NCP1203
www.onsemi.com
4
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
Symbol Pin Min Typ Max Unit
Supply Section (All frequency versions, otherwise noted)
Turn−on Threshold Level, V
CC
Going Up V
CC(on)
6 12.2 12.8 14 V
Minimum Operating Voltage after Turn−on V
CC(min)
6 7.2 7.8 8.4 V
V
CC
Decreasing Level at which the Latchoff Phase Ends V
CClatch
6 − 4.9 − V
Internal IC Consumption, No Output Load on Pin 5 ICC1 6 − 750 880
(Note 1)
mA
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 40 kHz
ICC2 6 − 1.2 1.4
(Note 2)
mA
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 60 kHz
ICC2 6 − 1.4 1.6
(Note 2)
mA
Internal IC Consumption, 1.0 nF Output Load on Pin 5,
F
SW
= 100 kHz
ICC2 6 − 2.0 2.2
(Note 2)
mA
Internal IC Consumption, Latch−off Phase, V
CC
= 6.0 V ICC3 6 − 250 −
mA
Internal Startup Current Source (Pin 8 biased at 50 V)
High−Voltage Current Source, V
CC
= 10 V IC1 8 3.5 6.0 9.0 mA
High−Voltage Current Source, V
CC
= 0 IC2 8 − 11 − mA
Drive Output
Output Voltage Rise−Time @ CL = 1.0 nF, 10−90% of
Output Signal
T
r
5 − 67 − ns
Output Voltage Fall−Time @ CL = 1.0 nF, 10−90% of
Output Signal
T
f
5 − 28 − ns
Source Resistance R
OH
5 27 40 61
W
Sink Resistance R
OL
5 5.0 10 20
W
Current Comparator (Pin 5 loaded unless otherwise noted)
Input Bias Current @ 1.0 V Input Level on Pin 3
I
IB
3 − 0.02 −
mA
Maximum Internal Current Setpoint (Note 3) I
Limit
3 0.85 0.92 1.0 V
Default Internal Current Setpoint for Skip Cycle Operation I
Lskip
3 − 360 − mV
Propagation Delay from Current Detection to Gate OFF
State
T
DEL
3 − 90 160 ns
Leading Edge Blanking Duration (Note 3) T
LEB
3 − 230 − ns
Internal Oscillator (V
CC
= 11 V, Pin 5 loaded by 1 nF)
Oscillation Frequency, 40 kHz Version
f
OSC
− 37 42 47 kHz
Oscillation Frequency, 60 kHz Version f
OSC
− 57 65 73 kHz
Oscillation Frequency, 100 kHz Version f
OSC
− 90 103 115 kHz
Maximum Duty−Cycle Dmax − 74 80 87 %
Feedback Section (V
CC
= 11 V, Pin 5 unloaded)
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 1 1.0 1.2 1.4 V
Pin 1 Internal Output Impedance Zout 1 − 22 −
kW
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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.
