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HMA423R409T Datasheet(PDF) 5 Page - International Rectifier

Part # HMA423R409T
Description  HIGH RELIABILITY DC-DC CONVERTER
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

HMA423R409T Datasheet(HTML) 5 Page - International Rectifier

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HMA423R409T/ES
Notes. Electrical Performance Characteristics
1)
Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall be
guaranteed to the limits specified.
2)
Parameter verified during line and load regulation tests.
3)
Although operation with no load is permissible, light loading on the main (+3.4V) output may cause the output
voltage of the auxiliary outputs (±9.2V) to drop out of regulation. It is therefore recommended that at least 450
mA or 10 percent of the total output power, whichever is greater, be taken from the main (+3.4V) output.
4)
Although operation with no load is permissible, heavy loading on the main (+3.4V) output may cause the output
voltage of the auxiliary outputs (±9.2V) to rise out of regulation. It is therefore recommended that at least 20
percent of the total output power, whichever is greater, be taken from the auxiliary (±9.2V) outputs.
5)
Unless otherwise specified, “Rated” load is 15.3W on the main (+3.4V) output, 21.16W on the +9.2V output and
10.58W on the -9.2V output. Load currents of up to 6.0A on the 3.4V output, 2.3A on the +9.2V and 1.15A on
the -9.2V output are acceptable as long as the total output power does not to exceed 50W.
6)
Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth using the circuit shown
on next page.
7)
Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.
A capacitive load in excess of the maximum limit may interfere with the proper operation of the converter’s
overload protection, causing erratic behavior during turn-on.
8)
Overload power dissipation is defined as the device power dissipation with the load set such that V
OUT = 90% of
nominal.
9)
Load step transition time
≤ 10 µsec.
10) Recovery time is measured from the initiation of the transient to where V
OUT has returned to within ±1% of its
steady state value.
11) The worst case loading condition is min load on the main (+3.4V) output and max load on the auxiliary (±9.2V)
outputs. In this case, the ±9.2V output can be drop down to 7.9V.
12) Turn-on delay time from either a step application of input power or a logic low to a logic high transition on the inhibit
pin (pin 3) to the point where V
OUT = 90% of nominal.
13)
Load is varied for output under test while the remaining outputs are loaded at 50% of rated. Regulation relative
to output voltage at 50% rated load.


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