7Semi 24V Fixed-Output Boost Converter Breakout Board With 2.5V to 5.5V Input, 1.2MHz Switching, and Overcurrent Protection
The 7Semi BO-10235 is a constant-frequency, current-mode step-up converter breakout board for small, low-power circuits. It accepts an input of 2.5V to 5.5V and delivers a fixed 24V output. From a 5V supply, it can supply up to 100mA. This makes it a practical 24V boost converter module for designs that run from a single-cell Li-ion battery, a 3.3V rail, or a 5V USB supply.
The converter switches at 1.2MHz, which allows compact external components. Its internal soft-start limits inrush current and helps extend battery life. At light loads, it shifts automatically to pulse-frequency-modulation mode to keep efficiency high, which is over 85%. Under-voltage lockout, current limiting, and thermal overload protection guard the board during output overload, so it is well-suited to prototypes and compact end products.
Key Features
- Fixed 24V Output: Steps up a low-voltage supply to 24V, with up to 100mA available from a 5V input.
- Wide Input Range: Works from 2.5V to 5.5V, covering most single-cell battery and 3.3V or 5V logic supplies.
- 1.2MHz Switching Frequency: Constant-frequency, current-mode operation allows small inductors and capacitors.
- Over 85% Efficiency: Automatic pulse-frequency-modulation mode at light loads reduces wasted power.
- Soft-Start: Reduces inrush current at start-up and helps preserve battery life.
- Overcurrent Protection: Internal 1.5A switch current limit protects the converter and the load.
- Thermal and Under-Voltage Protection: Thermal overload protection and under-voltage lockout prevent damage during fault conditions.
- Integrated Power MOSFET: The built-in switch reduces external part count and board space.
- Internal Compensation: No external loop-compensation network is needed, which simplifies design.
- Wide Temperature Range: Rated for -40 degC to +85 degC ambient operation.
Applications
The following are typical use cases for a 24V, 100mA-class boost converter (assumed, not listed in the source data):
- Battery-powered handheld instruments and portable devices
- Bias supplies for LCD, OLED, and LED backlight circuits
- Sensor and transducer excitation from a low-voltage supply
- Small relay, solenoid, or actuator drivers within the 100mA limit
- Embedded prototyping with Arduino, ESP32, Raspberry Pi, and similar boards
- Lab and bench experiments needing a compact 24V source
