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Old 30th December 2012, 12:50 PM   #1
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Default smps

Hello
greetings having assembled this smps its working but IC VIPER12A
should give 15.5 volts on connecting to pin 1 of IR2153 supply drops to 8 volts smps is being used with top ic 244 voltage does not drop and smps works can anyone help out
warm regards
andrew lebon
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Old 30th December 2012, 03:18 PM   #2
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You are using the VIPER12N as a step-down converter?
Try using a simple 2W resistor for startup and an auxiliary turn on the main transformer as a supply for the IR2153.
Be aware that the IR2153 ha sa built in zener-diode, do not fry it.
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Old 30th December 2012, 03:28 PM   #3
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Hi Lorylaci
greetings thanks for your kind reply this is my second smps i am a newbie
in smps i will try what you say i had one board salvaged from old smps using TOP244
from 310 volts dc i get 15.6 volts dc which i use for IR2153 THANK YOU
warm regards
andrew lebon
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Old 30th December 2012, 03:32 PM   #4
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Default smps

This schematic works same problem have to feed 15.5 volts to pin1
of IR2153 IC iused IRFP460 FETS
warm regards
andrew lebon
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Old 31st December 2012, 01:09 PM   #5
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Default SMPS HELP

Hello
greetings viper 12A voltage dropping to 8 volts on connection to ir2153
taken 310 volts dc supply to viper ic input should i try connecting to ac 220volts using ultrafast diode and 10uf 450 volts cap
warm regards
andrew lebon
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Old 31st December 2012, 01:20 PM   #6
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Default smps

smps without totem
warm regards
andrew lebon
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Old 1st January 2013, 01:23 PM   #7
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Default SMPS

Some pictures while testing
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Old 2nd January 2013, 02:21 AM   #8
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