UCC27210DR MOSFET Gate Driver - ASIC Miner PSU Repair

UCC27210DR MOSFET Gate Driver | 4A High-Side / Low-Side Driver SOIC-8 for ASIC Miner PSU Repair

The UCC27210DR is a high-side / low-side MOSFET gate driver in the SOIC-8 SMD package, designed for high-power switching converters where minimal switching loss and fast transitions matter. Used on ASIC miner PSU and hashboard power stages driving large power MOSFETs in synchronous buck topologies.

Headline specs: 4A peak source / sink current, 0.9Ω pull-up and pull-down resistance, 7.8V to 20V supply range, 8ns rise / 7ns fall time, full operating range from −40°C to +140°C junction. The strong drive and low output impedance keep gate transitions sharp under heavy load, which directly reduces switching loss and MOSFET heat at the kilowatt scale of ASIC mining power stages.

When to Replace the UCC27210DR

• Power stage MOSFET damage — when a power MOSFET dies, the driver is often killed in the same event and must be replaced together.
• PSU stuck at start, no PWM — driver output dead, MOSFETs not switching.
• Asymmetric or distorted gate waveforms — high-side or low-side path degraded.
• Excessive switching loss / MOSFET overheat — slow gate transitions caused by partially-failed driver.
• Visible damage on the SOIC-8 package — burnt, cracked, or discoloured.

UCC27210DR Gate Driver Specifications

FAQ — UCC27210DR Gate Driver

Q: How do I confirm the gate driver is the failed part?
A: Scope the gate pins of the suspect MOSFET pair with the PSU controller trying to start. Healthy driver produces clean rail-to-rail pulses (typically 12V swing) on both high-side and low-side outputs in phase with the controller's PWM. No output, distorted shape, or stuck high/low = driver failed.

Q: Always replace the driver when a MOSFET dies?
A: Strongly recommended. The voltage spike from a shorting MOSFET very often takes the driver with it, even if the driver still appears to be working. Skipping the driver replacement is a common cause of repeat failures within hours of returning to service.

Q: Rework profile?
A: Standard SOIC-8 rework. Preheat to 100°C, hot air at 320°C with flux paste, watch for warpage on the body. Verify all 8 pins solder cleanly under magnification before powering up.

Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for tape-and-reel quantities.

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PSU repair benches stocking UCC27210DR gate drivers in tape-and-reel volume? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.