ncp1282 ON Semiconductor, ncp1282 Datasheet - Page 6

• Manufacturer Part Number: ncp1282
• Description: High-performance Active Clamp/reset Pwm Controller Featuring Hv Start-up
• Manufacturer: ON Semiconductor

4. Guaranteed by design only.
ELECTRICAL CHARACTERISTICS
V
R
125°C, unless otherwise noted)
CURRENT LIMIT AND THERMAL SHUTDOWN
LEADING EDGE BLANKING
CYCLE SKIP CURRENT LIMIT MODE
5.0 V REFERENCE
OSCILLATOR
Cycle–by–Cycle Threshold Voltage (V
Propagation Delay to Output
(V
Thermal Shutdown Threshold (Junction Temperature Increasing, Note 4)
Thermal Shutdown Hysteresis (Temperature Decreasing, Note 4)
Offset Voltage
Blanking Time
V
Threshold Voltage Hysteresis
Output Voltage (I
Load Regulation (I
Line Regulation (V
Discharge Current (V
Frequency
T
T
Peak Voltage ("3%)
Valley Voltage ("3%)
Discharge Current (V
Maximum Operating Frequency (Note 4)
Duty Cycle (R
Adjustable Maximum Duty Cycle (Note 4)
CS
D
J
J
EA
Charge Current (V
Discharge Current (V
Number of Pulses to Exit Cycle Skip Mode
Upper Threshold Voltage (Ramp up V
Lower Threshold Voltage (Ramp down V
CS
T
T
= 25°C ("5%)
= -40°C to 125°C ("7.5%)
= 25 kW, R
J
J
= 0 V, V
Threshold that Disables LEB (Measured together with t
= 25°C
= –40°C to 125°C
= V
ILIM
SS
to 1.0 V, LEB Disabled, V
SYNC
D
= open, R
= 25 kW)
REF
REF
AUX
= 5.0 kW, C
CSKIP
= 0 mA)
UVOV
RTCT
= 0 to 5.0 mA)
= 10.5 to 20 V, I
CSKIP
T
= 1.25 V)
= 13.7 kW, C
= 2.3 V)
= 0 V, V
= 1.25 V)
Characteristic
REF
REF
= 0.1 mF, R
out
out
REF
= 2.5 V)
CSKIP
AUX
= 10 V)
= 10 V)
(continued) (V
CSKIP
= 0 mA)
= 10 mF, C
, V
FF
CS
)
= 29.4 kW, C
= 1.0 V)
T
= 470 pF, C
in
http://onsemi.com
= 48 V, V
LEB
FF
)
NCP1282
= 470 pF. For typical values T
out1
AUX
6
= C
= 12 V, V
out2
V
V
V
V
Pulse
V
V
CSKIP(valley)
V
CSKIP(peak)
V
RTCT(valley)
V
I
I
RTCT(peak)
Symbol
= 100 pF, C
LEB(offset)
CSKIP(C)
CSKIP(D)
REF(Load)
I
T
CSKIP(H)
REF(line)
LEB(dis)
REF(D)
I
D
V
V
f
f
t
t
RTCT
UVOV
SHDN
ILIM
OSC
MAX
LEB
T
MAX
ILIM
REF
D
H
CSKIP
= 2.3 V, V
UVOV
J
= 25°C, for min/max values, T
4.875
211.2
2.83
0.39
58.8
Min
472
222
= 0.01 mF, C
4.1
6.5
3.8
1.0
EA
65
66
85
–
–
–
–
–
–
–
–
–
-
-
-
= open, V
0.465
3.03
2.92
62.6
Typ
495
160
246
480
8.6
2.5
5.0
8.0
2.1
CSKIP
80
25
10
75
90
16
–
–
3
–
–
–
-
CSKIP
= 6800 pF,
= 0 V,
5.075
272.2
277.2
Max
3.24
0.52
512
110
116
111
90
50
50
65
11
–
–
–
–
–
–
–
-
-
-
–
-
J
is – 40°C to
Unit
MHz
kHz
mV
mV
mV
mV
mA
mA
mA
mA
ns
°C
°C
ns
%
%
V
V
V
V
V
V
V
-