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L7987 Datasheet(PDF) 13 Page - STMicroelectronics

Part # L7987
Description  Adjustable current limitation
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7987 Datasheet(HTML) 13 Page - STMicroelectronics

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DocID025589 Rev 3
13/37
L7987
Functional description
37
In case two or more (up to five) L7987 SYNCH pins are tied together, the L7987 IC with
higher programmed switching frequency is typically the master device; however, the
SYNCH circuit is also able to synchronize with a slightly lower external frequency, so the
frequency pre-adjustment with the same resistor on the FSW pin, as suggested above, is
required for a proper operation.



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