NCP1397A/B, NCV1397A/B
www.onsemi.com
6
ELECTRICAL CHARACTERISTICS
(For typical values T
J
= 25°C, for min/max values T
J
= −40°C to +125°C, Max T
J
= 150°C, V
CC
= 12 V unless otherwise noted)
Symbol Rating Pin Min Typ Max Unit
SUPPLY SECTION
V
CC(on)
Turn−on threshold level, V
CC
going up 12 9.7 10.5 11.3 V
V
CC(min)
Minimum operating voltage after turn−on 12 8.7 9.5 10.3 V
V
boot(on)
Startup voltage on the floating section 16−14 8 9 10 V
V
boot(min)
Cutoff voltage on the floating section 16−14 7.4 8.4 9.4 V
I
startup
Startup current, V
CC
< V
CC(on)
12 − − 300
mA
V
CC(reset)
V
CC
level at which the internal logic gets reset 12 − 6.6 − V
I
CC1
Internal IC consumption, no output load on pin 15/14 – 11/10,
F
SW
= 300 kHz
12 − 4 − mA
I
CC2
Internal IC consumption, 1 nF output load on pin 15/14 – 11/10,
F
SW
= 300 kHz
12 − 11 − mA
I
CC3
Consumption in fault or disable mode (All drivers disabled,
Rt = 34 kW, R
DT
= 10 kW)
12 − 1.5 − mA
VOLTAGE CONTROL OSCILLATOR (VCO)
F
SW(min)
Minimum switching frequency, Rt = 34 kW on pin 4, V
pin6
= 0.8 V,
DT = 300 ns
4 58.2 60 61.8 kHz
F
SW(max)
Maximum switching frequency, R
f(max)
= 1.9 kW on pin 2, V
pin6
>
5.3 V, Rt = 34 kW, DT = 300 ns
2 440 500 560 kHz
FB
SW
Feedback pin swing above which Df = 0
6 − 5.3 − V
DC Operating duty−cycle symmetry 11−15 48 50 52 %
T
del1
Delay before driver restart from fault or disable mode − − 700 − ns
T
del2
Delay before driver restart after V
CC(on)
event (Note 4) − − 11 −
ms
V
ref(Rt)
Reference voltage for Rt pin 4 2.18 2.3 2.42 V
FEEDBACK SECTION
R
FB
Internal pulldown resistor 6 − 20 −
kW
V
FB(min)
Voltage on pin 6 below which the FB level has no VCO action 6 − 1.1 − V
V
FB(off)
Voltage on pin 6 below which the controller considers the FB fault 6 240 280 320 mV
V
FBoff(hyste)
Feedback fault comparator hysteresis 6 − 45 − mV
DRIVE OUTPUT
T
r
Output voltage risetime @ C
L
= 1 nF, 10−90% of output signal 15−14/11−10 − 40 − ns
T
f
Output voltage falltime @ C
L
= 1 nF, 10−90% of output signal 15−14/11−10 − 20 − ns
R
OH
Source resistance 15−14/11−10 − 13 −
W
R
OL
Sink resistance 15−14/11−10 − 5.5 −
W
T
dead
Deadtime with R
DT
= 10 kW from pin 7 to GND
7 250 290 340 ns
T
dead(max)
Maximum deadtime with R
DT
= 82 kW from pin 7 to GND
7 − 2 −
ms
T
dead(min)
Minimum deadtime, R
DT
= 3 kW from pin 7 to GND
7 − 100 − ns
I
HV(LEAK)
Leakage current on high voltage pins to GND 14, 15,16 − − 5
mA
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.
3. The IC does not activate soft−start (unless the feedback pin voltage is below 0.3 V) when the skip/disable input is released, this is for skip
cycle implementation.
4. Guaranteed by design.
