SSL1750T datasheet(21/29 Pages) NXP

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SSL1750_1

Product data sheet

Rev. 01 — 15 September 2008

21 of 29

NXP Semiconductors

SSL1750

SMPS control IC for LED drivers

Supply voltage management (pin VCC)

Vtrip

trip voltage

0.55

0.65

0.75

Vstartup

start-up voltage

Vth(UVLO)

undervoltage lockout

threshold voltage

Vstart(hys)

hysteresis of start voltage

during start-up phase

300

Vhys

hysteresis voltage

Vstartup − Vth(UVLO)

6.3

7.7

Ich(low)

low charging current

VI on pin HV > 80 V; VCC <Vtrip or

Vth(UVLO) <VCC <Vstartup

−1.2

−1

−0.8

Ich(high)

high charging current

VI on pin HV > 80 V;

Vtrip <VCC <Vth(UVLO)

−6.3

−5.4

−4.6

ICC(oper)

operating supply current

no load on pin FBDRIVER and

PFCDRIVER

2.25

3.75

Input voltage sensing PFC (pin VINSENSE)

Vstop(VINSENSE)

stop voltage on pin

VINSENSE

0.86

0.89

0.92

Vstart(VINSENSE)

start voltage on pin

VINSENSE

1.11

1.15

1.19

∆Vpu(VINSENSE)

pull-up voltage difference on

pin VINSENSE

active after Vstop(VINSENSE) is

detected

−100

Ipu(VINSENSE)

pull-up current on pin

VINSENSE

active after Vstop(VINSENSE) is

detected

−55

−47

−40

µA

Vmvc(VINSENSE)max

maximum mains voltage

compensation voltage on pin

VINSENSE

4.0

Vﬂr

fast latch reset voltage

active after Vth(UVLO) is detected

0.75

Vﬂr(hys)

hysteresis of fast latch reset

voltage

0.12

II(VINSENSE)

input current on pin

VINSENSE

VVINSENSE >Vstop(VINSENSE) after

Vstart(VINSENSE) is detected

100

Loop compensation PFC(pin PFCCOMP)

transconductance

VVOSENSE to IO(PFCCOMP)

100

µA/V

IO(PFCCOMP)

output current on pin

PFCCOMP

VVOSENSE = 3.3 V

333945

µA

VVOSENSE = 2.0 V

−45

−39

−33

µA

Vclamp(PFCCOMP)

clamp voltage on pin

PFCCOMP

low power mode, PFC in burst

mode, lower clamp voltage

[1] 2.5

2.7

2.9

upper clamp voltage

[1] -

3.9

Vton(PFCCOMP)zero

zero on-time voltage on pin

PFCCOMP

3.4

3.5

3.6

Vton(PFCCOMP)max

maximum on-time voltage

on pin PFCCOMP

1.20

1.25

1.30

Table 5.

Characteristics …continued

Measurement data valid at Tamb =25 °C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are

positive when ﬂowing into the IC; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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