Hi,
I'm designing a flyback SMPS power supply with the UCC28740 controller.
The design will have a universal input (approx. 95-264VAC), and two DC voltage outputs (5V and 24V).
Max 24W on the output (24V will draw max around 0.8A, and around 50mA on the 5V circuit).
To get away with only one SMPS circuit I was thinking to use an isolation transformer with multiple outputs, so that I could get both 5V and 24V straight from there.
Does anyone know of an isolation transformer I could use for this purpose? I found this, but the turns ratio between 24V and 5V will not give me exactly 24V and 5V. If I design the circuit for 24V output, I will get around 5.3V on the 5V circuit which is a bit too high. The 5V is going to power a microcontroller (atmega 324) and a 16x2 LCD. The 24V doesn't have to be exactly 24V but can be 24V +/- 3%.
Thanks!
I'm designing a flyback SMPS power supply with the UCC28740 controller.
The design will have a universal input (approx. 95-264VAC), and two DC voltage outputs (5V and 24V).
Max 24W on the output (24V will draw max around 0.8A, and around 50mA on the 5V circuit).
To get away with only one SMPS circuit I was thinking to use an isolation transformer with multiple outputs, so that I could get both 5V and 24V straight from there.
Does anyone know of an isolation transformer I could use for this purpose? I found this, but the turns ratio between 24V and 5V will not give me exactly 24V and 5V. If I design the circuit for 24V output, I will get around 5.3V on the 5V circuit which is a bit too high. The 5V is going to power a microcontroller (atmega 324) and a 16x2 LCD. The 24V doesn't have to be exactly 24V but can be 24V +/- 3%.
Thanks!