20IMX15-15-15-8G POWER ONE, 20IMX15-15-15-8G Datasheet - Page 7

• Manufacturer Part Number: 20IMX15-15-15-8G
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of 20IMX15-15-15-8G

• Output Current: 0.5(Typ) A
• Output Voltage: 15 V
• Input Voltage: 20 V
• Number Of Outputs: 2
• Output Power: 15(Typ) W
• Switching Regulator: Yes

Inrush Current
The inrush current has been made as low as possible by
choosing a very small input capacitance. A series resistor may
be installed in the input line to further reduce this current.
Fig. 4
Typical inrush current at V
(40IMX15). Source impedance according to
ETS 300132-2 at V
Fig. 5
Converter start-up and rise time
Input Undervoltage Lockout
A special feature of these converters is the accurate
undervoltage lockout protection, which protects against large
currents caused by operation at low voltages. This ensures
easier start-up in distributed power systems.
Fuse and Reverse Polarity Protection
The built-in suppressor diode also provides for reverse polarity
protection at the input by conducting current in the reverse
direction. An external fuse is required to limit this current.
BCD20008-G Rev AB, 26-Feb-09
Tab. 3: Turn on and turn off voltage
V
Model
20IMX15
24IMS15
40IMX15
48IMS15
110IMY15
3
2
1
4
o nom
A
V
0
o
20
12.5
12.5
31.5
min
7.5
40
t
startup
Turn on
i nom
40
.
t
®
rise
max
13.5
13.5
32.5
42.5
i nom
8
, P
60
o nom
min
12
12
31
38
7
04008b
Turn off
versus time
80
t
max
40.5
7.5
13
13
32
04022b
100 µs
IMX15/IMS15/ IMY15 DC-DC Series Data Sheet
Unit
t
V
Page 7 of 20
Table 4: Recommended external fuses
Input Transient Voltage Protection
A built-in suppressor diode provides effective protection
against input transients, which typically occur in many
installations.
Table 5: Built-in transient voltage suppressor
For very high energy transients as for example to achieve
compliance to IEC/EN 61000-4-5 or ETR 283 (see table
Electromagnetic Immunity), an external inductor and a
capacitor are required, see Fig. 6. The components should
have similar characteristics as listed in table 6.
Fig. 6
Example for external circuitry to achieve better transient
immunity. The diode D is only necessary for 20IMX15
models.
Table 6:
Components for external circuitry for IEC/EN 61000-4-5,
level 3, or ETR 283 (19Pfl1) compliance.
Model
20IMX15
24IMS15
40IMX15, 48IMS15
110IMY15
Type
20IMX15
24IMS15
40IMX15
48IMS15
110IMY15
110IMY15
Model
20IMX15
24IMS15
40IMX15
48IMS15
150 μH, 1.3 A
220 μH, 1.3 A
330 μH, 0.4 A
Inductor (L)
68 μH, 2.7 A
150 μH, 1 A
L
Breakdown
V
voltage
Br nom
15 -Watt DC-DC Converters
100
100
168
53
40
C
+
[V]
2 x 100 μF, 100 V
2 x 100 μF, 200 V
Capacitor (C)
100 μF, 100 V
Peak power
330 μF, 63 V
150 μF, 63 V
D
at 1 ms
P
Fuse type
1500
1500
F 3.15 A
p
600
600
600
F 4.0 A
F 2.0 A
F 1.0 A
[W]
Vi+
Vi–
www.power-one.com
04036a
Peak pulse
1.5 k E47A
current
Diode (D)
I
pp
7.7
9.7
4.1
0.5
22
[A]
-
-
-
-