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AC/DC and Isolated DC/DC Power
AC/DC and Isolated DC/DC Power Forum
ON THIS PART IS THERE ANY PROBLEMS WITH THIS PART WORKING AT 400 HZ OUTPUT
BY SETTING THE RESISTOR FROM PIN5 TO PIN 6 THIS WILL PRODUCE PWM FOR PUSH-PULL APPLICATION ARE FULL BRIDGE BY USING EXTERNAL DRIVERS LIKE THE LM5112 /LM5110
Yes connecting a resistor from pin 5 to pin 6 will produce a PWM output for a push-pull, but you will need to use an external driver.
No the the LM5025 was not design to have an oscillator frequency of 400Hz, its' minimum oscillator frequency is around 100kHz.
OKAY THIS WILL BE GOOD FOR THE BOOST APPLICATION
100KHZ IS GOOD FOR THAT
OKAY OUTPUTS 5/6 WILL BE TIED TOGETHER WITH TWO DIODES AND INPUTED INTO A NON-INVERTING DRIVER LIKE THE LM5110 ITHINK
TO DRIVE THE EXTERNAL MOSFETS, I NEED TO MAKE A BOOST POWER SUPPLY WITH 18VDC TO 33 VDC INPUT AND HAVE APPROX. +250 VDC OUTPUT AT 5 AMPS CONT.
THIS PART WOULD BE OKAY FOR THAT APPLICATION
LET ME NO
NOW ON THE REGULAR PWM CPONTROLLER THAT I CAN USE FOR THE 400 HZ APPLICATIONS
LET ME NO THE BEST PART NUMBER WITH ALL THE HOUSE KEEPING FEATURES
If you want a boost, you may want to look at the LM5032, it can be used as a dual interleaved boost, this would reduce the output capacitor ripple current. I've attached the applications note. 4617.lm5032appnote.pdf
You could use the LM5025 if you want, the driver outputs are pins 8 and 9.
In the LM5K series of controllers I am not aware of any parts that will operate down to 400Hz. Maybe you can explain to me what you are trying to do, so I can make a recommendation.
YES I NEED TO DESIGH A STATIC INVERTER AT 400 HZ
WITH 18VDC -33VDC MAX.
I WILL BE DRIVING IN PUSH-PULL FOR THE LOW POWER UNITS AND FULL BRIDGE FOR THE HIGH POWER APPLICATION I NEED A CONTROLLER THAT CAN WORK DOWN IN THE 800HZ RANGE
I am going to have to check around and get back to you on this.
I checked around, here is an application note for a DC-AC inverter, maybe this will help.
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