DAK-68A Power Integrations, DAK-68A Datasheet - Page 10

• Manufacturer Part Number: DAK-68A
• Description: KIT DESIGN ACCELERATOR POE CONV
• Manufacturer: Power Integrations
• Series: DPA-Switch®r

Specifications of DAK-68A

• Main Purpose: Special Purpose DC/DC, Power Over Ethernet
• Outputs And Type: 1, Non-Isolated
• Power - Output: 6.6W
• Voltage - Output: 3.3V
• Current - Output: 2A
• Voltage - Input: 36 ~ 57V
• Regulator Topology: Flyback
• Frequency - Switching: 400kHz
• Board Type: Bare (Unpopulated) and Fully Populated
• Utilized Ic / Part: DPA423, DPA424, DPA425
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 596-1007

7.4 Transformer Build Diagram
7.5 Transformer Construction
Secondary Winding
Bobbin Preparation
Basic Insulation
Basic Insulation
Outer Insulation
Final Assembly
Pin Side
Bias Winding
½ Primary
½ Primary
9,10
6,7
Power Integrations
Tel: [phone] Fax: [phone]
www.powerint.com
1
5
4
2
3
Arrange bobbin & rotation such that primary start/finish wires do not
overlap.
Start at Pin 3. Wind 10 turns of item [3] in 1 layer. Bring finish lead back
and terminate on Pin 2.
Starting at Pin 4, wind 8 turns of item [3]. Spread turns evenly across
bobbin in a single layer. Bring finish lead back and terminate on Pin 5.
Use one layer of item [5] for basic insulation.
Start at Pins 9 and 10. Wind 2 turns of bifilar item [4] in 1 layer. Bring
finish lead back and terminate on Pins 6 and 7.
Use one layer of item [5] for basic insulation.
Continue from Pin 2. Wind 10 turns of item [3] in 1 layer. Bring finish lead
back and terminate on Pin 1.
Use one layer of item [5] for basic insulation.
Assemble and secure (glue or clamp, item[6]) core halves.
Dip varnish item [7] and cure.
Figure 6 - Transformer Build Diagram.
1/2 Primary
Bias
1/2 Primary
Secondary
Tape
Tape
Tape
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