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Old 25th February 2008, 06:49 AM   #1
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Default Current Mode Control And Voltage Mode Control

HI ALL,

Can anyone suggest me a PWM IC for current mode control and voltage mode control...that is used in a half bridge SMPS.
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Old 25th February 2008, 03:16 PM   #2
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Hi

Check Uc 3848, it is current cont.... some of the are both voltage and current, but you must know what you want, is that peak control, average,...Use google....
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Old 25th February 2008, 05:15 PM   #3
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Peak current mode and standard half bridge are not compatible without modification. Look at this for a solution:
http://www.fairchildsemi.com/an/AN/AN-7531.pdf

Voltage mode chips: TL494, SG3525
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Old 26th February 2008, 02:35 AM   #4
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Quote:
Originally posted by luka
Hi

Check Uc 3848, it is current cont.... some of the are both voltage and current, but you must know what you want, is that peak control, average,...Use google....


thank you . actually what i want is a peak current mode control.
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Old 26th February 2008, 08:26 AM   #5
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Then you will need a balancing winding, check out that application note from Fairchild for an example how it can be done.
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