By: Tech Recovery Labs
The culprit is not a virus or a failing NAND chip. It is a thermal design flaw in the controller itself. This article dives deep into why the runs so hot, the difference between heat and throttling, and how to fix it permanently. Part 1: What is the Phison PS2251-07 / PS2307? Before solving the heat issue, we must understand the hardware. phison ps225107ps2307 hot
A: No. 70°C is the danger zone . Normal should be 35°C–50°C. By: Tech Recovery Labs The culprit is not
A: Yes, many revisions of the DT100 G3 use the PS2251-07. It is notorious for overheating. Part 1: What is the Phison PS2251-07 / PS2307
Early revisions of the PS2307 firmware had no temperature throttle. The controller would run at full speed until the NAND flash's solder joints began to reflow (soften). Later firmware added throttling, but it is reactive, not preventative. By the time the throttle kicks in, the drive is already dangerously hot.
A: Absolutely. Move the PCB into a metal USB enclosure with a thermal pad. This drops temps by 20-30°C.
| Symptom | What is happening | | :--- | :--- | | after 2 minutes of copying a large video file. | Controller junction temp exceeds 80°C. | | Speed suddenly drops 90% (e.g., 100 MB/s → 10 MB/s). | Firmware thermal throttling activates. | | Windows "Code 43" or "USB Reset Failed" | Controller thermal shutdown causes a voltage sag, disconnecting the USB bus. | | Copy pauses for 10-20 seconds before resuming slowly. | NAND controller enters error recovery mode due to bit errors caused by heat. | | Drive disappears and reappears in File Explorer. | Thermal protection circuit tripped. |