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NCP1271 Datasheet(PDF) 6 Page - ON Semiconductor

Part # NCP1271
Description  Soft?뭆kip Mode Standby PWM Controller with Adjustable Skip Level and External Latch
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1271 Datasheet(HTML) 6 Page - ON Semiconductor

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NCP1271
http://onsemi.com
6
ELECTRICAL CHARACTERISTICS (continued) (For typical values TJ = 25°C, for min/max values, TJ = −40°C to +125°C,
VCC = 14 V, HV = open, skip = open, FB = 2 V, CS = Ground, DRV = 1 nF, unless otherwise noted.)
Characteristic
Pin
Symbol
Min
Typ
Max
Unit
STARTUP CURRENT SOURCE
High−Voltage Current Source
Inhibit Voltage (ICC = 200 mA, HV = 50 V)
Inhibit Current (VCC = 0 V, HV = 50 V)
Startup (VCC = VCC(on) − 0.2 V, HV = 50 V)
Leakage (VCC = 14 V, HV = 500 V)
6
6
6
8
Vinhibit
Iinhibit
IHV
IHV−leak
190
80
3.0
10
600
200
4.1
25
800
350
6.0
50
mV
mA
mA
mA
Minimum Startup Voltage (VCC = VCC(on) – 0.2 V, ICC = 0.5 mA)
8
VHV(min)
20
28
V
SUPPLY SECTION
VCC Regulation
Startup Threshold, VCC Increasing
Minimum Operating Voltage After Turn−On
VCC Operating Hysteresis
Undervoltage Lockout Threshold Voltage, VCC Decreasing
Logic Reset Level (VCC(latch) –VCC(reset) > 1.0 V) (Note 7)
6
VCC(on)
VCC(off)
VCC(on) − VCC(off)
VCC(latch)
VCC(reset)
11.2
8.2
3.0
5.0
12.6
9.1
3.6
5.8
4.0
13.8
10
4.2
6.5
V
V
V
V
V
VCC Supply Current
Operating (VCC = 14 V, 1.0 nF Load, VFB = 2.0 V, 65 kHz Version)
Operating (VCC = 14 V, 1.0 nF Load, VFB = 2.0 V, 100 kHz Version)
Output Stays Low (VCC = 14 V, VFB = 0 V)
Latchoff Phase (VCC = 7.0 V, VFB = 2.0 V)
6
ICC1
ICC1
ICC2
ICC3
2.3
3.1
1.3
500
3.0
3.5
2.0
720
mA
mA
mA
mA
7. Guaranteed by design.
TYPICAL CHARACTERISTICS
Figure 3. Oscillation Frequency vs.
Temperature
Figure 4. Maximum Duty Cycle vs.
Temperature
TEMPERATURE (°C)
TEMPERATURE (°C)
125
100
75
50
25
0
−50
50
60
70
80
90
100
110
125
100
75
50
25
0
−50
75
76
77
78
79
80
81
−25
−25
82
83
84
85
100 kHz
65 kHz


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