NCP1339
www.onsemi.com
8
ELECTRICAL CHARACTERISTICS (V
CC
= 12 V, V
HV
= 120 V, V
Fault
= open, V
FB
= 3 V, V
CS
= 0 V, V
ZCD
= 0 V, C
VCC
= 100 nF ,
C
DRV
= 1 nF, for typical values T
J
= 25°C, for min/max values, T
J
is – 40°C to 125°C, unless otherwise noted)
Characteristics UnitMaxTypMinSymbolConditions
CURRENT SENSE
Abnormal Overcurrent Fault Threshold
V
CS
increasing, V
FB
= 4 V V
ILIM2
1.125 1.200 1.275 V
Abnormal Overcurrent Fault Blanking
Duration
Step V
CS
0 V to V
ILIM2
+ 0.5 V to
DRV falling edge, dV/dt = 10 V/ms
t
CS(LEB2)
90 120 150 ns
Abnormal Overcurrent Fault Propagation
Delay
Step V
CS
0 V to V
ILIM2
+ 0.5 V to
DRV falling edge, dV/dt = 10 V/ms
t
CS(delay2)
– 125 175 ns
Set point decrease for V
OPP
= − 250 mV V
CS
Increasing, V
FB
= 4 V V
OPP(MAX)
27 31.25 33 %
Overpower Protection Delay
V
CS
dv/dt = 1 V/ms, measured from
V
OPP(MAX)
to DRV falling edge
t
OPP(delay)
– 125 175 ns
Overpower Signal Blanking Delay t
OPP(blank)
100 120 200 ns
Pull−up Current Source V
CS
= 1.5 V I
CS
−1.5 1.0 −0.5
mA
JITTERING (For E, F, G, I and J versions only)
Frequency of the Jittering CS Pin Source
Current
CS pin being grounded
)
F
jit
1.0 1.3 1.6 kHz
Amplitude of the CS Source Current CS pin being grounded I
jit
85 100 110
mA
HV Pin Voltage for jittering activation HV pin voltage rising (V
in,jit
)
H
210 250 290 V
HV Pin Voltage below which the jittering
Timer activated
HV pin voltage falling (V
in,jit
)
L
185 220 255 V
Blanking Time before Jittering disabling V
HV
< 184 V T
jit(blank)
25 40 55 ms
FAULT PROTECTION
Soft−Start Period
(Done digitally with 63 steps)
Measured from
1
st
DRV pulse to V
CS
= V
ILIM1
t
SSTART
2.8 4.0 5.0 ms
Flyback Overload Fault Timer V
CS
= V
ILIM1
t
OVLD
120 160 200 ms
Overvoltage Protection (OVP) Threshold V
Fault
increasing V
Fault(OVP)
2.79 3.00 3.23 V
Delay Before Fault Confirmation
Used for OVP Detection
Used for OTP Detection
V
Fault
increasing
V
Fault
decreasing
t
delay(Fault_OVP)
t
delay(Fault_OTP)
20
20
27.5
27.5
35
35
ms
Overtemperature Protection (OTP) Thresh-
old (Note 2)
V
Fault
decreasing V
Fault(OTP_in)
0.395 0.40 0.435 V
OTP Pull−up Current Source (Note 2) V
Fault
= V
Fault(OTP_in)
+ 0.2 V
T
J
= 110 °C
I
Fault(OTP)
I
Fault(OTP_110)
42.5
–
45.5
45.5
48.5
–
mA
Fault Input Clamp Voltage V
Fault
= open V
Fault(clamp)
1.15 1.7 2.25 V
Fault Input Clamp Series Resistor R
Fault(clamp)
1.32 1.55 1.78
kW
Auto−recovery Timer T
A−rec_timer
1.1 2 s
STAND−BY MANAGEMENT
Frequency clamp Threshold
F
Clamp
23.5 25 27.5 kHz
Skip Threshold V
FB
decreasing V
SKIP
0.35 0.40 0.45 V
Skip Hysteresis V
FB
increasing V
SKIP(HYS)
35 60 85 mV
THERMAL PROTECTION
Thermal Shutdown
(Note 3) T
SHDN
140 150 170 °C
Thermal Shutdown Hysteresis (Note 3) T
SHDN(HYS)
20 40 60 °C
Thermal Shutdown Delay (Note 3) t
delay(TSHDN)
− 30.0 −
ms
2. NTC with R
110
= 8.8 kW (TTC03−474).
3. The value is not subjected to production test − verified by design/characterization.
