dpa422 Power Integrations, Inc., dpa422 Datasheet - Page 26

• Manufacturer Part Number: dpa422
• Description: Highly Integrated Dc-dc Converter Ics For Power Over Ethernet & Telecom Applications
• Manufacturer: Power Integrations, Inc.

Rev. S 12/07
Figure 33. DPA-Switch General Test Circuit.
26
Figure 31. CONTROL Pin I-V Characteristic.
DPA422-426
120
100
80
60
40
20
0
NOTE: This test circuit is not applicable for current limit or output characteristic measurements.
0
Impedance
Dynamic
40 V
0-15 V
CONTROL Pin Voltage (V)
S1
2
=
Slope
1
4
470 Ω
Figure 30. Duty Cycle Measurement.
VOLTAGE
6
DRAIN
470 Ω
5 W
S2
47 μF
0 V
HV
8
90%
5-50 V
10
0.1 μF
0-200 kΩ
t 1
10%
t 2
Figure 32. Typical Drain Operation Current Envelope.
S4
1.4
1.2
0.8
0.6
0.4
0.2
D =
1
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
t 1
t 2
C
0-70 kΩ
PI-2039-033001
90%
CONTROL
S3
L
F
t
t
LEB
IL(D)
Temperature Range:
-40 °C to 125 °C
X
(Blanking Time) +
(Current Limit Delay)
Time (μs)
C
D
S
DPA-Switch
www.powerint.com
PI-2860-050602