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ADP1032 specification

Hi, everyone.

I have question on datasheet of ADP1032.

As it is written,
Specification of datasheet is
VINP voltage (VINP) = 24 V and ambient temperature (TA) = 25°C for typical specifications.
Minimum and maximum specifications apply over the entire operating range of 4.5 V ≤ VINP ≤ 60 V and −40°C ≤ TJ ≤ +125°C, unless otherwise noted.

Accordingly, the minimum value of Current-Limit Threshold (ILIM(FLYBACK)) without note is 400 mA, the typical value is 440 mA, and the maximum value is 480 mA.

I design board expecting 400 mA from VINP of 5V ~ 12V, but it does not work.

I think figures 4 and 7 appear to have low IOUT limitations in VINP of 5V.

I wonder ADP1032 does work that I expect, or not.

Sincery,
JaeKyung.

  • Hi JaeKyung,

    The ILim(flyback) specs are the current limit on the flyback primary side switch not the specs of the output current thus the with lower supply voltage (means lower input power) will give you lower output power as shown in figure 4 and 7. Increasing the supply voltage will provide more output power thus having higher output current shown in the plots.

    Apologies for the late response, I was out for the holidays. Happy new year!

    Thanks and regards,

    Jefferson