NCP1072 ONSEMI [ON Semiconductor], NCP1072 Datasheet - Page 5

• Manufacturer Part Number: NCP1072
• Description: High-Voltage Switcher for Low Power Offline SMPS
• Manufacturer: ONSEMI [ON Semiconductor]

ELECTRICAL CHARACTERISTICS
(For typical values T
INTERNAL START−UP CURRENT SOURCE
CURRENT COMPARATOR
INTERNAL OSCILLATOR
FEEDBACK SECTION
3. The final switch current is: I
4. 130 kHz on demand only.
5. Oscillator frequency is measured with disabled jittering.
V
Symbol
I
I
R
V
I
I
I
I
I
I
FBfreeze
I
FB100%
I
I
FB(REF)
I
IPKSW
IPKSW
IPKSW
IPKSW
IPKSW
IPKSW
f
FBfault
T
D
the primary inductor in a flyback, and t
IPK(0)
IPK(0)
f
f
f
start2
f
swing
FB(up)
CCTH
I
I
T
OSC
OSC
OSC
jitter
IPK
IPK
prop
max
SS
High−voltage current source, V
VCC Transient level for Istart1 to Istart2 toggling point
Maximum internal current setpoint at 50% duty cycle
FB pin open, NCP1072, T
Maximum internal current setpoint at 50% duty cycle
FB pin open, NCP1075, T
Maximum internal current setpoint at beginning of switching cycle
FB pin open, NCP1072, T
Final switch current with a primary slope of 200 mA/ms,
F
Final switch current with a primary slope of 200 mA/ms,
F
Final switch current with a primary slope of 200mA/ms,
F
Maximum internal current setpoint at beginning of switching cycle
FB pin open, NCP1075, T
Final switch current with a primary slope of 200 mA/ms,
F
Final switch current with a primary slope of 200 mA/ms,
F
Final switch current with a primary slope of 200 mA/ms,
F
Soft−start duration (guaranteed by design)
Propagation delay from current detection to drain OFF state
Oscillation frequency, 65 kHz version, T
Oscillation frequency, 100 kHz version, T
Oscillation frequency, 130 kHz version, T
Frequency jittering in percentage of f
Jittering swing frequency
Maximum duty−cycle
FB current for which Fault is detected
FB current for which internal current set−point is 100% (I
FB current for which internal current setpoint is 97 mA (NCP1072) or
158 mA (NCP1075)
Equivalent pull−up voltage in linear regulation range
(Guaranteed by design)
Equivalent feedback resistor in linear regulation range
(Guaranteed by design)
SW
SW
SW
SW
SW
SW
= 65 kHz, NCP1072 (Note 3)
= 100 kHz, NCP1072 (Note 3)
= 130 kHz, NCP1072 (Notes 3 and 4)
= 65 kHz, NCP1075 (Note 3)
= 100 kHz, NCP1075 (Note 3)
= 130 kHz, NCP1075 (Notes 3 and 4)
J
= 25°C, for min/max values T
IPK(0)
/ (V
in
J
J
J
J
/L
= 25°C
= 25°C
= 25°C
= 25°C
prop
P
+ S
CC
the propagation delay..
Rating
a
= 0 V
) x V
OSC
J
= −40°C to +125°C, VCC = 8 V unless otherwise noted)
J
in
J
J
/L
= 25°C (Note 5)
= 25°C (Note 5)
= 25°C (Notes 4 and 5)
P
http://onsemi.com
+ V
in
/L
P
x t
5
prop
IPK(0)
, with S
)
a
the built−in slope compensation, Vin the input voltage, L
Pin
5
1
−
−
−
−
−
−
−
−
−
−
−
−
4
4
4
4
4
Min
254
467
117
59
90
62
−
19.5
Typ
250
450
282
296
293
291
508
510
500
493
100
100
130
300
−35
−44
−80
0.5
2.2
3.3
65
±6
68
1
Max
310
549
110
143
71
72
−
Unit
kHz
kHz
kHz
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
ms
Hz
kW
mA
mA
mA
ns
%
%
V
V
P