Datasheet

NCL30081
http://onsemi.com
6
Table 3. ELECTRICAL CHARACTERISTICS (Unless otherwise noted: For typical values T
J
= 25°C, V
CC
= 12 V;
For min/max values T
J
= −40°C to +125°C, Max T
J
= 150°C, V
CC
= 12 V)
Description UnitMaxTypMinSymbolTest Condition
ZERO VOLTAGE DETECTION CIRCUIT
ZCD threshold voltage V
ZCD
increasing V
ZCD(THI)
25 45 65 mV
ZCD threshold voltage (Note 4) V
ZCD
decreasing V
ZCD(THD)
5 25 45 mV
ZCD hysteresis (Note 4) V
ZCD
increasing V
ZCD(HYS)
10 – – mV
Threshold voltage for output short circuit or aux. winding
short circuit detection
V
ZCD(short)
0.8 1 1.2 V
Short circuit detection Timer V
ZCD
< V
ZCD(short)
t
OVLD
70 90 110 ms
Auto−recovery timer duration t
recovery
3 4 5 s
Input clamp voltage
High state
Low state
I
pin1
= 3.0 mA
I
pin1
= −2.0 mA
V
CH
V
CL
–
−0.9
9.5
−0.6
–
−0.3
V
Propagation Delay from valley detection to DRV high V
ZCD
decreasing t
DEM
– – 150 ns
Equivalent time constant for ZCD input (Note 4) t
PAR
– 20 – ns
Blanking delay after on−time t
BLANK
2.25 3 3.75
ms
Timeout after last demag transition t
TIMO
5 6.5 8
ms
CONSTANT CURRENT CONTROL
Reference Voltage at T
j
= 25°C V
REF
245 250 255 mV
Reference Voltage T
j
= −40°C to 125°C V
REF
242.5 250 257.5 mV
70% reference voltage V
REF50
– 175 – mV
40% reference voltage V
REF50
– 100 – mV
25% reference voltage V
REF50
– 62.5 – mV
10% reference voltage V
REF50
– 25 – mV
5% reference voltage V
REF50
– 12.5 – mV
Current sense lower threshold for detection of the
leakage inductance reset time
V
CS(low)
30 55 80 mV
LINE FEED−FORWARD
V
VIN
to I
CS(offset)
conversion ratio K
LFF
15 17 19
mA/V
Offset current maximum value V
pinVIN
= 4.5 V I
offset(MAX)
67.5 76.5 85.5
mA
V
REF
value below which the offset current source is turned off V
REF
decreases V
REF(off)
– 15 – mV
V
REF
value above which the offset current source is turned on V
REF
increases V
REF(on)
– 20 – mV
VALLEY SELECTION
Threshold for line range detection V
in
increasing
(1
st
to 2
nd
valley transition for V
REF
> 0.75 V)
V
VIN
increases V
HL
2.28 2.4 2.52 V
Threshold for line range detection V
in
decreasing
(2
nd
to 1
st
valley transition for V
REF
> 0.75 V)
V
VIN
decreases V
LL
2.18 2.3 2.42 V
Blanking time for line range detection t
HL(blank)
15 25 35 ms
4. Guaranteed by design