SSL8516T datasheet(18/33 Pages) NXP

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SSL8516T

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Product data sheet

Rev. 1 — 5 May 2014

18 of 33

NXP Semiconductors

SSL8516T

Greenchip PFC and flyback controller

7.3.10 Overpower protection

During the flyback converter primary stroke, the flyback converter input voltage is

measured by sensing the current that is drawn from the FBAUX pin.

The current information is used to limit the maximum flyback converter peak current and is

measured using the FBSENSE pin. The internal compensation is such, that a maximum

output power is obtained which is almost independent of the PFC output voltage.

The OPP curve is given in Figure 15.

7.3.11 Driver (FBDRIVER pin)

The driver circuit for the external power MOSFET gate includes a current sourcing

capability of 500 mA at 2 V on the FBDRIVER pin. It also includes a current sink capability

of 1.2 A at 10 V on the FBDRIVER pin. These capabilities ensure fast switch-on and

switch-off of the power MOSFET for efficient operation.

Fig 14. OCP leading-edge blanking

Fig 15. Overpower protection curve

SSL8516T Datasheet(PDF) 18 Page - NXP Semiconductors