Output-Ripple Filtering

Output voltage ripple can be reduced with a lowpass

LC pi-filter (Figure 7). The component values shown

give a cutoff frequency of 21.5kHz by the equation:

Use an inductor with low DC resistance and sufficient sat-

uration current rating to minimize filter power dissipation.

f

LC

dB

3

1

2

=

π

3W Primary-Side Transformer H-Bridge Driver

for Isolated Supplies

______________________________________________________________________________________

13

Table 2. Suggested External Component Manufacturers

MANUFACTURER

COMPONENT

WEBSITE

PHONE

Central Semiconductor

diodes

www.centralsemi.com

631-435-1110

Halo Electronics

transformers

www.haloelectronics.com

650-903-3800

Kemet

capacitors

www.kemet.com

864-963-6300

Sanyo

capacitors

www.sanyo.com

619-661-6835

Taiyo Yuden

capacitors

www.t-yuden.com

408-573-4150

TDK

capacitors

www.component.tdk.com

888-835-6646

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land patterns

(footprints), go to www.maxim-ic.com/packages. Note that a

“+”, “#”, or “-” in the package code indicates RoHS status only.

Package drawings may show a different suffix character, but

the drawing pertains to the package regardless of RoHS status.

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE NO.

LAND

PATTERN NO.

8 SO-EP

S8E+12

21-0111

90-0150