input wiring will cause input voltage dips that may trigger the Under-Voltage Protection (LVP).