FANT
Advanced Member level 1
![Advanced Member level 1](/styles/images/ranks/glevel1.gif)
DC-DC converter trouble
Hi guys, I need your help !
I am trying to build a switching voltage regulator for this application:
input voltage : from 1,2 to 6 Volt from 4 * 1,2 V 4Ah NI-CD batteries
Output voltage : about the same as the imput if the input voltage is above 4,5 V, regulated at 4,5 Volt if the battery voltage is below ( until 1,2 V )
Output current : 0,8 A for a incandescent lamp ( consider that at the tur-on the resistance of the lamp is very low )
The regulator has to be switching to improuve the efficency.
The application is for the lamp used on the headset of the miners friends of mine.
I have already used the Maxim MAX1709, but as the input voltage is higher than 4,5 Volt, the IC is usable only to fry the eggs !
Thanks for any suggestion
Hi guys, I need your help !
I am trying to build a switching voltage regulator for this application:
input voltage : from 1,2 to 6 Volt from 4 * 1,2 V 4Ah NI-CD batteries
Output voltage : about the same as the imput if the input voltage is above 4,5 V, regulated at 4,5 Volt if the battery voltage is below ( until 1,2 V )
Output current : 0,8 A for a incandescent lamp ( consider that at the tur-on the resistance of the lamp is very low )
The regulator has to be switching to improuve the efficency.
The application is for the lamp used on the headset of the miners friends of mine.
I have already used the Maxim MAX1709, but as the input voltage is higher than 4,5 Volt, the IC is usable only to fry the eggs !
Thanks for any suggestion