NCV8842 查看數據表（PDF） - ON Semiconductor
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NCV8842 Datasheet PDF : 16 Pages
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NCV8842
ELECTRICAL CHARACTERISTICS (−40°C < TJ < 150°C, 4.5 V< VIN < 40 V; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Oscillator
Operating Frequency
−
153
170
Frequency Line Regulation
−
−
0.05
Maximum Duty Cycle
−
85
90
VFB Frequency Foldback Threshold
PWM Comparator
−
0.29
0.32
Slope Compensation Voltage
Minimum Output Pulse Width
Power Switch
Fix VFB, DVC/DTON
VFB to VSW
5.0
9.0
−
100
Current Limit
Foldback Current
Saturation Voltage
Current Limit Delay
VFB > 0.36 V
VFB < 0.29 V
IOUT = 1.5 A, VBOOST = VIN + 2.5 V
(Note 5)
1.6
2.3
0.9
1.5
0.4
0.7
−
120
Error Amplifier
Internal Reference Voltage
−
1.244 1.270
Reference PSRR
(Note 5)
−
40
FB Input Bias Current
−
−
0.02
Output Source Current
Output Sink Current
Output High Voltage
Output Low Voltage
Unity Gain Bandwidth
VC = 1.270 V, VFB = 1.0 V
VC = 1.270 V, VFB = 2.0 V
VFB = 1.0 V
VFB = 2.0 V
(Note 5)
15
25
15
25
1.39
1.46
5.0
20
−
500
Open Loop Amplifier Gain
(Note 5)
−
70
Amplifier Transconductance
(Note 5)
−
6.4
Sync
Sync Frequency Range
−
190
−
Sync Pin Bias Current
Sync Threshold Voltage
VSYNC = 5.0 V
−
−
360
0.9
1.5
Shutdown
Shutdown Threshold Voltage
−
1.0
1.3
SHDNB Input Current
Thermal Shutdown
Vin = 5.0 V, (Note 5)
−
4.0
Overtemperature Trip Point
(Note 5)
175
185
Thermal Shutdown Hysteresis
(Note 5)
−
42
5. Guaranteed by design, not 100% tested in production.
Max
187
0.15
95
0.36
17
200
3.0
2.1
1.0
160
1.296
−
0.1
35
35
1.53
60
−
−
−
355
485
1.9
1.6
−
195
−
Unit
kHz
%/V
%
V
mV/ms
ns
A
A
V
ns
V
dB
mA
mA
mA
V
mV
kHz
dB
mA/V
kHz
mA
V
V
mA
°C
°C
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