NCP1203
ELECTRICAL CHARACTERISTICS
(For typical values T
J
= 25°C, for min/max values T
J
= 0°C to +125°C, Max T
J
= 150°C,
V
CC
= 11 V unless otherwise noted.)
Characteristic
Supply Section
(All frequency versions, otherwise noted)
Turn−on Threshold Level, V
CC
Going Up
Minimum Operating Voltage after Turn−on
V
CC
Decreasing Level at which the Latchoff Phase Ends
Internal IC Consumption, No Output Load on Pin 5
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 40 kHz
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 60 kHz
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 100 kHz
Internal IC Consumption, Latch−off Phase, V
CC
= 6.0 V
Internal Startup Current Source
(Pin 8 biased at 50 V)
High−Voltage Current Source, V
CC
= 10 V
High−Voltage Current Source, V
CC
= 0
Drive Output
Output Voltage Rise−Time @ CL = 1.0 nF, 10−90% of
Output Signal
Output Voltage Fall−Time @ CL = 1.0 nF, 10−90% of
Output Signal
Source Resistance
Sink Resistance
Current Comparator
(Pin 5 loaded unless otherwise noted)
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
(V
CC
= 11 V, Pin 5 loaded by 1 nF)
Oscillation Frequency, 40 kHz Version
Oscillation Frequency, 60 kHz Version
Oscillation Frequency, 100 kHz Version
Maximum Duty−Cycle
Feedback Section
(V
CC
= 11 V, Pin 5 unloaded)
Internal Pullup Resistor
Pin 3 to Current Setpoint Division Ratio
Skip Cycle Generation
Default Skip Mode Level
Pin 1 Internal Output Impedance
Vskip
Zout
1
1
1.0
−
1.2
22
1.4
−
V
kW
Rup
Iratio
2
−
−
−
20
3.3
−
−
kW
−
f
OSC
f
OSC
f
OSC
Dmax
−
−
−
−
37
57
90
74
42
65
103
80
47
73
115
87
kHz
kHz
kHz
%
I
IB
I
Limit
I
Lskip
T
DEL
T
LEB
3
3
3
3
3
−
0.85
−
−
−
0.02
0.92
360
90
230
−
1.0
−
160
−
mA
V
mV
ns
ns
T
r
T
f
R
OH
R
OL
5
5
5
5
−
−
27
5.0
67
28
40
10
−
−
61
20
ns
ns
W
W
IC1
IC2
8
8
3.5
−
6.0
11
9.0
−
mA
mA
V
CC(on)
V
CC(min)
V
CClatch
ICC1
ICC2
ICC2
ICC2
ICC3
6
6
6
6
6
6
6
6
12.2
7.2
−
−
−
−
−
−
12.8
7.8
4.9
750
1.2
1.4
2.0
250
14
8.4
−
880
(Note 1)
1.4
(Note 2)
1.6
(Note 2)
2.2
(Note 2)
−
V
V
V
mA
mA
mA
mA
mA
Symbol
Pin
Min
Typ
Max
Unit
1. Max value at T
J
= 0°C.
2. Maximum value @ T
J
= 25°C, please see characterization curves.
3. Pin 5 loaded by 1 nF.
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