SSL4120T datasheet(9/47 Pages) NXP

9 / 47 page

SSL4120T

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

Objective data sheet

Rev. 1 — 21 June 2012

9 of 47

NXP Semiconductors

SSL4120T

Resonant power supply control IC with PFC

Fig 3.

Flow diagram of the SSL4120T

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

Table 3.

Operating states

State

Description

No supply

Supply voltages on SUPIC and SUPHV are too low to provide any functionality. Undervoltage

protection (UVP-supplies; see Section 7.9) is active when VSUPHV <Vrst(SUPHV) and

VSUPIC <Vrst(SUPIC). The IC is reset.

Disabled IC

IC is completely disabled because pin SSHBC/EN is LOW.

Thermal hold

Activated as long as OTP is active. IC is not operating. PFC and HBC controllers are disabled

and CSUPIC and CSUPREG are not charged.

SUPIC charge

IC supply capacitor (CSUPIC) is charged by HV start-up source. CSUPREG is not charged.

SUPREG charge

Stabilized supply capacitor (CSUPREG) is charged by series regulator.

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