May 19, 2007 #1 S saurav_sdpl Full Member level 3 Joined Sep 29, 2006 Messages 185 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,298 Activity points 2,522 I have designed a power line interrupt circuit which should occur at least 200mS before reset. Vin=4.5V Vout=3.3V Cout=1000uF cin=4.7uF Interrupt is given through a transistor BC847 from low-to high, with 4.5V connected at base. I am using TPS3823 as reset IC. When i analyze it i see reset ocuuring before PDD. I am not able to understand the reason plz suggest
I have designed a power line interrupt circuit which should occur at least 200mS before reset. Vin=4.5V Vout=3.3V Cout=1000uF cin=4.7uF Interrupt is given through a transistor BC847 from low-to high, with 4.5V connected at base. I am using TPS3823 as reset IC. When i analyze it i see reset ocuuring before PDD. I am not able to understand the reason plz suggest
May 23, 2007 #2 A arturt134 Full Member level 2 Joined Dec 31, 1999 Messages 125 Helped 8 Reputation 16 Reaction score 8 Trophy points 1,298 Location Poland Activity points 1,006 Re: Power line interrupt Need more info about hardware. Please send any schematic. But, for the first look, try to change hardware to generate interrupt on high->low edge, or low level. When the power is falling, there may be not enough voltage to generate high state. Regards.
Re: Power line interrupt Need more info about hardware. Please send any schematic. But, for the first look, try to change hardware to generate interrupt on high->low edge, or low level. When the power is falling, there may be not enough voltage to generate high state. Regards.
Jun 8, 2007 #3 M mg_designs Banned Joined Jun 8, 2007 Messages 18 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 0 Power line interrupt trinng to change hardware to generate interrupt on high->low edge, or low level is good sugget
Power line interrupt trinng to change hardware to generate interrupt on high->low edge, or low level is good sugget