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NCP1231 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP1231
Description  Low−Standby Power High Performance PWM Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1231 Datasheet(HTML) 5 Page - ON Semiconductor

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


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