The HKD ZK-4KX CNC DC-DC Buck Boost Converter is a versatile and precision-controlled power module capable of both stepping up and stepping down DC voltage. With adjustable output voltage (0.5-30V) and current limiting (0-4A), it is ideal for regulated power supply applications, including solar charging, battery conditioning, and general-purpose electronics development.
This module combines a high-efficiency switch-mode power supply with CNC rotary encoder control, real-time LCD display, and multiple programmable protection features, making it a reliable and user-configurable solution for both hobbyists and professionals.
Key Features
- Buck and boost operation: Supports input and output voltages from 5V to 30V
- Wide output voltage range: Fully adjustable from 0.5V to 30V
- Adjustable constant current mode: Up to 4A limit with fine resolution control
- LCD display: Shows real-time input/output voltage, current, power, energy, and elapsed time
- CNC control: Digital encoder for precise, fast voltage and current adjustments
- High efficiency: Approx. 88% conversion efficiency
- Strong heat management: Equipped with thickened radiator fins; natural cooling supports up to 35W, extended cooling allows up to 50W
- Soft start: Prevents sudden inrush current at power-up
Built-In Protections
- Input reverse polarity protection
- Output anti-backflow protection (no external diode required)
- Input undervoltage protection (adjustable 4.8-30V, default 4.8V)
- Output overvoltage protection (adjustable 0.5-31V, default 31V)
- Overcurrent protection (adjustable 0-4.1A, default 4.1A)
- Overpower protection (adjustable 0-50W, default 50W)
- Overtemperature protection (adjustable 80-110 C, default 110 C)
- Timeout protection (0-100h, off by default)
- Super capacity protection (0-60Ah, off by default)
Specifications
- Input Voltage: 5.0V-30V DC
- Output Voltage: 0.5V-30V DC
- Output Current: 3A continuous, 4A max with enhanced cooling
- Output Power: 35W (natural cooling), 50W (with cooling)
- Voltage Display Resolution: 0.01V
- Current Display Resolution: 0.001A
- Operating Frequency: 180 kHz
- Dimensions: 79mm × 43mm × 26mm
User Interface & Operation
- Display switching: Press SW to cycle display between current (A), power (W), capacity (Ah), and time (h); long press to toggle between input (IN) and output (OUT) voltage view.
- Voltage/Current Adjustment: Press U/I to enter voltage/current set mode; use rotary encoder to set precise values; auto-exits after 10s of inactivity.
- Startup State: Long press U/I to toggle between default output ON or OFF at power-up.
- Protection Parameters: Accessed via long press of U/I and cycling with SW-adjust protection thresholds via rotary encoder.
Calibration and Tips
- Calibration: Available for input/output voltage and output current; calibration is recommended only above 12V (voltage) or 1A (current) for best accuracy.
- Do not short input and output terminals-this disables constant current mode.
- Ensure input power exceeds output load requirements, especially at high current levels.
- For full-load operation (>3A or >35W), additional heat dissipation is essential.
- For maximum power output, input voltage should be 8V (5V input limits output to ~15W).
This module is ideal for use in adjustable power supplies, battery chargers, solar applications, lab tools, and any project requiring regulated and monitored DC power with advanced protection and precision tuning.
What's in the box
1 x HKD 0.5-30V 4A CNC Buck Boost Converter Power Module
