Press OK to begin boosting. The "OUT" indicator light will illuminate. Navigating Display Modes
Confirms selections and turns the output power ON or OFF. Operating Modes (Simple vs. Full Function)
Press the button twice until the current display value (Amperes) flashes.
Connect your input power source to the and IN- terminals. Ensure the voltage is between 8V and 60V. bst900w manual
| 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. |
Ultimate Guide to the BST900W DC-DC Step-Up Boost Converter The BST900W is a high-power, digitally controlled DC-DC step-up (boost) voltage converter. It is widely used by electronics hobbyists, solar power enthusiasts, and DIY battery technicians. This comprehensive manual and guide covers everything you need to safely install, program, and operate your BST900W module. 1. Technical Specifications
The efficiency is highest when the input voltage is closer to the output voltage. Press OK to begin boosting
Some versions of the BST900W require manually starting the boost output.
Use the and ▼ buttons to adjust your target Current Limit . Press the OK button to save the parameters.
The BST900W can store up to 10 presets (addresses 0 through 9). Operating Modes (Simple vs
The BST900W is an excellent tool for hobbyists and professionals needing a flexible, high-power DC-DC boost converter. Its digital control, adjustable output, and programmable memory make it a versatile choice for many projects, from charging batteries to powering high-voltage devices from a lower-voltage source.
This section covers the core programming functionalities.