BLL2740 Buck DC/DC Converter, 42V Input, 3.5A Output, CC/CV Control, SOP-8 Package
Shanghai Belling
The BLL2740 is a high-efficiency step-down (buck) DC/DC converter designed for high-voltage input applications requiring constant current (CC) and constant voltage (CV) regulation. With input support up to 42V and output capability up to 3.5A, it is well suited for power conversion in industrial, automotive-adjacent, and LED driving systems. Its integrated control architecture enables stable performance, high efficiency, and minimal external components, all within a compact SOP-8 package.
Key Specifications
Input Voltage (VIN): Up to 42V
Output Current (IOUT): Up to 3.5A
Control Mode: Constant Voltage (CV) / Constant Current (CC)
Topology: Step-down (Buck) switching regulator
Efficiency: High-efficiency switching design
Package: SOP-8
Applications
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LED drivers and lighting systems
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Industrial power supplies
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Battery charging circuits
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Automotive power conversion (non-safety critical)
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DC power distribution
Features
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Wide input voltage range up to 42V
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High output current capability (3.5A)
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CC/CV dual regulation modes
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High efficiency with low heat generation
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Compact SOP-8 package with simple peripheral design
