cupoftea
Advanced Member level 6
Hi,
We wish to use the PA1005.100NTL (100:1) as a unipolar current sense transformer in our 350W Boost converter.
{Vin = 18V, vout = 58V, Fsw=100kHz, L =40uH}
The datasheet gives no V.us product.
It just gives B(max) = 37.59 x Vref x Dmax x 1E5 / N x Freq(kHz)
For us, Dmax = 0.7
Freq = 100kHz.
Controller = UCC28C43 (with current sense ref voltage of 1V)
So that means we have a peak B of 0.076T.
In the bold equation above (taken from datasheet), i took "Vref" to mean the peak voltage across the secondary coil.
Would you agree?
The thing is, that is not "Vref". The peak voltage across the secondary coil is V(sense_reference) + Vf + (Ipk/100) x R(sec).
So why are they using "Vref" in the bold equation above?
PA1005.100NTL
We wish to use the PA1005.100NTL (100:1) as a unipolar current sense transformer in our 350W Boost converter.
{Vin = 18V, vout = 58V, Fsw=100kHz, L =40uH}
The datasheet gives no V.us product.
It just gives B(max) = 37.59 x Vref x Dmax x 1E5 / N x Freq(kHz)
For us, Dmax = 0.7
Freq = 100kHz.
Controller = UCC28C43 (with current sense ref voltage of 1V)
So that means we have a peak B of 0.076T.
In the bold equation above (taken from datasheet), i took "Vref" to mean the peak voltage across the secondary coil.
Would you agree?
The thing is, that is not "Vref". The peak voltage across the secondary coil is V(sense_reference) + Vf + (Ipk/100) x R(sec).
So why are they using "Vref" in the bold equation above?
PA1005.100NTL