D.A.(Tony)Stewart
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FYI ONLY
ON Semi has perfected this resonant half bridge primary side current or voltage regulator in a chip.
see the excellent Application Design Note ADN9131 in my blog. Using NCL310080,1,2,3 chip.
No Opto's needed for load current sensing
-Using Critical Valley Current sensing circuit for PWM to detect Flyback discharge time independent of ESR or leakage inductance normal variances.
- low Rsense drop and insensitive to usual tolerances on important but low cost external parts or input Vac 10% variations or LED Vf variations.
Other goodies on LED drivers and thermal sensors too and heat removal.
ON Semi has perfected this resonant half bridge primary side current or voltage regulator in a chip.
see the excellent Application Design Note ADN9131 in my blog. Using NCL310080,1,2,3 chip.
No Opto's needed for load current sensing
-Using Critical Valley Current sensing circuit for PWM to detect Flyback discharge time independent of ESR or leakage inductance normal variances.
- low Rsense drop and insensitive to usual tolerances on important but low cost external parts or input Vac 10% variations or LED Vf variations.
Other goodies on LED drivers and thermal sensors too and heat removal.