The is a high-power DC-DC CNC boost power module designed for precise voltage and current regulation, often used for DIY power supplies or solar charging. Key Technical Specifications Input Voltage: 8V – 60V DC. Output Voltage: 10V – 120V DC (Adjustable). Output Current: 0A – 15A (Adjustable). Output Power: Up to 900W. Efficiency: Approximately 85%. Resolution: 100V is 0.1V. Main Features
Enters programming modes and toggles through parameter saves.
| Feature | Details | Notes | | :--- | :--- | :--- | | | DC-DC Step-Up (Boost) Converter | Increases input voltage to a higher output voltage. | | Input Voltage | 8.5V ~ 60V DC | Do not exceed 60V. Some sources specify a minimum of 9V. | | Output Voltage | 10V ~ 120V DC | Must be at least 2V higher than the input voltage for proper operation. | | Max Output Current | 15A (can be limited) | Maximum, but sustained use near this limit may require additional cooling. | | Max Output Power | 900W | The theoretical maximum at 100% efficiency. Real-world maximum will be lower. | | Max Efficiency | ~85% | Common figure across multiple sources; actual efficiency depends on the input/output configuration. | | Switching Frequency | 150 kHz | Affects output ripple and filtering requirements. | | Control Type | Digital with 4-button interface| Uses an STM8S003F3 microcontroller. | | Display | Options: 4-digit 7-segment LED or 1.77" TFT LCD | The display type and resolution vary by version. | | Protections | Short Circuit (Current Limiting, Constant Current mode), Overheat, Overload | No reverse polarity protection ; improper connection will damage the device. | | Fuse | 20A Fuse (non-resettable) on some versions | Replacement of this fuse can be a simple DIY repair if the device fails to power on. | | Storage Profiles | 10 programmable memory slots| For saving and recalling voltage and current settings. | | Physical Size | Varies by version: 110 x 100 x 40mm / 110 x 105 x 48mm| A compact, open-frame design. | | Weight | ~215g - 243g | Very lightweight, making it easy to integrate into projects. | bst900w manual
Press the button twice to enter current adjustment mode. Use the ↑up arrow or ↓down arrow buttons to set the maximum allowable current (A). Press SET again to save. 3.4 Saving Settings (Memory Function)
Long-press OK to enter the memory recall menu, select your saved slot, and press OK . 4. Advanced Settings (Special Modes) The BST900W has three hidden functions for automation: 0-n: Automatic output on power-up. 1-n: Cycle display (Voltage, Current, Power, Capacity). The is a high-power DC-DC CNC boost power
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Press to save the values to that slot. The screen will stop flashing to confirm success. Recalling a Profile Output Current: 0A – 15A (Adjustable)
: Increases values or cycles upward through memory registers.
Connect your input power source (ensure it is within the 8V-60V range).
Enters setting mode or toggles between Voltage (V), Current (A), and Capacity (Ah). ↑ (Up): Increases the value. ↓ (Down): Decreases the value. OK: Confirms settings or toggles the output ON/OFF. 3. Basic Operation Setting Output Voltage and Current
Press the SET button again to save the parameters. The display will stop flashing.