6. Frequently Asked Questions
▶>
While not natively dimmable, it can support some forms of dimming via external circuitry, though it’s optimized for fixed output designs.
>
No, MT7939 is used in non-isolated configurations, so a transformer is not typically required — reducing cost and design size.
>
Yes, it supports a wide input range (85–265V AC), making it globally compatible.
>
Similar PSR controllers include BP9916, OB2263, HV9910, and MPS MP4056 depending on power level and application.
>
Incorrect labeling, altered date codes, or performance deviations in power factor or regulation accuracy may signal counterfeits.