I have a question about the TM1803 - looking at the data sheet is says the maximum Vdd is either 5 or 7V (depending on the data sheet :0). A lot of the cheapo LED strips you buy have 3 LED in series connected to each chip, and the circuit is powered with 12V.
Why doesn't this fry the chip? Or is the data sheet wrong?
The data sheets for the TM1804, TH1809 says "working voltage" up to 24V so I suspect the data sheets are wrong and that the whole line of TM chips will work fine on 12V. Or else the designers are shipping LED strips that will burn out quickly from running the TM1803 over specs?
(Radio Shack is clearing our their 1M 30-LED 1803-based strips for $7, which is why I ask. 3 LEDs in series for each chip, but they are very bright and it's not a bad deal for $7.....)
TIA w
(Links to datasheets; tm1803 datasheet pdf - Google Search)