DAK-68A Power Integrations, DAK-68A Datasheet - Page 11

• 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

Typical Uses of FREQUENCY (F) Pin
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins
Figure 11. Three Terminal Operation (LINE-SENSE and EXTERNAL CURRENT
Figure 13. Line-Sensing for Under-Voltage Only (Overvoltage Disabled).
Figure 9.
www.powerint.com
Voltage
Voltage
Input
Voltage
Input
DC
Input
DC
LIMIT Features Disabled. FREQUENCY Pin can be tied to SOURCE or
CONTROL Pin).
400 kHz Frequency Operation.
+
DC
+
-
+
-
-
15 V
D
S
D
S
D
S
CONTROL
CONTROL
CONTROL
L
X
464 kΩ
1%
150 kΩ
1%
L
F
F
C
C
C
R
LS
V
For Values Shown
UV
V
UV
C
C L X S F
= R
= 33.1 V
V
PI-2852-121504
S
PI-2766-070901
LS
L (I
PI-2654-071700
L
x I
= I
UV
D
D
UV
)
+
Figure 12. Line-Sensing for Under-Voltage, Overvoltage and Line Feed-forward.
Figure 10. 300 kHz Frequency Operation.
Figure 14. Line-Sensing for Overvoltage Only (Under-Voltage Disabled).
Voltage
Voltage
Voltage
Input
Input
Input
DC
DC
DC
Maximum Duty Cycle will be reduced at Low Line.
+
+
+
-
-
-
D
S
R
D
S
D
S
LS
CONTROL
R
CONTROL
CONTROL
LS
L
L
619 kΩ
1%
590 kΩ
1%
30 kΩ
1%
DPA422-426
V
V
F
UV
OV
= I
= I
C
C
C
UV
OV
x R
For R
x R
1N4148
V
V
V
For Values Shown
UV
OV
LS
LS
OV
V
OV
LS
+ V
+ V
= 33.3 V
= 86.0 V
= I
= 619 k
= 86.2 V
V
OV
L (I
PI-2655-071700
L (I
PI-2767-091302
L (I
PI-2853-091302
L
L
x R
L
= I
= I
= I
Rev. S 12/07
UV
OV
LS
Ω
OV
)
)
11
+
)