NCP1200A
http://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
Dynamic Self−Supply (All frequency versions, otherwise noted)
V
CC
Increasing Level at which the Current Source Turns−Off V
CC(off)
6 11.2 12.1 13.1 V
V
CC
Decreasing Level at which the Current Source Turns−On V
CC(on)
6 9.0 10 11 V
V
CC
Decreasing Level at which the Latchoff Phase Ends V
CC(latch)
6 − 5.4 − V
Internal IC Consumption, No Output Load on Pin 5 ICC1 6 − 750 1000
(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 − 1.9 2.2
(Note 2)
mA
Internal IC Consumption, Latchoff Phase ICC3 6 − 350 −
mA
Internal Startup Current Source (T
J
> 0°C, pin 8 biased at 50 V)
High−Voltage Current Source, V
CC
= 10 V IC1 8 4.0 7.0 − mA
High−Voltage Current Source, V
CC
= 0 IC2 8 − 13 − 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 − 25 − ns
Source Resistance R
OH
5 27 40 61
W
Sink Resistance R
OL
5 5.0 10 21
W
Current Comparator (Pin 5 unloaded 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 0.8 0.9 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 − 250 − ns
Internal Oscillator (V
CC
= 11 V, pin 5 loaded by 1.0 kW)
Oscillation Frequency, 40 kHz Version f
OSC
− 37 43 48 kHz
Built−in Frequency Jittering, f
sw
= 40 kHz f
jitter
− − 350 − kHz
Oscillation Frequency, 60 kHz Version f
OSC
− 53 61 68 kHz
Built−in Frequency Jittering, f
sw
= 60 kHz f
jitter
− − 460 − kHz
Oscillation Frequency, 100 kHz Version f
OSC
− 90 103 114 kHz
Built−in Frequency Jittering, f
sw
= 100 kHz f
jitter
− − 620 − kHz
Maximum Duty Cycle Dmax − 74 83 87 %
Feedback Section (V
CC
= 11 V, pin 5 unloaded)
Internal Pullup Resistor R
up
2 − 20 −
kW
Pin 3 to Current Setpoint Division Ratio I
ratio
− − 3.3 − −
Skip Cycle Generation
Default Skip Mode Level V
skip
1 0.95 1.2 1.45 V
Pin 1 Internal Output Impedance Z
out
1 − 22 −
kW
1. Max value at T
J
= 0°C.
2. Maximum value @ T
J
= 25°C, please see characterization curves.
3. Pin 5 loaded by 1.0 nF.
