Antminer L3+ U73 Step-Down Power Module DC Board Voltage Regulator Black Version

Antminer L3+ U73 Step-Down Power Module – DC Board Voltage Regulator (Black Version)

When the U73 power chip on an Antminer L3+ hashboard is damaged or the voltage domain reads zero, this step-down power module is the repair. The black-PCB version drops directly into the U73 position, restoring the regulated rail that feeds the ASIC chain and getting the board back to full Scrypt hash rate.

8-Point Solder Installation with Flexible Wiring Options

The module exposes 8 external solder joints. Four joints connect directly to pads and do not require wire bridges. The remaining connections offer two wiring configurations: 3 external wires for fixed-voltage operation via PIC, or 4 external wires for adjustable-voltage operation via PIC. Choose the configuration that matches your board revision.

Connection Pin-Out Reference

The solder points are labelled GND (ground), 12 V (input rail), EN (power-on enable signal), HG & LG (high-side and low-side MOS gate drives), DAOUT (PIC voltage regulation output), and FB(mos) & SW(out) (feedback and inductor output). Refer to the board silk screen to match each pad before soldering.

L3+ U73 Step-Down Module Specifications

Related L3+ Hashboard Repair Components

• L3+ U73 Step-Down Module (Green Version)
• LM27402S Switching Controller IC
• L3+ 220 Inductor Voltage Booster
• BM1485 Tin Fixture for L3+ Hashboard

Servicing a fleet of L3+ miners? Contact us at contact@lys-sz.com for module pricing on quantities of 50+.

Worldwide shipping from our Shenzhen warehouse.