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AN2983 Fiches technique(PDF) 23 Page - STMicroelectronics

No de pièce AN2983
Description  Constant current inverse buck LED driver using L6562A
PDF  32 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2983 Fiches technique(HTML) 23 Page - STMicroelectronics

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AN2983
Circuit description
Doc ID 15679 Rev 1
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resistor, Q3 turns off allowing C5 to charge through R6, and the voltage of the INV pin rises
again. When it reaches 0.45 V the disable condition is removed and the controller restarts.
If the short-circuit condition is removed, the circuit restores its normal functionality. If the
short-circuit condition persists, the hiccup cycle is repeated.
Figure 23.
Short-circuit application
Figure 24.
Short-circuit removal
Figure 25.
Short-circuit detection
Figure 26.
Load current decay



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