IMX35 Series Data Sheet
35 Watt Quad-Output DC-DC Converters
®
Progr. Input Undervoltage Lockout PUL
A special feature of the converters (with Rev. BA or later) is the
adjustable undervoltage lockout protection, which protects
the converter (and the system) from high current caused by
operation at low input voltages. This ensures easier start-up
in distributed power systems.
The table below shows the band of switch on/off and the
hysteresis.
Table 9: Trigger level and hysteresis (pin 1 left open)
Model
Trigger level
7 to 8
Hysteresis
Unit
20IMX35
40IMX35
70IMX35
110IMX35
<0.5
<1
V
14 to 15.5
31 to 34
<3
42 to 50
<8
The undervoltage lockout levels may be programmed by using
an external resistor RPUL between PUL and Vi– to increase the
preset levels as specified in table 10.
Table 10: Typical values for RPUL and the respective lockout
voltage for input voltage.
20IMX35
40IMX35
RPUL [kW]
Vi min [V]
RPUL [kW]
Vi min [V]
∞
39
19
13
9.1
≤ 8
10
12
14
16
∞
43
16
10
0
≤ 15.5
22
26
28
32
70IMX35
110IMX35
RPUL [kW]
Vi min [V]
RPUL [kW]
Vi min [V]
∞
270
110
80
31
40
50
55
∞
42
50
60
75
270
120
51
BCD20009-G Rev AC, 06-May-2013
Page 10 of 15
POWER-ONE [ POWER-ONE ]
