DAK-68A Power Integrations, DAK-68A Datasheet - Page 2

• 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

1
2
3
4
5
6
7
8
9
10 Waveforms ................................................................................................................15
11 Thermal Performance................................................................................................20
12 Control Loop Measurements .....................................................................................22
13 Revision History ........................................................................................................24
Important Note:
Although this board is designed to satisfy safety telecom isolation requirements, this
engineering prototype has not been agency approved.
4.1
4.2
4.3
7.1
7.2
7.3
7.4
7.5
9.1
9.2
9.3
10.1
10.2
10.3
10.4
10.5
12.1
12.2
Introduction..................................................................................................................3
Power Supply Specification .........................................................................................4
Schematic ...................................................................................................................5
Circuit Description .......................................................................................................6
PCB Layout .................................................................................................................7
Bill of Materials ............................................................................................................8
Transformer Specification ...........................................................................................9
Transformer Spreadsheet .........................................................................................11
Performance Data .....................................................................................................13
9.2.1 Load...............................................................................................................14
9.2.2 Line ................................................................................................................14
10.5.1 Ripple Measurement Technique ....................................................................18
10.5.2 Output Ripple Measurements ........................................................................19
DPA-Switch Primary............................................................................................6
Output Rectification .............................................................................................6
Output Feedback.................................................................................................7
Electrical Diagram ...............................................................................................9
Electrical Specifications.......................................................................................9
Materials..............................................................................................................9
Transformer Build Diagram ...............................................................................10
Transformer Construction..................................................................................10
Efficiency ...........................................................................................................13
Regulation .........................................................................................................14
Peak Power .......................................................................................................15
Drain Voltage and Current, Full Load Operation ...............................................15
Output Voltage Start-Up Profile .........................................................................16
Drain Voltage and Current Start-Up Profile .......................................................16
Load Transient Response (75% to 100% Load Step) .......................................17
Output Ripple Measurements............................................................................18
36 VDC Maximum and Nominal Load ...............................................................22
57 VDC Maximum Load ....................................................................................23
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