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BCD.00002 Rev AA, 3-Feb-2010
Page 15 of 15
www.power-one.com
IMX70, IMY70 Series Data Sheet
70 Watt DC-DC Converters
NUCLEAR AND MEDICALAPPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components
in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective
divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
Table 15: Electric strength test voltages
Characteristic
Input to
Outputs to
Between
Unit
(outputs+case)
case
outputs
20/40IMX70 1
110IMY70 1
all models1
all models
Factory test >1 s
1.2
3
0.5
0.152
kVAC
Equivalent DC voltage
1.7
4.2
0.7
0.22
kVDC
Insulation resistance
>100
–
M
Ω
at 500 VDC
1
For open-frame models (option Z), only the insulation input to outputs is tested.
2
The test voltage between outputs is not applied as routine test. For higher isolation between outputs, contact Power-One.
Options
Option i: Inhibit (Negative Shutdown Logic)
The output of the converter may be enabled or disabled by
means of a logic signal (TTL, CMOS, etc.) applied to the
inhibit pin 8. No output voltage overshoot will occur, when the
converter is turned on. If the inhibit function is not required the
inhibit pin 8 should be connected to Vi– to enable the output
(active low logic, fail safe). Voltage on pin 8:
Converter operating:
–10 V to +0.8 V
Converter disabled:
2.4 V to 20 V
Fig. 16
If the inhibit function is not used, the inhibit pin should be
connected to Vi–.
Vi+
Vi–
i
06138a
4
8
2
Option T
This option is available for single-output models only. Several
parallel connected converters will share their current evenly
by interconnecting the T pins (pin 11).
Note: Option T allows for connecting the outputs together through
ORing diodes to achieve redundancy. We recommend Schottky
diodes mounted onto the same heat sink (for thermal balancing).
Option Z
If the converters are mounted onto a mother board, in many
cases, a converter case is not required. Only converters with
option Z are not varnished, and this allows dipping of the
populated board including the converter into a protection
lacquer.
Note: The converters shall not be exposed to cleaning processes, as
this will damage the glue of the ferrite cores.
Option G
Converters with a type designation ending by G are RoHS-
compliant for all six substances.
Isolation
The electric strength test is performed in the factory as a
routine test in accordance with EN 50116, IEC/EN 60950-1,
and UL/CSA 60950-1, and should not be repeated in the field.
Power-One will not honor any warranty claims resulting from
electric strength field tests.