UBA2015AP datasheet(11/42 Pages) PHILIPS

11 / 42 page

UBA2016A_15_15A

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Objective data sheet

Rev. 1 — 20 May 2011

11 of 42

NXP Semiconductors

UBA2016A/15/15A

600 V fluorescent lamp driver

Fig 9.

State diagram

reset OR disable

VDD high AND

enable AND

NOT(overtemp)

GLHB AND

(reset OR disable)

GLHB AND

(VDD low

OR overtemp)

reset

restart

NOT(reset)

Preheat time completed

f low OR

ignition detected

001aam538

Non oscillating states

(IC is off)

Low power consumption

GHHB and GPFC low

Oscillating states

(IC is on)

Reset state

GLHB low

stop latch and ignition

attempt counter are reset

Preheat state

BOOST and EOL disabled

frequency is decreased

until HB preheat current or

the set value for the

preheat frequency

(UBA2015(A) only) is reached

Power on

Standby state

GLHB high

Stop state

GLHB low

fast fault

fault timeout

Other definitions:

enable = (VFFPRHT > Vth(en)(FFPRHT))

disable = NOT(enable)

ignition detected = (VIFB > Vth(lod)(IFB)) AND (VVFB < Vth(lod)(VFB))

Auto-restart

state

GLHB low

Ignition state

BOOST and EOL disabled

frequency is decreased

as long as no lamp overvoltage

or HB overcurrent or

hardswitching(1) is detected

(1)(UBA2016(A) only)

Burn state

ignition attempt counter is reset

BOOST function enabled

EOL protection enabled

Frequency determined by lamp

current regulation loop

fault timeout

AND

(ignition attempts = 1)

fault definitions:

overtemp =

fast fault =

slow fault =

the fault timer is started by slow fault and runs as

long as slow fault continues. NOT(slow fault) resets

the fault timer.

(1)(except for UBA2016A in IGNITION state after ZVS

has been seen)

(2)(BURN state only)

{set} T > Tth(act)otp

{reset} T < Tth(rel)otp

over voltage extra OR

capacitive mode(1) OR

(over current lamp AND f high)

coil saturation(2)

CPT low OR

VFB low OR

NOT(PFC OK) OR

over voltage OR

(over voltage end of life AND

NOT (deep dimming))(2) OR

coil saturation OR

hardswitching OR

brownout OR

asymetrical end of life(2)

fault timeout

AND

(ignition attempts = 2)

Supply voltage definitions

reset = (VDD < Vrst(VDD))

restart = (VDD < Vrestart(VDD))

VDD low = (VDD < Vstop(VDD))

VDD high = (VDD > Vstartup(VDD))

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