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