Data Sheet: SuperetaTM iQM Series –Single Output Quarter Brick
©2004-2006 TDK Innoveta Inc.
iQM 1.5V/70A Datasheet 8/4/2006
℡
(
877
)
498-0099 13/15
Sense(+)
Trim
Vout(-)
Sense(-)
Vout(+)
Rup
Circuit to increase output voltage
1
10
100
1000
0246810
% Increase in Output Voltage, ∆ (%)
Trim Resistance (k )
The value of Vref can be found in the
Electrical Data section of this data sheet.
The maximum power available from the
power module is fixed. As the output
voltage is trimmed up, the maximum output
current must be decreased to maintain the
maximum rated power of the module. It is
also desirable to slightly increase the input
voltage while trimming up the output with
heavy load current.
As the output voltage is trimmed up, the
output over-voltage protection set point is
not adjusted. Trimming the output voltage
too high may cause the output over voltage
protection circuit to be triggered.
Remote Sense: The power modules feature
remote sense to compensate for the effect
of output distribution drops. The output
voltage sense range defines the maximum
voltage allowed between the output power
terminals and output sense terminals, and it
is found on the electrical data page for the
power module of interest. If the remote
sense feature is not being used, the
Sense(+) pin should be connected to the
Vo(+) pin and the Sense (-) pin should be
connected to the Vo(-) pin.
The output voltage at the Vo(+) and Vo(-)
terminals can be increased by either the
remote sense or the output voltage
adjustment feature. The maximum voltage
increase allowed is the larger of the remote
sense range or the output voltage
adjustment range; it is not the sum of both.
As the output voltage increases due to the
use of the remote sense, the maximum load
current must be decreased for the module to
remain below its maximum power rating.
EMC Considerations: TDK Innoveta power
modules are designed for use in a wide
variety of systems and applications. With
the help of external EMI filters and careful
layout, it is possible to meet CISPR 22 class
A or B requirement. For assistance with
designing for EMC compliance, please
contact TDK Innoveta technical support.
Input Impedance: The source impedance
of the power feeding the DC/DC converter
module will interact with the DC/DC
converter. To minimize the interaction, one
or more 33-100uF/100V input electrolytic
capacitors should be present if the source
inductance is greater than 4uH.
Reliability:
The power modules are designed using TDK
Innoveta’s stringent design guidelines for
component derating, product qualification,
and design reviews. Early failures are
screened out by both burn-in and an
automated final test. The MTBF is
calculated to be greater than 2.64M hours at