2024-07-07 07:25 PM
Hi Sir,
What's the max output current?
There only shows the min current 20mA of Io.
Thank you.
@STLD40D
Solved! Go to Solution.
2024-07-08 01:33 AM
As with any boost regulator, the maximum output current depends on various parameters: output voltage = length of the LED chain, duty cycle, inductance, peak current, ripple current, etc. If you set the maximum peak current to 1A with Rset, you may be able to achieve a current of 35mA instead of 20mA, but this also requires a coil with a corresponding saturation current (min. 2A).
Please also take a look at AN2333, which deals with the dimensioning of the circuitry.
Does it answer your question?
Regards
/Peter
2024-07-08 01:33 AM
As with any boost regulator, the maximum output current depends on various parameters: output voltage = length of the LED chain, duty cycle, inductance, peak current, ripple current, etc. If you set the maximum peak current to 1A with Rset, you may be able to achieve a current of 35mA instead of 20mA, but this also requires a coil with a corresponding saturation current (min. 2A).
Please also take a look at AN2333, which deals with the dimensioning of the circuitry.
Does it answer your question?
Regards
/Peter
2024-07-08 11:34 PM
Hi Peter,
Thanks for your feedback.
Could you help share the equation of ILIMIT and RSET, ILed and RLED?
I cannot find the equation in datasheet.