About paul-arthur

paul-arthur · 2013-01-17

Posted on January 17, 2013 at 16:25Hello,I need a cheap 10mA current source. LM334 looks perfect for my application, but I cannot find out ratio n with the datasheet's curve ( The ''Ratio of Iset to V- current'' curve stop around Iset=6mA )Does anyo...

paul-arthur · 2012-06-06

Posted on June 06, 2012 at 15:59Hi,I'm working on a custom design with in a STM32F4xx. A 420mF capacitor is connected to Vbat. ( with a serial diode and a resistor between Valim and Vbat to charge up the supercapacitor ).The system power off it stil...

paul-arthur · 2013-01-28

Posted on January 28, 2013 at 14:14Up

paul-arthur · 2012-11-12

Posted on November 12, 2012 at 18:46 hello, Problem solved ! Please see: https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Vdd b...

paul-arthur · 2012-11-12

Posted on November 12, 2012 at 18:43hi guys,I get it !In my design PDR_ON was left unconnected. If i pull it up; this probleme is solved !what about your design ?byePAM

paul-arthur · 2012-11-05

Posted on November 05, 2012 at 19:46Any more information on that ?Thanks

paul-arthur · 2012-06-07

Posted on June 07, 2012 at 10:25Ok thank's.

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LM334 current source - Ratio of Iset to V- current at Iset=10mA

Vbat problem on a STM32F4

Re: LM334 current source - Ratio of Iset to V- current at Iset=10mA

Re: Vbat problem on a STM32F4

Re: Vdd being held at 0.7V with backup battery fitted

Re: Vdd being held at 0.7V with backup battery fitted

Re: Vbat problem on a STM32F4