SSL1750T/N1,518【PDF 22/29 页】IC LED DRVR HI PWR AC IN 16-SOIC

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NXP Semiconductors

SSL1750

SMPS control IC for LED drivers

Table 5. Characteristics …continued

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

positive when ?owing into the IC; unless otherwise speci?ed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Pulse width modulator PFC

t on(PFC)

PFC on-time

V VINSENSE = 3.3 V,

3.6

4.5

5.0

μ s

V PFCCOMP = V ton(max)(PFC)

V VINSENSE = 0.9 V,

30

40

53

μ s

V PFCCOMP = V ton(max)(PFC)

Output voltage sensing PFC (pin VOSENSE)

V th(ol)(VOSENSE)

open-loop threshold voltage

0.35

0.40

0.45

V

on pin VOSENSE

V start(fb)

V stop(fb)

V burst(L)

?yback start voltage

?yback stop voltage

LOW-level burst mode

[2]

-

1.55

1.87

1.72

1.60

1.92

-

1.65

1.97

V

V

V

voltage

V burst(H)

HIGH-level burst mode

2.19

2.24

2.29

V

voltage

V reg(VOSENSE)

regulation voltage on pin

I O(PFCCOMP) = 0 A

2.475

2.500

2.525

V

VOSENSE

V ovp(VOSENSE)

overvoltage protection

2.60

2.63

2.67

V

voltage on pin VOSENSE

I I(VOSENSE)

input current on pin

V VOSENSE = 2.5 V

5

45

100

nA

VOSENSE

Overcurrent protection PFC (pin PFCSENSE)

V sense(PFC)max

t leb(PFC)

maximum PFC sense

voltage

PFC leading edge blanking

? V/ ? t = 50 mV/ μ s

? V/ ? t = 200 mV/ μ s

0.49

0.51

250

0.52

0.54

310

0.55

0.57

370

V

V

ns

time

I prot(PFCSENSE)

protection current on pin

? 50

-

? 5

nA

PFCSENSE

Soft start, soft stop PFC (pin PFCSENSE)

I start(soft)PFC

V start(soft)PFC

V stop(soft)PFC

R start(soft)PFC

PFC soft start current

PFC soft start voltage

PFC soft stop voltage

PFC soft start resistance

? 75

0.46

0.42

12

? 60

0.50

0.45

-

? 45

0.54

0.48

-

μ A

V

V

k ?

Oscillator PFC

f sw(PFC)max

maximum PFC switching

100

125

150

kHz

frequency

t off(PFC)min

minimum PFC off-time

1.1

1.4

1.7

μ s

Valley switching PFC (pin PFCAUX)

( ? V/ ? t) vrec(PFC)

PFC valley recognition

-

-

1.7

V/ μ s

voltage change with time

t vrec(PFC)

t to(vrec)PFC

PFC valley recognition time

PFC valley recognition

V PFCAUX = 1 V peak-peak

demagnetization to ? V/ ? t = 0

[3]

[4]

-

-

3

-

-

4

300

50

6

ns

ns

μ s

time-out time

SSL1750_1

? NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 15 September 2008

22 of 29

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