SSL4120 datasheet(10/48 Pages) NXP

10 / 48 page

SSL4120

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Product data sheet

Rev. 2 — 1 November 2012

10 of 48

NXP Semiconductors

SSL4120

Resonant power supply controller IC with PFC for LED lighting

Fig 3.

SSL4120 flow diagram

NO SUPPLY

-All off

UVP supplies = no

UVP supplies = yes

DISABLED lC

-Only "Enable lC" detection active

Enable PFC = yes

THERMAL HOLD

-Minimum functionality active

OTP = no

SUPIC CHARGE

-HV start-up source on

UVP SUPIC = no

OTP = yes

STATE NAME

Explanation flow diagram symbols

-action 1

-action 2

-...

Disabled items are not mentioned

exit condition 1

reached

exit condition 2

reached

SUPREG CHARGE

-HV start-up source on

-Series stabilizer on

UVP SUPREG = no

OTP = yes

UVP SUPIC= yes

BOOST CHARGE

-HV start-up source on

-Series stabilizer on

-PFC on

UVP boost = no &

Enable lC = yes

SCP boost = yes

UVP SUPIC = yes

OTP = yes

UVP SUPREG = yes

OPERATIONAL SUPPLY

-Series stabilizer on

-PFC on

-HBC on

OVP output =yes

Protection timer

passed *1

-HV start-up source on

-Restart timer on

SCP boost = yes

UVP SUPREG = yes

UVP SUPIC = yes

OTP = yes

UVP boost = yes

or Enable IC = no

START

014aaa851

enable PFC = no

exit condition

next state can be entered

from any state when exit

condition is true

PROTECTION SHUTDOWN

Mains reset = yes

RESTART

Restart time passed

*1Protection timer is activated by:

-UVP output

-OLP HBC

-OCR HBC

-HFP

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