24V Boost Converter from 4.5V to 20V Input
The project presented here is a boost converter with 24V output from 4.5V to 20V DC Input. The project is built using an LT8357 chip and configured as a boost converter. Under voltage lockout, and soft-start are a few key features of the project. LED D1 indicates the output, and screw terminals are provided for easy output and input connections.
The LT8357 is a wide input range, current mode, and DC/DC controller which can be configured as a boost, SEPIC, or flyback converter. The LT8357 drives a low-side N-channel power MOSFET with a 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed frequency operation, or internal 19% triangle spread spectrum operation for low EMI. At light load, either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations with a wide 3V to 60V input voltage range and 8μA low quiescent current, the LT8357 provides a simple, compact and efficient solution for automotive, industrial, and battery-powered systems.
Connections
- CN1: Pin 1 = DC Supply Input 4.5V to 20V DC, Pin 2 = GND
- CN2: Pin 1 = +24V DC Output, Pin 2 = GND
- D2: Power LED
Features
- Input Supply Range 4.5V to 20V
- Output 24V DC (Up to 2Amps)
- Operating Frequency 200Khz
- Under Voltage Lockout 4.3V
- Efficiency Up to 90-95%
- Soft Start Feature
- PCB Dimensions 46.04 x 30.80 mm
- Power LED On Output
- 4 x 2.5mm Mounting Holes
Share
The project presented here is a boost converter with 24V output from 4.5V to 20V DC Input. The project is built using an LT8357 chip and configured as a boost converter. Under voltage lockout, and soft-start are a few key features of the project. LED D1 indicates the output, and screw terminals are provided for easy output and input connections.
The LT8357 is a wide input range, current mode, and DC/DC controller which can be configured as a boost, SEPIC, or flyback converter. The LT8357 drives a low-side N-channel power MOSFET with a 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed frequency operation, or internal 19% triangle spread spectrum operation for low EMI. At light load, either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations with a wide 3V to 60V input voltage range and 8μA low quiescent current, the LT8357 provides a simple, compact and efficient solution for automotive, industrial, and battery-powered systems.
Connections
- CN1: Pin 1 = DC Supply Input 4.5V to 20V DC, Pin 2 = GND
- CN2: Pin 1 = +24V DC Output, Pin 2 = GND
- D2: Power LED
Features
- Input Supply Range 4.5V to 20V
- Output 24V DC (Up to 2Amps)
- Operating Frequency 200Khz
- Under Voltage Lockout 4.3V
- Efficiency Up to 90-95%
- Soft Start Feature
- PCB Dimensions 46.04 x 30.80 mm
- Power LED On Output
- 4 x 2.5mm Mounting Holes
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