NCP1231 Ver la hoja de datos (PDF) - ON Semiconductor
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NCP1231 Datasheet PDF : 21 Pages
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NCP1231
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, Max TJ = 150°C,
VCC = 13 V, unless otherwise noted.)
Rating
Symbol Pin Min Typ Max Unit
Supply Section (All frequency versions, otherwise noted)
Turn−On Threshold Level, VCC going up (Vfb = 2.0 V)
Minimum Operating Voltage after Turn−On
VCC Level at which the Internal Logic gets Reset (Note 4)
Startup Current (VCCON −0.2 V)
Internal IC Consumption, No Output Load on Pin 6 (Vfb = 2.5 V)
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 65 kHz
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 100 kHz
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 133 kHz
Internal IC Consumption, Latch−Off Phase
Drive Output
VCCON
VCC(min)
VCCreset
Istartup
ICC1
ICC2
ICC2
ICC2
ICC3
6 11.3 12.6 13.8 V
6 7.0 7.7 8.4 V
6
−
4.0
−
V
6
−
30
50 mA
6 0.75 1.3 2.0 mA
6 1.4 2.0 2.6 mA
6 1.4 2.4 3.1 mA
6 1.4 2.9 3.7 mA
6 300 500 800 mA
Output Voltage Rise−Time @ CL = 1.0 nF, 10−90% of Output Signal (Note 4)
Output Voltage Fall−Time @ CL = 1.0 nF, 10−90% of Output Signal (Note 4)
Source Resistance (RLoad = 300 W, Vfb = 2.5 V)
Sink Resistance, at 1.0 V on Pin 5 (Vfb = 3.5 V)
Pin1 Output Impedance (or Rdson between Pin 1 and Pin 6 when SW1 is closed)
Rload on Pin 1= 680 W
Tr
Tf
ROH
ROL
RPFC
5
−
40
−
ns
5
−
15
−
ns
5 6.0 12.3 25
W
5 3.0
7.5
18
W
1 6.0 11.7 23
W
Current Comparator (Pin 5 unloaded)
Input Bias Current @ 1.0 V Input Level on Pin 3
Maximum Internal Current Set Point
TJ = +25°C
TJ = −40°C to +125°C
IIB
ILimit
3
−
0.02
−
mA
3 0.95 1.00 1.05 V
0.93
−
1.07
Default Internal Set Point for Skip Cycle Operation and Standby Detection
Default Internal Set Point to Leave Standby
Propagation Delay from CS Detected to Gate Turned Off (Pin 5 Loaded by 1.0 nF)
Leading Edge Blanking Duration
Internal Oscillator
Vskip
3 600 750 900 mV
Vstby−out
−
1.0
1.25
1.5
V
TDEL CS
3
−
90 200 ns
TLEB
3 100 250 350 ns
Oscillation Frequency, 65 kHz version (Vfb = 2.5 V)
Oscillation Frequency, 100 kHz version (Vfb = 2.5 V)
Oscillation Frequency, 133 kHz version (Vfb = 2.5 V)
Internal Modulation Swing, in Percentage of Fsw) (Typical) (Note 4)
fOSC
fOSC
fOSC
−
− 56
65
69 kHz
− 88 100 108 kHz
− 118 133 140 kHz
−
−
±4.0
−
%
Internal Swing Period with a 82 nF Capacitor to Pin 7) (Typical) (Note 4)
−
−
−
5.0
− ms
Maximum Duty−Cycle
Typical Soft−Start Period with a 82 nF to Pin 7 (Note 4)
Dmax
SS
− 75
80
85 %
7
−
5.0
− ms
SS Charging/Discharging Current
−
7 35
60
75 mA
Timer Charging Current (Typical) (Note 4)
−
7
−
1.36
−
mA
Timer Peak Voltage
−
7 3.5 4.0 4.5 V
Timer Valley Voltage
−
7 1.9 2.2 2.6 V
Feedback Section (VCC = 13 V)
Opto Current Source (Vfb = 0.75 V)
Pin 3 to Current Setpoint Division Ratio (Note 3)
−
2 190 235 270 mA
Iratio
−
−
3.0
−
−
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