SSL4101T datasheet(24/29 Pages) NXP

24 / 29 page

SSL4101T

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1 — 21 April 2011

24 of 29

NXP Semiconductors

SSL4101T

GreenChip III+ SMPS control IC

11. Application information

A power supply with the SSL4101T consists of a power factor correction circuit followed

by a flyback converter. See Figure 14.

Capacitor CVCC buffers the IC supply voltage, which is powered via the high voltage

rectified mains during start-up and via the auxiliary winding of the flyback converter during

operation. Sense resistors RSENSE1 and RSENSE2 convert the current through the

MOSFETs S1 and S2 into a voltage at pins PFCSENSE and FBSENSE. The values of

RSENSE1 and RSENSE2 define the maximum primary peak current in MOSFETs S1 and S2.

In the example given, the LATCH pin is connected to a Negative Temperature Coefficient

(NTC) resistor. When the resistance drops below Equation 3 (typ), the protection is

activated.

(3)

A capacitor CTIMEOUT is connected to the FBCTRL pin. For a 120 nF capacitor, typically

after 10 ms the time-out protection is activated. RLOOP is added so that the time-out

capacitor does not interfere with the normal regulation loop.

RS1 and RS2 are added to prevent the soft start capacitors from being charged during

normal operation due to negative voltage spikes across the sense resistors.

Resistor RAUX1 is added to protect the IC from damage during lightning events.

Fig 15. Typical application diagram SSL4101T

prot LATCH

()

OLATCH

()

-------------------------------

15.6 k

9 16 13

SSL4101T

014aaa302

RS2

RSS2

CSS2

COUT

RAUX2

RSENSE2

CVCC

RS1

Cbus

CSS1

RSS1

RSENSE1

CTIMEOUT

RLOOP

COMPENSATION

RAUX1

SSL4101T датащи(PDF) 24 Page - NXP Semiconductors

SSL4101T датащи(HTML) 24 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

датащи скачать

ссылки URL