- Apr 2, 2009
Subscribing--Ready to place orders--len
Just like the specification i wrote, the components are only on the top side of PCB, leaving th bottom side of PCB flat so that you can mount it on some heatsink perfectly, thus maximizing heat transfer.I take it you are going to use a PCB with a high thermal conductivity. Is this the only way to heat sink these ICs? I would still prefer to not use the bottom of the board if components will allow. Are the pots you are using multi-turn pots? Just trying to get a picture of the buck driver's ability to adjust from 1.1 amps to 6 amps. I would need to be able to get within a 100 mA scale. If it can do better, then that's wonderful. :thanks:
Let's say i have a laser diode that has a forward drop of 3.8 volts and requires 400 mA to operate. Would this driver work from a lithium cell that starts out at 4.2 volts and then discharges all the way to 3.0 volts (before safety circuits cut it off)?@paul:
You mean the PicoDrive right?
This driver is unique, the input voltage allows it to run with boost and sepic topology. With one lithium battery it can supply about 800mA+ to 5V load, with two lithium battery, you can get a double output current.
Making the DC-DC switching boost converter with regulated current is actualy just like making a sepic converter, the output voltage is depends on the load, the voltage will increased as the current trying to reach the set/limit current. The limitation lies on the capability/flexibility of the IC. The SuperDrive LV for example, can only have minimum output voltage of 2.9V regardless of the current, so that it can regulates itself properly and the max input.