View 190
Truth About Six-Pack Abs
Top Movie Downloads + 20 Sites
Renewable Energy Solutions
As Seen On Tv
Download Games Traffic
Mp3 Download Support
Internet Tv 3000+Channels-Great Seller
Run A Car On Water.
New Edition - Satellite Tv For Pc.
The dc-dc converter substitutes a voltage tripler in place of the external inductor and the diode thats typically associated with the switching regulator, IC1. Inverting and noninverting amplifiers in the MOSFET-driver (IC2) activate a diode-capacitor tripling network (D1 through D3, C1 through C3).
Click on Picture for Full Size
A 50-kHz oscillator residing within IC1 produces the EXT signal (pin 6). IC2 converts this signal into drive signals (180 C out of phase) for the tripler.
The resulting charge-discharge action in the capacitors recharges C3 toward 10 V every 20 ms. The ferrite bead limits output ripple to about 20-mVpp for a 50-mA load. Conversion efficiency is about 70% for the 5-V input, 10-V output configuration.
|
