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NCP1280DR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NCP1280
http://onsemi.com
7
TYPICAL CHARACTERISTICS
Figure 3. Auxiliary Supply Voltage Thresholds
versus Junction Temperature
Figure 4. Startup Circuit Output Current
versus Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C) T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
5
6
7
8
9
10
11
12
1251007550250−25−50
10
11
12
13
14
15
16
Figure 5. Startup Circuit Output Current
versus Auxiliary Supply Voltage
Figure 6. Startup Circuit Output Current
versus Line Voltage
V
AUX
, AUXILIARY SUPPLY VOLTAGE (V) V
in
, LINE VOLTAGE (V)
121086420
13.5
14.0
14.5
15.0
15.5
16.0
16.5
7006004003002001000
0
4
8
12
16
20
Figure 7. Startup Circuit Off−State Leakage
Current versus Line Voltage
Figure 8. Auxiliary Supply Current versus
Junction Temperature
V
in
, LINE VOLTAGE (V) T
J
, JUNCTION TEMPERATURE (°C)
6005004003002001000
0
5
10
15
20
25
30
40
1251007550250−25−50
0
0.5
1.0
1.5
2.0
2.5
3.5
4.0
V
AUX
, AUXILIARY SUPPLY VOLTAGE (V)
150 150
17
18
19
I
START
, STARTUP CIRCUIT OUTPUT
CURRENT (mA)
17.0
I
START
, STARTUP CIRCUIT OUTPUT
CURRENT (mA)
I
START
, STARTUP CIRCUIT OUTPUT
CURRENT (mA)
35
I
START(off)
, STARTUP CIRCUIT OFF−
STATE LEAKAGE CURRENT (A)
150
3.0
I
AUX
, AUXILIARY SUPPLY CURRENT (mA)
STARTUP
THRESHOLD
MINIMUM
OPERATING
THRESHOLD
V
AUX
= 0 V
V
AUX
= V
AUX(on)
− 0.2 V
T
J
= −40°C
T
J
= 25°C
T
J
= −40°C
T
J
= 25°C
T
J
= 125°C
V
EA
= 0 V
V
UV/OV
= 0 V
V
AUX
= 12 V
V
in
= 82 V
V
in
= 82 V
V
AUX
= V
AUX(on)
− 0.2 V
V
AUX
= 12 V
500
9
13.0
T
J
= 125°C
50
45
700 800 900
NCP1280
http://onsemi.com
8
TYPICAL CHARACTERISTICS
Figure 9. Operating Auxiliary Supply Current
versus Junction Temperature
Figure 10. Line Under/Overvoltage Thresholds
versus Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C) T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
0
1
2
3
4
5
6
7
1251007550250−25−50
0
0.5
1.0
1.5
2.0
4.0
Figure 11. Line Under/Overvoltage Thresholds
Hysteresis versus Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C)
150125100250−25−50
90
100
110
120
130
140
160
Figure 12. Current Limit Thresholds versus
Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
400
425
450
475
500
525
575
600
I
AUX3
, OPERATING AUXILIARY
SUPPLY CURRENT (mA)
150 150
2.5
3.0
3.5
V
UV/OV
, UV/OV VOLTAGE (V)
150
V
UV/OV(H)
, UV/OV THRESHOLD
VOLTAGE HYSTERESIS (mV)
150
550
I
LIM
, CURRENT LIMIT THRESHOLDS (mV)
7550
f
OSC
= 440 kHz
UV THRESHOLD
OV THRESHOLD
UV HYSTERESIS
CYCLE SKIP
CYCLE BY CYCLE
V
AUX
= 12 V
DC [ 50%
f
OSC
= 300 kHz
f
OSC
= 87 kHz
OV HYSTERESIS
Figure 13. Current Limit Propagation Delay
versus Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
70
75
80
85
90
95
115
120
t
ILIM
, CURRENT LIMIT
PROPAGATION DELAY (ns)
150
100
105
110
V
AUX
= 12 V
Measured from V
OH
to 0.5 V
OH
Figure 14. Oscillator Frequency versus
Junction Temperature
T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
0
50
100
150
200
250
450
150
300
350
400
f
osc
, OSCILLATOR FREQUENCY (kHz)
R
T
= 390 k
R
T
= 101 k
R
T
= 68 k
R
T
= 220 k
NCP1280
http://onsemi.com
9
TYPICAL CHARACTERISTICS
T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
3.0
3.5
4.0
4.5
5.0
5.5
6.5
7.0
150
6.0
I
SS(C)
, SOFT−START CHARGE CURRENT (A)
30
35
40
45
50
55
65
70
60
CHARGE
DISCHARGE
Figure 15. Oscillator Frequency versus
Junction Temperature
Figure 16. Oscillator Frequency versus
Timing Resistor
R
T
, TIMING RESISTOR (k)
40030025020015010050
0
100
200
300
400
600
500
f
osc
, OSCILLATOR FREQUENCY (kHz)
350
T
J
, JUNCTION TEMPERATURE (°C)
1251007550250−25−50
285
290
295
300
305
310
150
315
f
osc
, OSCILLATOR FREQUENCY (kHz)
R
T
= 101 k
T
J
= 25°C
DC [ 50%
525450225150750
0
10
20
40
60
90
DC
MAX
, MAXIMUM DUTY CYCLE (%)
375300
30
50
T
J
= −40°C
T
J
= 125°C
80
70
V
EA
= 3.0 V
V
DCMAX
= 0 V
T
J
, JUNCTION TEMPERATURE (°C)
150125100750−25−50
50
60
70
80
90
100
DC
MAX
, MAXIMUM DUTY CYCLE (%)
5025
R
P
= OPEN, R
MDP
= OPEN
R
P
= 0 , R
MDP
= OPEN
R
FF
= 1.0 M
Figure 17. Feedforward Internal Resistance
versus Junction Temperature
150125100750−25−50
9
10
11
12
13
14
15
19
17
FEEDFORWARD INTERNAL RESISTANCE (k)
5025
16
18
Figure 18. Maximum Duty Cycle versus
Feedforward Current
Figure 19. Maximum Duty Cycle versus
Junction Temperature
Figure 20. Soft−Start Charge/Discharge
Currents versus Junction Temperature
I
SS(D)
, SOFT−START DISCHARGE CURRENT (mA)
T
J
, JUNCTION TEMPERATURE (°C)
I
FF
, FEEDFORWARD CURRENT (A)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NCP1280DR2G

Mfr. #:
Buy NCP1280DR2G
Manufacturer:
ON Semiconductor
Description:
Switching Controllers Active Clamp Voltage Mode PWM
Lifecycle:
New from this manufacturer.
Delivery:
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