SLM346CK-DG Gate Driver – 5kV 2.5A for Whatsminer P221B P221C P222B P222C PSU
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SLM346CK-DG Isolated Gate Driver | 5kV 2.5A Driver for Whatsminer P221 / P222 PSU Repair
The SLM346CK-DG is a single-channel isolated gate driver in the SO6 SMD package — the gate-drive isolation IC used on the Whatsminer P221B, P221C, P222B, and P222C power supplies for high-frequency MOSFET switching with primary-secondary isolation.
Headline specs: 5000Vrms isolation voltage, 2.5A peak source/sink current, high common-mode transient immunity (CMTI), low propagation delay, minimal pulse-width distortion. Drives the main switching MOSFET gate while maintaining the isolation barrier between PSU primary and secondary control sides.
When to Replace the SLM346CK-DG
- PSU fails to start — gate-drive signal dead to the main switching MOSFET.
- Erratic switching — gate output asymmetric, distorted pulses, or CMTI failures from PSU transients.
- Isolation breakdown — 5kVrms barrier compromised, primary-secondary leakage.
- Visible damage on the SO6 package — burnt or cracked.
SLM346CK-DG Specifications
| Parameter | Specification |
|---|---|
| Type | Isolated single-channel gate driver |
| Package | SO6 SMD |
| Isolation Voltage | 5000Vrms |
| Peak Output Current | 2.5A (source/sink) |
| Common-Mode Transient Immunity (CMTI) | High |
| Propagation Delay | Low |
| Pulse Width Distortion | Minimal |
| Compatible PSU | Whatsminer P221B / P221C / P222B / P222C |
FAQ — SLM346CK-DG Gate Driver
Q: How do I confirm the driver is the failed part?
A: Probe the gate-drive output pin with a 100MHz scope while the PSU controller tries to start. Healthy driver produces clean rail-to-rail PWM pulses matching the controller's primary-side input. No output, stuck high/low, or distorted = chip failed.
Q: SLM346CK-DG vs SLM346 base variant — interchangeable?
A: The "CK-DG" suffix denotes specific package and grade. Match the silk marking exactly — different suffixes have different pinouts or current ratings. The base SLM346 (covered in P2-170 fiche) is the broader family reference.
Q: Rework profile?
A: Hot air at 320°C with flux paste. SO6 is small (3×3mm body) and contains a sensitive internal optical / capacitive isolation barrier — keep peak below 250°C and limit dwell time to avoid stressing the isolation.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com for tape-and-reel quantities.
Related products
- SLM346 Base Gate Driver Variant
- SI8261BBD 5kV Isolated Gate Driver
- NSI6602B Isolated Gate Driver
- Whatsminer P221C PSU 3300W
Whatsminer P221 / P222 PSU repair benches stocking SLM346CK-DG drivers in volume? Email contact@lys-sz.com for tape-and-reel pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
