Jul 29, 2002 #1 F freetools Newbie level 6 Joined Dec 31, 1999 Messages 13 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 18 Hi I need to design some power supply with this characteristics: Vin: 60-70V Vout: Adj (3.3v..5v..10v) Iout: 100..150 ma Ignd: really low (as low as posible). I have only 100 mW for all the circuit, and I need a power suppy with very very low Ignd (very power loss) tia! regards
Hi I need to design some power supply with this characteristics: Vin: 60-70V Vout: Adj (3.3v..5v..10v) Iout: 100..150 ma Ignd: really low (as low as posible). I have only 100 mW for all the circuit, and I need a power suppy with very very low Ignd (very power loss) tia! regards
Jul 29, 2002 #2 G gabby Member level 5 Joined Mar 18, 2002 Messages 91 Helped 4 Reputation 8 Reaction score 4 Trophy points 1,288 Location Israel Activity points 1,233 Hi Firt i think that you will need an isolated dc-dc power supply for that high voltage.(it posible that you need a second dc-dc regulator too,after you have a first low voltage from the high votage in). you have some comp that make dc-dc converters first option look on linear: https://www.linear.com/prod/pft.html?product_family=power chose switch-regulators/step-down/high-voltage-input(vin>=36) and you get some regulators some example : https://www.linear.com/pdf/1725f.pdf second option maxim **broken link removed** Best regards. Last edited by a moderator: Nov 3, 2021
Hi Firt i think that you will need an isolated dc-dc power supply for that high voltage.(it posible that you need a second dc-dc regulator too,after you have a first low voltage from the high votage in). you have some comp that make dc-dc converters first option look on linear: https://www.linear.com/prod/pft.html?product_family=power chose switch-regulators/step-down/high-voltage-input(vin>=36) and you get some regulators some example : https://www.linear.com/pdf/1725f.pdf second option maxim **broken link removed** Best regards.
Jul 29, 2002 #3 ted Full Member level 3 Joined Mar 12, 2002 Messages 182 Helped 28 Reputation 56 Reaction score 24 Trophy points 1,298 Activity points 2,866 Vishay-Siliconix is a good alternative for high input voltages (so-called Telecom voltages) See for example Si9117, and several other possibilities - depending on features needed: **broken link removed** Good luck, Ted Last edited by a moderator: Nov 3, 2021
Vishay-Siliconix is a good alternative for high input voltages (so-called Telecom voltages) See for example Si9117, and several other possibilities - depending on features needed: **broken link removed** Good luck, Ted