NCV8843(2006) Ver la hoja de datos (PDF) - ON Semiconductor
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NCV8843 Datasheet PDF : 15 Pages
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NCV8843
ELECTRICAL CHARACTERISTICS (−40°C < TJ < 125°C, 4.5 V< VIN < 40 V; unless otherwise specified.)
Characteristic
Test Conditions
Min
Typ
Oscillator
Operating Frequency
−
306
340
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 3)
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 3)
−
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 3)
15
25
15
25
1.39
1.46
5.0
20
−
500
Open Loop Amplifier Gain
(Note 3)
−
70
Amplifier Transconductance
(Note 3)
−
6.4
Sync
Sync Frequency Range
−
377
−
Sync Pin Bias Current
Sync Threshold Voltage
VSYNC = 5.0 V
−
−
360
0.9
1.5
Shutdown
Shutdown Threshold Voltage
−
1.0
1.3
Shutdown Pin Bias Current
Thermal Shutdown
VSHDNB = 0 V
0.14
5.00
Overtemperature Trip Point
(Note 3)
175
185
Thermal Shutdown Hysteresis
(Note 3)
−
42
3. Guaranteed by design, not 100% tested in production.
Max
374
0.15
95
0.36
17
200
3.0
2.1
1.0
160
1.296
−
0.1
35
35
1.53
60
−
−
−
710
485
1.9
1.6
35
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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