Design Guide & Applications Manual
Maxi, Mini, Micro Family DC-DC Converters and Configurable Power Supplies
Maxi, Mini, Micro Design Guide
Rev 5.0
Page 5 of 87
03/2018
1. High-Density DC-DC Converter Technology
+OUT
+SENSE*
SC
–OUT
–SENSE*
+IN
PC
PR
–IN
Primary Control IC
Secondary Control IC
The Maxi, Mini, Micro’s ZCS / ZVS power-processing architecture
(Figure 1.3) enables efficient, low-noise, high-frequency operation.
The main switch is common drain for improved thermal and noise
management. The reset switch located within the primary control
IC is common source for ease of control.
The control circuitry is integrated into two (primary- and
secondary-side) ICs. The result is a significant reduction in parts
with the ensuing savings in cost and increase in reliability. This
integration also provides extra room for the power train.
Maxi, Mini, Micro transformers place the primary and secondary
windings far apart, but contain the magnetic flux using a copper
armor plated onto the ferrite core. The armor also conducts excess
heat to the baseplate.
Figure 1.3 —
Maxi, Mini, Micro: Basic powertrain and control (*Not included in Micro family)
