NCP1294 データシートの表示（PDF） - ON Semiconductor
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NCP1294 Datasheet PDF : 13 Pages
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NCP1294
ELECTRICAL CHARACTERISTICS (−40°C < TA < 85°C; −40°C < TJ < 125°C; 3.0 V < VC < 15 V; 4.7 V < VCC < 15 V;
RT = 12 k; CT = 390 pF; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Max
Reference Voltage
Total Accuracy
Line Regulation
0 mA < IREF < 2.0 mA
−
3.2
3.3
3.4
−
6.0
20
Load Regulation
Noise Voltage
0 mA < IREF < 2.0 mA
10 Hz < F < 10 kHz. Note 2
−
6.0
15
−
50
−
Op Life Shift
T = 1000 Hrs. Note 2
−
4.0
20
Fault Voltage
−
2.8
2.95
3.1
VREF(OK) Voltage
VREF(OK) Hysteresis
Current Limit
−
2.9
3.05
3.2
−
30
100
150
−
2.0
40
100
Error Amp
Reference Voltage
VFB Input Current
Open Loop Gain
VFB = COMP
VFB = 1.2 V
Note 2
1.234
−
60
1.263
1.3
−
1.285
2.0
−
Unity Gain Bandwidth
Note 2
1.5
−
−
COMP Sink Current
COMP Source Current
COMP High Voltage
COMP Low Voltage
PSRR
COMP = 1.4 V, VFB = 1.45 V
COMP = 1.4 V, VFB = 1.15 V
VFB = 1.15 V
VFB = 1.45 V
Freq = 120 Hz. Note 2
3.0
12
32
1.0
1.6
2.0
2.8
3.1
3.4
75
125
300
60
85
−
SS Clamp, VCOMP
COMP Max Clamp
SS = 1.4 V, VFB = 0 V, ISET = 2.0 V
Note 2
1.3
1.4
1.5
1.7
1.8
1.9
Oscillator
Frequency Accuracy
−
260
273
320
Voltage Stability
−
−
1.0
2.0
Temperature Stability
Max Frequency
−40°C < TJ < 125°C. (Note 2)
Note 2
−
8.0
−
1.0
−
−
Duty Cycle
−
80
85
90
Peak Voltage
Note 2
1.94
2.0
2.06
Valley Clamp Voltage
−
0.9
0.95
1.0
Valley Voltage
Note 2
0.85
1.0
1.15
Discharge Current
−
0.85
1.0
1.15
Synchronization
Input Threshold
−
0.9
1.4
1.8
Output Pulse Width
−
200
320
450
Output High Voltage
100 mA Load
2.1
2.5
2.8
Input Resistance
−
35
70
140
SYNC to Drive Delay
Time from SYNC to GATE Shutdown
100
140
180
Output Drive Current
RSYNC = 1.0 W
2. Guaranteed by design, not 100% tested in production.
1.0
1.5
2.25
Unit
V
mV
mV
mV
mV
V
V
mV
mA
V
mA
dB
MHz
mA
mA
V
mV
dB
V
V
kHz
%
%
MHz
%
V
V
V
mA
V
ns
V
kW
ns
mA
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