Hi,
Sorry for sooo late response. I think my transformer is fine - pictures below shows osciliscope signals on primary and secondary side. Last picture shows the voltage after D4 and D5 schottkys.
With unplugged load - Vout is 22,5 V but when I try to…
Voltage Mode.docx Doug,
Glad to hear you are making progress.
The oscillator for this part is running at twice the PWM frequency so if you want a 200kHz PWM then the oscillator needs to run at 400kHz.
That is why you need about 11k here.
You are using…
Part Number: UCC2808A-1Q1 Other Parts Discussed in Thread: PMP9522 Team,
We are working on a design for push-pull power supply with UCC2808A in an EV application. Do you have any recommendations for a transformer (ideally if fitting to the below specs…
Part Number: UCC2808A-1Q1 We use TI's UCC2808 device for an asymmetric half-bridge resonant power supply, as shown in the figure.
With 250 kRC frequency and 100 uH 1:1.008 turn ratio of TDK, the output load capacity of 40 mA is too weak, resulting…
Other Parts Discussed in Thread: TL431 Hi,
We are using UCC2808A for our isolated power supply design, but datasheet doesn't have much info on designing. Have some of following doubts:
Q1. for type-II compensator across TL431, what decides the frequency…
Hi James,
Vin is very low at 9V the input current will be something like 55A or higher to allow for power dissipation through the power stage.
Most customers use push-pull topology for higher powers in this voltage range.
UCC2808A is an option,
Another…
