DAK-71A Power Integrations, DAK-71A Datasheet - Page 11

• Manufacturer Part Number: DAK-71A
• Description: KIT DESIGN ACCELERATOR DC-DC
• Manufacturer: Power Integrations
• Series: DPA-Switch®r

Specifications of DAK-71A

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 2A
• Voltage - Input: 36 ~ 72V
• 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
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 596-1009

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.
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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
+
)