NCP1200A
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Max TJ = 150°C,
VCC = 11 V unless otherwise noted.)
Characteristic
Symbol
Pin
Min
Typ
Max
Unit
Dynamic Self−Supply (All frequency versions, otherwise noted)
VCC Increasing Level at which the Current Source Turns−Off
VCC Decreasing Level at which the Current Source Turns−On
VCC Decreasing Level at which the Latchoff Phase Ends
Internal IC Consumption, No Output Load on Pin 5
VCC(off)
6
VCC(on)
6
VCC(latch)
6
ICC1
6
11.2 12.1
13.1
V
9.0
10
11
V
−
5.4
−
V
−
750
1000
mA
(Note 1)
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 40 kHz
ICC2
6
−
1.2
1.4
mA
(Note 2)
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 60 kHz
ICC2
6
−
1.4
1.6
mA
(Note 2)
Internal IC Consumption, 1.0 nF Output Load on Pin 5, FSW = 100 kHz
ICC2
6
−
1.9
2.2
mA
(Note 2)
Internal IC Consumption, Latchoff Phase
Internal Startup Current Source (TJ > 0°C, pin 8 biased at 50 V)
High−Voltage Current Source, VCC = 10 V
High−Voltage Current Source, VCC = 0
Drive Output
ICC3
6
−
350
−
mA
IC1
8
4.0
7.0
−
mA
IC2
8
−
13
−
mA
Output Voltage Rise−Time @ CL = 1.0 nF, 10−90% of Output Signal
Tr
Output Voltage Fall−Time @ CL = 1.0 nF, 10−90% of Output Signal
Tf
Source Resistance
ROH
Sink Resistance
ROL
Current Comparator (Pin 5 unloaded unless otherwise noted)
5
−
67
−
ns
5
−
25
−
ns
5
27
40
61
W
5
5.0
10
21
W
Input Bias Current @ 1.0 V Input Level on Pin 3
Maximum Internal Current Setpoint (Note 3)
Default Internal Current Setpoint for Skip Cycle Operation
Propagation Delay from Current Detection to Gate OFF State
Leading Edge Blanking Duration (Note 3)
Internal Oscillator (VCC = 11 V, pin 5 loaded by 1.0 kW)
Oscillation Frequency, 40 kHz Version
Built−in Frequency Jittering, fsw = 40 kHz
Oscillation Frequency, 60 kHz Version
Built−in Frequency Jittering, fsw = 60 kHz
Oscillation Frequency, 100 kHz Version
Built−in Frequency Jittering, fsw = 100 kHz
Maximum Duty Cycle
IIB
ILimit
ILskip
TDEL
TLEB
fOSC
fjitter
fOSC
fjitter
fOSC
fjitter
Dmax
3
−
0.02
−
mA
3
0.8
0.9
1.0
V
3
−
360
−
mV
3
−
90
160
ns
3
−
250
−
ns
−
37
43
48
kHz
−
−
350
−
kHz
−
53
61
68
kHz
−
−
460
−
kHz
−
90
103
114
kHz
−
−
620
−
kHz
−
74
83
87
%
Feedback Section (VCC = 11 V, pin 5 unloaded)
Internal Pullup Resistor
Pin 3 to Current Setpoint Division Ratio
Skip Cycle Generation
Rup
2
−
20
−
kW
Iratio
−
−
3.3
−
−
Default Skip Mode Level
Pin 1 Internal Output Impedance
1. Max value at TJ = 0°C.
2. Maximum value @ TJ = 25°C, please see characterization curves.
3. Pin 5 loaded by 1.0 nF.
Vskip
Zout
1
0.95
1.2
1.45
V
1
−
22
−
kW
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