NCP1380 ON Semiconductor, NCP1380 Datasheet - Page 8

• Manufacturer Part Number: NCP1380
• Description: Quasi-Resonant Current Mode Controller
• Manufacturer: ON Semiconductor

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ELECTRICAL CHARACTERISTICS
V
FEEDBACK SECTION
FAULT PROTECTION (ALL VERSIONS)
FAULT PROTECTION A & B VERSIONS
FAULT PROTECTION C & D VERSIONS
3. Guaranteed by design.
4. The peak current setpoint goes down as the load decreases. It is frozen below I
5. If negative voltage in excess to −300 mV is applied to ZCD pin, the current setpoint decrease is no longer guaranteed to be linear
6. Minimum value for T
7. NTC with R
T
R
V
V
R
t
CS
I
latch(delay)
t
SHDN(HYS)
Fault(clamp)
Fault(clamp)
Fault(clamp)
Symbol
V
OTP(REF)
t
BO(delay)
V
V
FB(pullup)
T
SSTART
t
V
V
V
V
V
HVCOD
FB(TH)
HVCOI
V
V
V
OVLD
I
V
SHDN
I
= 0 V, V
ratio
OVP
OTP
H2D
H3D
H4D
BO
H4I
H3I
H2I
BO
fault
110
Internal pullup resistor
Pin FB to current setpoint division ratio
FB pin threshold under which C
V
Valley threshold
FB voltage where 1
starts
FB voltage where 2
starts
FB voltage where 3
starts
FB voltage where 4
FB voltage where VCO ends and 4
FB voltage where 4
starts
FB voltage where 3
starts
FB voltage where 2
starts
Thermal Shutdown
Thermal Shutdown Hysteresis
Overload Timer
Soft−start duration
Clamp series resistor
Fault detection level for OVP
Delay before latch confirmation
Reference current for direct connection of an
NTC (Note 7)
Fault detection level for OTP
Clamped voltage (Fault pin left open)
Brown−Out level
Sourced hysteresis current V
Delay before entering and exiting Brown−out
Clamped voltage (Fault pin left open)
= 1.5 V, C
CT(MAX)
= 8.8 kW.
J
= 125°C
T
= 680 pF) For min/max values T
st
nd
rd
th
th
rd
nd
valley ends and 2
valley ends and 4
valley ends and VCO starts
valley ends and 3
valley ends and 2
valley ends and 3
valley ends and 1
(Unless otherwise noted: For typical values T
Fault
T
is clamped to
> V
th
valley starts
BO
nd
rd
th
nd
rd
st
http://onsemi.com
valley
valley
valley
valley
valley
valley
J
= −40°C to +125°C, Max T
8
V
V
V
V
V
V
V
V
Device switching (F
around 65 kHz)
V
V
measured from 1
pulse to V
V
V
V
V
Fault pin open
V
V
Fault pin open
FB
FB
FB
FB
FB
FB
FB
FB
FB
FB
ILIM
Fault
Fault
Fault
Fault
Fault
decreases
decreases
decreases
decreases
increases
increases
increases
increases
= 4 V, V
= 4 V, V
increasing
= V
decreasing
decreasing
= V
Condition
OTP
BO
CS(peak)
peak(VCO)
CS
CS
+ 0.2 V
+ 0.2 V
> V
ramping up,
J
st
= 25°C, V
J
= 90% of
ILIM
DRV
= 150°C, V
SW
(I
peak
CC
= cst)
CC
= 12 V, V
1.316
1.128
0.846
0.732
1.316
1.504
1.692
1.880
0.744
0.744
0.26
2.35
22.5
1.13
22.5
Min
140
= 12 V)
3.8
2.8
1.3
1.0
15
75
85
−
9
ZCD
1.55
1.35
Typ
4.0
0.3
1.4
1.2
0.9
0.8
1.4
1.6
1.8
2.0
3.8
2.5
0.8
0.8
1.2
18
40
85
30
91
10
30
−
= 0 V, V
1.484
1.272
0.954
0.828
1.484
1.696
1.908
2.120
0.856
0.856
Max
0.34
2.65
37.5
1.57
37.5
170
FB
4.2
4.8
1.8
1.4
22
95
97
11
−
= 3 V,
Unit
kW
ms
ms
kW
°C
°C
mA
mA
ms
ms
V
V
V
V
V
V
V