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Advanced Data Sheet: Veta
iHA48060A012V*, 1.2V/60A Output Half Brick
Series
©2007
TDK Innoveta Inc.
iHA Datasheet 040207
'
(877) 498
-
0099
14
/
16
percentage of Vout (%Vo) from Vo,nom, the
trim resistor should be chosen according to
the following equation:
1.0
1
968.0
−
−
=
Vdown
Vnom
Rdown
kΩ
The current limit set point does not increase
as the module is trimmed down, so the
available output power is reduced.
Sense(-)
Trim
Sense(+)
Vout(+)
Rup
Vout(-)
Circuit to increase output voltage
With a resistor between the trim and sense (+)
terminals, the output voltage is adjusted up.
To adjust the output voltage up a percentage
of Vout (%Vo) from Vo,nom the trim resistor
should be chosen according to the following
equation:
1.0
)(
)968.0(
−
−
×
−
=
VnomVupVref
VrefVnomVup
Rup
kΩ
The value of Vref is found in the Electrical
Data section for the power module of interest.
Trim up and trim down curves are found in the
Electrical Characteristics section for the power
module of interest.
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.
As the output voltage is trimmed, the output
over-voltage 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(+) terminal should be
connected to the Vo(+) terminal and the
Sense (-) terminal should be connected to the
Vo(-) terminal. 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 output
current must be decreased for the power
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. 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, a 200-1000uF
input electrolytic capacitor should be present.