IMX7/IMS7 DC-DC Series Data Sheet
7-Watt DC-DC Converters
®
Electrical Input Data
General conditions:
– TA = 25 °C, unless TC is specified.
– Connector pin i connected with Vi–.
– Trim or R input not connected.
Table 2a: Input data of IMX7
Input
20IMX7
40IMX7
70IMX7
110IMX7
Characteristics
Conditions
min typ max min typ max min typ max min typ max Unit
Vi
Input voltage range1
TC min – TC max
Io = 0 – Io nom
8.4
36 16.8 6
75
40
121 60
150
V
Vi nom Nominal input voltage
20
40
70
110
Vi sur
Repetitive surge voltage
abs. max input (3 s)
50 5
100
150
tstart up Converter 2
switch on
Worst case condition at
0.25 0.5
0.25 0.5
0.25 0.5
0.25 0.5
s
start-up time
Vi min and full load
inh. release
0.1
0.1
0.1
0.1
trise
Rise time 2
Vi nom
Io nom
resistive load
5
5
5
5
ms
capacitive load
12
12
12
12
Ii o
No load input current
Input capacitance
Inhibit voltage
Io = 0, Vi min – Vi max
(for surge calculation)
converter operating
converter inhibited
15
30
8
15
8
15
8
15
mA
μF
V
Ci
4.7
0.5
0.2
0.2
Vinh
–10
2.4
+0.8 –10
+0.8 –10
+0.8 –10
+0.8
Vi max 2.4
Vi max 2.4
Vi max 2.4
Vi max
or open
–0.5
1
or open
–0.5
1
or open
–0.5
1
or open
–0.5
1
Iinh
Inhibit current
converter operating
converter inhibited
Vi min – Vi max
mA
Ii inh
Input current when the
converter is inhibited
3
3
3
3
4
Iinr p
fs
Inrush peak current
Vi = Vi nom
3.8
3.7
4.2
5.6
A
Switching frequency
Vi min – Vi max, Io = 0 – Io nom
Io = 0 – Io nom
approx. 400
50
approx. 400
30
approx. 400
20
approx. 300
kHz
Ii rr
Reflected ripple current
Input RFI level conducted
10 mApp
Vi RFI
EN 55022 3
B
B
B
B
1
Vi min will not be as stated, if Vo is increased above Vo nom by use of the R or Trim input. If the output voltage is set to a higher value, Vi min
will be proportionally increased.
Measured with a resistive and the max. admissible capacitive load.
2
3
Measured with a lead length of 0.1 m, leads twisted. Double-output models with both outputs in parallel. 70/110 IMX7 models need an
external capacitor at the input, e.g., 1 μF film or ceramic.
4
5
6
Source impedance according to ETS 300132-2, version 4.3, at Vi nom
.
The DC-DC converter shuts down automatically at approx. 38 V.
Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V.
Vo
trise
04008a
Vo nom
t
tstart up
Fig. 3
Converter start-up and rise time
BCD20007-G Rev AD, 4-Nov-09
Page 4 of 15
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