Other Parts Discussed in Thread: UC3825 , TL5001 Hi,
I am about to built a 12V to 48V boost circuit using UC3825, the circuit below is my design
The input of Feed-Back varies from 0-48V(lab DC power supply). The outputs PWM did not change and stay at 46…
Part Number: UC3843 Other Parts Discussed in Thread: UC3825 Hi ,Have a good day.
we got a special power requirement that we hope to complete a flyback power supply with a wide voltage output to achieve adjustable output from 0V-250V, and the maximum power…
UC3825.TSC
Sir i want a closed loop control of this simulation. But i cannot achieve this. Even after the EA becomes zero, still i get output pulses from UC3825, so I cannot control the output. Also i need to input the power value for the transformer…
Hi Lutz,
Thanks for the background information. I think your best bet is likely with a voltage mode, fixed frequency, PWM controller like UC3825 + external driver. You will have more flexibility for tailoring the buck converter behavior to suit your application…
Part Number: UC3825A Other Parts Discussed in Thread: UC3825 Hi Sir:
I use the Device UC3825,In the open Loop.It is OK. But In Closed Loop. The Pin Limt is connect to GND. And I test the 5.V-Vref,RAMP is OK the Clk the 40%.and The secondary side feedback…
Part Number: UC3825A Other Parts Discussed in Thread: UC3825 Dear
I used UC3825DW to design a full-bridge power supply ,and the load is a 470Khz amplifer.
when the amplifer works on 70Ws and 100 ohm status, the UC3825 didn't work normally. it's supposed…
Steve,thanks for reply;
The reason for using the UC3825A/B is I have quite alot of them. Very short propagation delays should deal with the issues, but not so. Something isn´t happy. Maybe, you are spot on re bullet No4, the so-called blind-start is exactly…
Hi Aniket,
I thought I had already replied to this but for some reason the post was never updated.
The Vcc is supplied through two series 150k resistors into a 10uF cap. Can you check the Vcc on start-up it may be discharged quickly before the output…
Part Number: UC2825 Other Parts Discussed in Thread: UC3825 , , UCC28950 , UC3842 , LM5045
Dear TI,
I have a question about the operation of the UC2825 IC for a Full Bridge Boost converter, with duty cycles above 50% on the alternating PWM outputs OUTA…
Hi-Colin-san
Thank you for the reply.
The attached document is the customer's consideration circuit.
I think they can not use UC3825 with that design.
Can I use the circuits of ① or ②?
UC3825.pdf
Best regards,
Yokota