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NCL30083
(Rev.:2013_02)

Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting with Thermal Fold-back

ON Semiconductor 

NCL30083

Table 3. ELECTRICAL CHARACTERISTICS (Unless otherwise noted: For typical values TJ = 25°C, VCC = 12 V;

For min/max values TJ = −40°C to +125°C, Max TJ = 150°C, VCC = 12 V)

Description

Test Condition

Symbol

Min Typ

ZERO VOLTAGE DETECTION CIRCUIT

ZCD threshold voltage

ZCD threshold voltage (Note 4)

ZCD hysteresis (Note 4)

Threshold voltage for output short circuit or aux. winding

short circuit detection

VZCD increasing

VZCD decreasing

VZCD increasing

VZCD(THI)

25

45

VZCD(THD)

5

25

VZCD(HYS)

10

–

VZCD(short)

0.8

1

Short circuit detection Timer

Auto−recovery timer duration

Input clamp voltage

High state

Low state

Propagation Delay from valley detection to DRV high

Equivalent time constant for ZCD input (Note 4)

Blanking delay after on−time

Timeout after last demag transition

CONSTANT CURRENT CONTROL

VZCD < VZCD(short)

Ipin1 = 3.0 mA

Ipin1 = −2.0 mA

VZCD decreasing

tOVLD

trecovery

VCH

VCL

tDEM

tPAR

tBLANK

tTIMO

70

90

3

4

–

9.5

−0.9 −0.6

–

–

–

20

2.25

3

5

6.5

Reference Voltage at Tj = 25°C

Reference Voltage Tj = −40°C to 125°C

70% reference voltage

40% reference Voltage

25% reference Voltage

10% reference Voltage

5% reference Voltage

Current sense lower threshold for detection of the

leakage inductance reset time

VREF

VREF

VREF70

VREF40

VREF25

VREF10

VREF05

VCS(low)

245 250

242.5 250

–

175

–

100

–

62.5

–

25

–

12.5

30

55

LINE FEED−FORWARD

VVIN to ICS(offset) conversion ratio

Offset current maximum value

VREF value below which the offset current source is turned off

VREF value above which the offset current source is turned on

VALLEY SELECTION

VpinVIN = 4.5 V

VREF decreases

VREF increases

KLFF

Ioffset(MAX)

VREF(off)

VREF(on)

15

17

67.5 76.5

–

37.5

–

50

Threshold for line range detection Vin increasing

(1st to 2nd valley transition for VREF > 0.75 V)

Threshold for line range detection Vin decreasing

(2nd to 1st valley transition for VREF > 0.75 V)

Blanking time for line range detection

4. Guaranteed by design

5. OTP triggers when RNTC = 4.7 kW

VVIN increases

VVIN decreases

VHL

VLL

tHL(blank)

2.28 2.4

2.18 2.3

15

25

Max Unit

65 mV

45 mV

–

mV

1.2

V

110 ms

5

s

V

–

−0.3

150 ns

–

ns

3.75 ms

8

ms

255 mV

257.5 mV

–

mV

–

mV

–

mV

–

mV

–

mV

80 mV

19 mA/V

85.5 mA

–

mV

–

mV

2.52 V

2.42 V

35 ms

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