i am trying to get different output ranges 12V 1A, 7.5V 3A and 5V 1A with 12V input using TPS65251 or any other regulator. its possible to get as a single kit from Texas with this specifications. if it is not possible circuit also enough.
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i am trying to get different output ranges 12V 1A, 7.5V 3A and 5V 1A with 12V input using TPS65251 or any other regulator. its possible to get as a single kit from Texas with this specifications. if it is not possible circuit also enough.
hi,
Then make some change in my design. instead of 12 V, i want 7.5V 3A, for buck1 9V 2A for buck2 and 5V 1A for buck3 with TPS65251. is it possible to get a sample with this voltage level???
Hi,
I made a circuit for that using TPS65251 and already ordered sample also. once i get the sample, i can make changes in evaluation module and i can try to get my required voltage and current level. But, i have one more doubt weather if i apply 15 V input voltage then i can get 12 V. by the time no need to bother about tolerance. is it possible???
Hi,
if i have made changes to the resistor R12= 2.87 k, R13 = 4.8 k and R15 = 7.66 k ,in EVM module is it possible to get my required output of 9V, 5V and 7.5V respectively.
hi,
I have done circuit for 100 Vdc with 12 V input. now i have a doubt
1. is it possible to get 50V with same circuit. if yes what should i do weather introduce voltage divider into the output Or need to make change in switching function
2. I have tried with voltage divider in simulation i am getting exactly 50 V as a output but when we introduce voltage divider for high voltage circuit produce high heat. so what is possibility to get 50 V.
3. if need to change in switching circuit how to do that.
Hi
Apologies for the delay in responding here.
The TPS65251 is a step down converter so that the output voltage will always be less than the input voltage so I don't understand how it is that you are getting 50V output.
The power loss in the resistor is simply V^2/R. For a given voltage the only way to reduce the power loss is to increase resistance.
If you still have some difficulty, then send me the schematic of the simulation ---
Regards
Colin
sir,
Sorry the IC i mentioned for 100 V and 50 V is TPS40210 not for TPS65251. wrongly posted in this forum.
Hello Sakthivel
The input bias current specification for the FB pin is 300nA maximum - this current flows out of the pin.
Regards
Colin