SGM3750 Boost Converter Chip – LED Driver for Whatsminer M20S M21S Hashboard

SGM3750 Boost Converter Chip | LED Driver for Whatsminer M20S M21S Hashboards

The SGM3750 is a high-efficiency boost converter / LED driver chip designed for the LED indicator chains on Whatsminer M20S, M21S, and Antminer V9 hashboards. Engineered for up to 90% efficiency in a compact TDFN-2×2-6L package, it delivers stable PWM dimming control from 5kHz to 100kHz with zero audible noise — exactly what mining hardware needs in repair and replacement scenarios where a damaged LED driver knocks the board's status indication offline.

With a wide 2.7V-20V input range and built-in 38V open-LED protection, the chip handles the mixed-voltage rails and component-level fault conditions common to ASIC hashboards. Built-in soft-start reduces inrush current at power-up, extending hardware lifespan, and the chip operates reliably from -40°C to +85°C — wide enough for harsh mining-environment deployments.

Reliable 650kHz Boost Converter with PWM Dimming & Open-Circuit Protection

• Wide input voltage range (2.7V-20V) — compatible with various mining setups and hashboard designs.
• Open LED protection (38V) — prevents damage to ASIC miner components when an LED chain opens.
• Precision dimming (1:500 range) — smooth brightness adjustment for mining-farm efficiency.
• Soft-start function — reduces inrush current to extend mining-hardware lifespan.
• Zero audible noise — PWM frequency from 5kHz to 100kHz keeps the chip quiet across all dim settings.

SGM3750 Repair Workflow

When a Whatsminer M20S / M21S hashboard's LED status indication fails or shows partial illumination, the SGM3750 boost converter is the most likely culprit. Replacement is straightforward: locate the chip on the LED driver section of the hashboard, remove with hot-air rework, clean the pads, place the new TDFN-2×2-6L device with correct orientation, reflow, and bench-test the LED chain through its full PWM range to confirm the dimming control is restored.

SGM3750 Boost Converter Chip Specifications

Related products

• Whatsminer M20 / M20S / M21 Hashboard Tester
• Whatsminer CB2 V8 H3 Control Board (M20/M21)
• Whatsminer KF1922 Tin Tool Kit (M20/M21)
• Whatsminer CB4 V10 H6 Control Board

Repair benches ordering SGM3750 in tray quantities can email contact@lys-sz.com for bulk pricing and matched M20/M21 hashboard kits. Worldwide shipping from our Shenzhen warehouse.