TNY284DG Off-Line Switcher IC for ASIC Miner PSU

TNY284DG Off-Line Switcher IC | 725V MOSFET for ASIC Miner PSU Power Conversion

The TNY284DG is an energy-efficient off-line switcher IC built specifically for the kind of high-voltage primary-side switching used in cryptocurrency mining power supply units. Its 725V-rated integrated MOSFET delivers the headroom required for direct-from-mains operation, while ±5% voltage regulation accuracy keeps the PSU output stable enough for the tight tolerances ASIC miners need to hash reliably.

Designed for 24/7 mining environments, the TNY284DG combines ON/OFF control simplicity (no complex compensation networks required) with frequency-jittering EMI reduction and hysteretic thermal shutdown — exactly the behaviour that keeps a PSU recoverable rather than dead after a transient fault. For repair benches working through APW-style failures or building drop-in replacements for Whatsminer/Antminer PSU boards, the TNY284DG is a reliable line-replaceable part.

725V-Rated MOSFET with Auto-Restart Protection for Reliable Mining Operations

• Enhanced BV derating margin for high-bus-voltage designs typical of mining PSUs.
• Auto-restart protection (<3% max power in faults) prevents mining downtime by recovering automatically after fault clearance.
• Frequency-jittering technology reduces EMI interference in dense mining-farm racks.
• ON-time extension minimises input capacitance requirements and simplifies the BoM.
• Hysteretic thermal shutdown with automatic recovery — protects the chip without forcing a manual reset.
• Simple ON/OFF control eliminates complex compensation networks.

TNY284DG Repair Use Cases

The chip is the brain of the primary-side feedback loop in an off-line flyback or quasi-resonant PSU. Failure modes typically present as a PSU that stays dead at the wall, cycles on/off when load is applied, or fails to start under cold conditions. Replacing the TNY284DG (after verifying the surrounding MOSFETs and rectifiers are healthy) is a standard recovery path that brings ASIC PSUs back to spec without a full board replacement. Beyond mining PSUs, the same part also lands in chargers, adapters, and similar off-line conversion designs.

TNY284DG Off-Line Switcher IC Specifications

Related products

• IXFP4N85X 850V N-Channel MOSFET (Mining PSU)
• STP6N95K5 950V N-Channel MOSFET (APW12 PSU)
• LTV-817C Optocoupler – APW8/APW9/APW17 PSU
• NSi8100N Isolator Chip – APW17 PSU

PSU repair shops ordering TNY284DG in tray quantities can email contact@lys-sz.com for bulk pricing and matched ASIC PSU repair kits. Worldwide shipping from our Shenzhen warehouse.