AN10881
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Application note
Rev. 2 — 26 September 2011
82 of 102
NXP Semiconductors
AN10881
TEA1713 resonant power supply control IC with PFC
11.1.4 Grounding layout example
11.1.5 Miscellaneous
11.1.5.1
Connecting SNSCURHBC (pin 17)
Place a series resistor in the SNSCURHBC connection as close as possible to pin 17.
This is important for avoiding disturbance pickup. Also avoid capacitive coupling between
the connection to pin 17 and the HB track (to pin 15) that contains high dV/dt signals.
11.1.5.2
CFMIN (pin 19) and RFMAX (pin 20)
Connect the oscillator capacitor on CFMIN from pin 19 to SGND pin 18 with short tracks to
prevent pickup of disturbances by an external field. Although less critical, a similar
construction can be used for RFMAX.
Fig 57. Grounding layout example with star point at the boost capacitor
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