ncp1282 ON Semiconductor, ncp1282 Datasheet - Page 5

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

3. Guaranteed by design only.
ELECTRICAL CHARACTERISTICS
R
C
STARTUP CONTROL AND V
LINE UNDER/OVERVOLTAGE DETECTOR
LINE FEEDFORWARD
V
Minimum Startup Voltage (Pin 1)
Inhibit Bias Current
Startup Circuit Output Current
Startup Circuit Off-State Leakage Current (V
Startup Circuit Breakdown Voltage (Note 3)
I
Auxiliary Supply Current after V
Undervoltage Threshold (V
Undervoltage Hysteresis
Undervoltage Ratio (V
Overvoltage Threshold (V
Overvoltage Hysteresis
Offset Current (V
Offset Current Turn ON Threshold ("5%, I
Peak Voltage (Volt-Second Clamp)
Discharge Current (V
Offset Voltage (V
Feedforward Offset Minus Soft-Stop Reset Voltage
start(off)
REF
T
AUX
T
T
Outputs Disabled
Outputs Enabled
= 13.3 kW, C
Inhibit Threshold Voltage
Startup Threshold/V
Operating V
I
V
V
V
J
J
AUX
V
V
V
AUX
AUX
AUX
= 0.1 mF, R
= 25°C
= –40°C to 125°C
Regulation (V
UVOV
EA
EA
Minimum Operating V
(V
= 50 mA, T
= 1.0 mA, V
UVOV
= 0 V
= V
= V
= 0 V
= 4.0 V
= 0 V
inhibit
AUX(on)
= 2.3 V, V
AUX
AUX
FF
FF
UVOV
+ 0.2 V
= 29.4 kW, C
J
UVOV
Valley Voltage
= 0 V, Ramp Down V
= 10 mF, C
AUX
– 0.2 V
= 125°C
FF
UV(H)
= 2.8 V)
AUX
= 0.5 V, V
= V
EA
= 0 V)
in
in
/V
Regulation Peak (V
= 0 V)
AUX(on)
Increasing)
AUX
Increasing)
UV
Characteristic
AUX
T
FF
AUX
)
= 470 pF, C
Valley Voltage after Turn-On
= 470 pF. For typical values T
SS
REGULATOR
– 0.2 V
Turn-On
= 0 V)
SS
(V
offset(UVOV)
)
out1
in
in
= 48 V, V
= 500 V, V
AUX
= C
out2
Increasing)
= 40 mA)
AUX
= 100 pF, C
UVOV
http://onsemi.com
= 12 V, V
J
= 0 V)
NCP1282
= 25°C, for min/max values, T
UVOV
5
UVOV
= 0.01 mF, C
= 2.3 V, V
V
I
offset(UVOV)
V
V
offset(UVOV)
V
V
V
V
D
Symbol
V
V
I
AUX(off1)
AUX(off2)
V
start(off)
V
offset(FF)
V
start(min)
UV(ratio)
FF(peak)
AUX(on)
I
I
I
I
I
I
I
(FF-SS)
BR(DS)
inhibit
start1
start2
AUX1
AUX2
AUX3
V
V
FF(D)
OV(H)
UV(H)
inhibit
UV
OV
EA
CSKIP
= open, V
= 6800 pF, R
J
is – 40°C to 125°C, unless otherwise noted.)
1.979
0.074
0.075
0.118
10.6
7.16
4.03
3.65
2.80
Min
500
8.9
8.0
2.4
2.8
8.5
CSKIP
70
38
–
–
–
–
–
–
–
7
= 0 V, V
D
= 25 kW, R
0.093
0.093
0.185
1.15
11.1
2.05
2.95
Typ
171
9.4
8.4
9.3
6.1
3.1
4.3
4.9
4.5
2.6
3.0
25
48
70
–
–
–
–
CS
= 0 V, V
SYNC
0.127
0.268
2.116
0.118
Max
11.6
23.2
11.3
4.94
5.62
3.10
300
100
183
1.6
9.9
9.0
8.1
3.6
7.0
2.8
3.2
50
58
SS
–
–
= 5.0 kW,
= open,
Unit
mA
mA
mA
mV
mA
mA
mA
%
V
V
V
V
V
V
V
V
V
V