SGM3756 38V LED Driver for Whatsminer and Antminer Hashboard Repair

SGM3756 38V High-Efficiency Boost White LED Driver | Integrated 40V / 1.5A MOSFET Boost Converter with 90% Efficiency, 1:250 Stable Dimming, Up to 10 LED Series Support for Whatsminer and Antminer Hashboard LED Indicator Repair

The SGM3756 is a 38V high-efficiency boost white LED driver — the LED-driver IC behind the status indicators on multiple Whatsminer and Antminer hashboards. Drop-in replacement for failed boost LED drivers during hashboard repair, restoring the visual status reporting that techs rely on for board-level diagnostics.

Integrates a 40V / 1.5A internal MOSFET in a single-package boost topology, operating at 1.2 MHz switching frequency for excellent line and load regulation. 38V open-LED protection supports up to 10 LEDs in series — typical for hashboard status arrays. 1:250 stable luminance dimming with ringing-elimination delivers low-EMI dimmed operation. Improved PSRR for waveless lighting means stable LED brightness even under noisy domain rails. Up to 90% efficiency with built-in soft-start and thermal shutdown protection for reliable hashboard service. Drives single or multiple parallel LED strings and serves as a general LED driver for backlight applications (smartphone, tablet, embedded).

Protection Functions

• LED open-circuit protection — automatic shutdown if LED string opens.
• Over-Current Protection (OCP) — limits inductor current under fault conditions.
• Thermal shutdown protection — prevents permanent damage from elevated junction temperature.
• Soft-start — controlled inrush at startup, reduces stress on input rail.

Typical Use in Mining Hardware Repair

• Whatsminer / Antminer hashboard repair — failed LED driver replacement to restore status indicator function.
• Hot-failure recovery — boost LED drivers often take collateral damage during board thermal events.
• Production refurbishment — bulk LED driver inventory for high-volume hashboard rebuild lines.
• General boost LED driver use — backlight applications for embedded displays, signage, indicators.

SGM3756 Specifications

FAQ — SGM3756 LED Driver

Q: How do I identify a failed SGM3756 on hashboard?
A: Typical signs: status LED string doesn't light at boot, intermittent LED behavior, visible burn marks around the IC, or no boost voltage on LED string anode. Test with multimeter for boost output (~5-38V depending on LED count) vs input (2.7-5.5V). Visual inspection for burn marks or cracked package confirms catastrophic failure.

Q: Why a boost converter instead of a simple resistor for LEDs?
A: Hashboard logic rails are typically 3.3V or 5V. White LEDs need 3.0-3.4V each — fine for 1 LED but impossible for 2+ in series from a 3.3V rail without boost. The SGM3756 generates up to 38V boost to drive 10 LEDs in series with controlled current — efficient even at low input voltages.

Q: Can I substitute another boost LED driver with similar specs?
A: For OEM-spec repair, no — the SGM3756 has specific pin assignments and silk-marking. Drop-in replacement requires the exact part. Functional equivalents (different brand of 38V boost LED driver) would need PCB rework to match the new pinout.

Q: Bulk pricing for hashboard repair shops?
A: Yes — email contact@lys-sz.com with your monthly hashboard rework volume for tier pricing on SGM3756 stock.

Related products

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• SGM6607 High-Voltage Boost Converter – Avalon Hashboard
• TPS61170 Boost Converter 1.2A – Avalon 1066 Hashboard

Hashboard refurb shops stocking SGM3756 by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.