T
treez
Guest
Please could you advise on the operation of the LM3421 LED driver IC?
LM3421 datasheet:
**broken link removed**
(block diagram is on page 10)
1….Off time duration:
Is the off time duration simply the length of time that it takes the “CT” capacitor, connected to pin 5, “RCT”, to charge up from 0V to Vin/25 Volts?
(page 30 shows the “RCT” pin and buckboost connection.)
I presume that during the main FET ON time, the RCT pin is held at 0V by the internal FET inside the LM3421?
LM3421 datasheet:
**broken link removed**
(block diagram is on page 10)
1….Off time duration:
Is the off time duration simply the length of time that it takes the “CT” capacitor, connected to pin 5, “RCT”, to charge up from 0V to Vin/25 Volts?
(page 30 shows the “RCT” pin and buckboost connection.)
I presume that during the main FET ON time, the RCT pin is held at 0V by the internal FET inside the LM3421?