
BCD20009-G Rev AA
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IMX35 Series Data Sheet
35-Watt Quad-Output DC-DC Converters
Electrical Input Data
General conditions:
TA = 25°C, shut down and Trim pin left open-circuit (not connected), unless specified.
Table 2: Input Data
Input
20IMX
40 I MX
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vi
Input voltage range 1
TA min to TA max
9 2
36
18 2
75
VDC
Vi nom
Nominal input voltage
Io = 0 to Io nom
20
40
Vi sur
Repetitive surge voltage
Abs. max input (3 s)
40
100
tstart up
Converter
Switch on
Worst case condition at
0.25
0.5
0.25
0.5
s
start-up time 2
SD high
Vi min and full load
0.1
trise
Rise time 3
Vi nom resist load
3
ms
Io nom capac. load
6
12
6
12
Ii o
No load input current
Io = 0, Vi min to Vi max
70
50
mA
Iirr
Reflected ripple current
Io = 0 to Io nom
30
mApp
Iinr p
Inrush peak current 4
Vi = Vi nom
89
A
C i
Input capacitance
for surge calculation
2
1.3
F
VS–D–
Shut down voltage
Converter shut down
–10 to 0.7
VDC
Converter operating
open circuit or 2 to 20
RS–D–
Shut down input resistance
For current calculations
approx. 10
k
I S–D–
Input current at shut down
Vi min to Vi max
12
6
mA
fs
Switching frequency
Vi min to Vi max, Io = 0 to Io nom
approx. 220
kHz
Input
70 IMX
110 IMX
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vi
Input voltage range 1
TA min to TA max
40 2
121
60 2
150
VDC
Vi nom
Nominal input voltage
Io = 0 to Io nom
70
110
Vi sur
Repetitive surge voltage
Abs. max input (3 s)
150
170
tstart up
Converter
Switch on
Worst case condition at
0.25
0.5
0.25
0.5
s
start-up time 2
SD high
Vi min and full load
0.1
t rise
Rise time 3
Vi nom resist load
3
ms
Io nom capac. load
6
12
6
12
Ii o
No load input current
Io = 0, Vi min to Vi max
30
20
mA
Iirr
Reflected ripple current
Io = 0 to Io nom
30
mApp
Iinr p
Inrush peak current 4
Vi = Vi nom
77
A
C i
Input capacitance
for surge calculation
0.5
F
VS–D–
Shut down voltage
Converter shut down
–10 to 0.7
VDC
Converter operating
open circuit or 2 to 20
RS–D–
Shut down input resistance
For current calculations
approx. 10
k
I S–D–
Input current at shut down
Vi min to Vi max
3.5
4
mA
fs
Switching frequency
Vi min to Vi max, Io = 0 to Io nom
approx. 220
kHz
1 Vi min will not be as stated if Vo is increased above Vo nom by use of Trim input. If the output voltage is set to a higher value, Vi min will
be proportionately increased.
2 Input undervoltage lockout at typ. 85% of Vi min.
3 Measured with resistive and max. admissible capacitive load.
4 Source impedance according to ETS 300132-2, version 4.3.
5 Measured with a lead length of 0.1 m, leads twisted.