UBA20271 datasheet(21/33 Pages) PHILIPS

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UBA20271_UBA20272

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Product data sheet

Rev. 2.1 — 12 October 2011

21 of 33

NXP Semiconductors

UBA20271/2

350 V and 600 V Power ICs for dimmable compact fluorescent lamps

Vth(CB)min

minimum threshold

voltage on pin CB

1.1

Vth(CB)max

maximum threshold

voltage on pin CB

3.6

Vhys(CB)

hysteresis voltage on

pin CB

2.3

2.5

2.7

Tj(bp)bst

boost bypass junction

temperature

Tj sensed at end ignition time

C

Tj(end)bst

boost end junction

temperature

Tj during boost time

105

120

135

C

Idet(dis)bst

boost disable detection

current

VCB = 0 V

-30

-25

-20

A

tt(bst-burn)

transition time from

boost to burn

CCP = 470 nF; Tj < 80 C

3.6

Pin CSI

NLCBR

lamp current boost

ratio

VCSI in boost state versus

VCSI in burn state;

VDCI = 1.34 V

1.4

1.5

1.6

Coil saturation protection and overcurrent detection

Input: pin SLS

Vth(sat)SLS

saturation threshold

voltage on pin SLS

ignition state; RLSAT = 47 k

1.10

1.18

1.25

Vth(ocp)SLS

overcurrent protection

threshold voltage on

pin SLS

boost state and burn state;

RLSAT = 47 k

1.10

1.18

1.25

tleb

leading edge blanking

time

detection disabled first part of

GLS time

800

Io(sink)CI

sink output current on

pin CI

VCI = 2.0 V; ignition state;

Vi(SLS) > Vth(sat)SLS; cycle

clocked

A

Input: pin LSAT

Isource(LSAT)

source current on pin

LSAT

VLSAT = 1.2 V

26.3

25.0

23.7

A

Vclamp(LSAT)

clamp voltage on pin

LSAT

RLSAT = ;

2.3

2.5

2.7

Output: pin CF

I

o(sat)CF

saturation output

current difference on

pin CF

VCF = 1.5 V; ignition state;

low side switch = on

160

A

Table 5.

Characteristics …continued

VDD = 13 V; VFS - VHBO = 13 V; Tamb = 25 C; settings according to default setting in Table 6, all voltages referenced to GND,

positive currents flow into the IC, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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