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SPM1006 Datasheet(PDF) 17 Page - Sumida Corporation

Part No. SPM1006
Description  4-28V Input 8A Output Power Supply in Inductor (PSI2) Module
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Maker  SUMIDA [Sumida Corporation]
Homepage  http://www.sumida.com
Logo SUMIDA - Sumida Corporation

SPM1006 Datasheet(HTML) 17 Page - Sumida Corporation

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Version 1.5
March 16, 2016
Page 17 of 22
Fig. 26 Overcurrent protection (hiccup mode)
Fig. 27 Recovery from overcurrent
Input protection
In most applications the input power source provides current limiting (typically fold-back or hiccup mode) and as long
as the average fault current is limited to approximately 10A or less, no further protection is required.
If the SPM1006 is powered from a battery or other high current source, it is recommended to include an external fuse
(maximum 10A) in the input to the module. The SPM1006 includes full protection against output overcurrent or short-
circuit, and the fuse will not operate under any output overload condition. For more information refer to PM_AN-2
“Input Protection”.
Thermal Considerations
The maximum continuous current rating depends on the ambient temperature, input voltage and output voltage as
shown in Fig. 28, Fig. 29 and Fig. 30. Output current can exceed these values for short periods, as long as the average
does not exceed the derating curve. The peak current duration is limited by the thermal time constant, typically in the
order of 60 seconds in most applications.
The maximum rating is also influenced by the PCB layout; thermal performance can be improved by using more copper
on the motherboard. The derating shown in these curves is measured using the Sumida Evaluation Module (EVM)
layout. Derating also depends on airflow; these curves are based on data measured under natural convection (no
forced air).
Fig. 28 Output current derating (6.5V input)
Fig. 29 Output current derating (12V input)

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