Designing Half Bridge SMPS 360W.........Which PWM controller is to be used ?

[abcsantosh]

Hi all, I want to design a half bridge converter with following specs.
Output : 36VDC with 10A Single isolated output
Input   : 400Vdc PFC Stage (This stage is ready)

suggest me, which pwm controller is to be used ? easy availability in market and application notes is preferable. 
I want to incorporate current mode control and optical feedback technique.

Have a Nice Day

[beque]

The UC38X6 series (UC3846/UC3856/UCC3806) is best suited for your application...

[Orcino Borges]

Hi, SG3525 is the best choice.

             Orcino 

[abcsantosh]

Hi Orcino Borges, SG3525 is Voltage mode controller. isn't it? correct me, if I am wrong.
I want to incorporate peak current mode control.

beque, UC3846/3856 is not available here. Only UC3842-44 is available. If low cost controller is not available, I am going to use SG3524. It is available.
 
Anyway, refer some application notes with sg3524/3525 SMPS circuits if possible.

Have a Good Day

[arash_tah]

Hi abcsantosh
Search in texas instrument site in power switching  there are very good documents for your application

[ALLPIC]

Microchip having application note useing dspic33F GS series that works very good

[tAhm1D]

Hi abcsantosh,
You can use PWM controller like SG3524/SG3525. One such circuit is present in the ST application note for SG3525:
www.st.com/stonline/products/literature/anp/1689.pdf
Hope this will help you.

[medik]

Hi tAhmID. Can i do the function of SG3524 with a PIC?

[Orcino Borges]

Hi.
  I use the circuit attached to control current or voltage.

                              Orcino

[MAXPAYNE]

Hi.
  I use the circuit attached to control current or voltage.

                              Orcino

Pls post uor full prjct......I am interested...........

[tAhm1D]

Hi Orcino Borges,
This circuit can be made easier with using only SG3525 or only PIC. But if you have to use both, why are you using SPI?
Anyway, the circuit isn't bad, I just think you slightly complicated it.

[MAXPAYNE]

Hi Orcino Borges,
This circuit can be made easier with using only SG3525 or only PIC. But if you have to use both, why are you using SPI?
Anyway, the circuit isn't bad, I just think you slightly complicated it.

But i think using this way, the current can be controlled more precisely.................

[Orcino Borges]

Hi,
      This is part of a project charger lead acid batteries, the PIC you can select the current and voltage and the type of charge.
I use the SPI  to talk to the DAC 7513  and thus generate the reference voltage according to load current chosen. I finished a new project using the DSPIc 30F2020 that will do all the work.

[Diramo]

Hi,
I made my design - compact high efficiency (92% 220VAC line, 88...90% 90...120VAC) charger for LiFePO4 battery - 42.5V max, 400W. Topology - PFC+resonant half bridge converter. PFC made with UCC28060, schematic diagram almost same as in the application note shown at TI website. Resonant converter - FSFR2100 from  Fairchild. It is a resonant controller and power MOSFETs assembly. Low cost. Circuit diagram has been taken from application note. I just included resonant inductor 80uH in series with the power transformer because I did not find special bobbin for resonant transformers. Voltage-current control chip - TSM1011. And PIC16F883 as a controller. It generates voltage and current reference control DC values for TSM1011 in accordance with the charging profile.
Design is very simple, robust and cheap. This charger already commercialized by my former company.

[tpek]

Diramo i have one question.
Can You regulate output voltage in whole range (for example from 1 to 24V) in your design?

If yes tell me how You do it in resonant converter when output voltage depends from main switching ferquency.

[Diramo]

No. I can regulate output voltage in current design only in range 32...64V. There is resonant converter topology and the output voltage regulation can not be very wide. But, using the other chip, not FSFR2100 (resonant converter) but FSFA2100 (asymmetric converter), you can obtain the necessary output voltage range. If you want to have a wide regulation range in resonant converter there is should be used additional post-regulator, either buck or magamp. Or use power factor corrector with buck or SEPIC topology as a pre-regulator.

[Jehan]

TL494 is  good choice for half bridge