Antminer L3+ U73 Step-Down Power Module DC Board Voltage Regulator Black Version
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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
| Parameter | Value |
|---|---|
| Compatibility | Antminer L3+ |
| Board Area | U73 |
| Function | Step-down (buck) voltage regulator |
| Reference Chip | LM27402S 27402S |
| PCB Colour | Black |
| Solder Joints | 8 external (4 pad-only + 3 or 4 wired) |
| Lead Time | 3 days |
| MOQ | 10 pieces |
| Condition | New |
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+.
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