ISL6740 INTERSIL [Intersil Corporation], ISL6740 Datasheet - Page 17

• Manufacturer Part Number: ISL6740
• Description: Flexible Double Ended Voltage and Current Mode PWM Controllers
• Manufacturer: INTERSIL [Intersil Corporation]

The order and geometry of the windings affects the AC
resistance, winding capacitance, and leakage inductance of
the finished transformer. To mitigate these effects,
interleaving the windings is necessary. The primary winding
is sandwiched between the two secondary windings. The
winding layout appears below.
FIGURE 7A. TOP LAYER: 1 TURN SECONDARY AND SR
FIGURE 7B. INT. LAYER 1: 1 TURN SECONDARY WINDING
FIGURE 7C. INT. LAYER 2: 2 TURNS PRIMARY WINDING
WINDINGS
17
ISL6740, 1SL6741
FIGURE 7F. BOTTOM LAYER: 1 TURN SECONDARY AND SR
FIGURE 7E. INT. LAYER 4: 1 TURN SECONDARY WINDING
FIGURE 7D. INT. LAYER 3: 2 TURNS PRIMARY WINDING
∅0.358
0.000
WINDINGS
0.184
FIGURE 7G. PWB DIMENSIONS
0.479
0.774
1.054
∅0.689
0.807
0.639
0.403
0.169
0.000
July 13, 2007
FN9111.4