The MY9291 is a 3‑ or 4‑channel constant‑current LED driver from MY‑Semi supporting 3.0‑5.5 V input and up to 350 mA per channel.
The MY9291 LED driver chip provides up to four constant‑current channels (R/G/B/W or R/G/B) with gray‑scale adaptive PWM control. It operates from a 3.0 V to 5.5 V supply and can deliver 5 mA‑350 mA per channel while tolerating up to 17 V output voltage.
The device features low‑EMI data transmission (20 Mbps‑140 kbps), selectable gray‑scale depth (16/14/12/8‑bit), programmable rise/fall times, and a built‑in gray‑scale clock supporting >2000 Hz refresh at 16‑bit resolution. It is offered in 20‑pin TSSOP (exposed pad), QFN, and SSOP packages and operates from –40 °C to +85 °C. This manual is written in Chinese.
| Input voltage range | 3.0 V to 5.5 V |
|---|---|
| Maximum output voltage | 17 V |
| Gray‑scale resolution | 16, 14, 12 or 8 bits |
| Package types | 20‑pin TSSOP (exposed pad), QFN, SSOP |
It operates from 3.0 V to 5.5 V.
It is offered in 20‑pin TSSOP (exposed pad), QFN, and SSOP packages.