NCP1250ASN100T1G ONSEMI [ON Semiconductor], NCP1250ASN100T1G Datasheet - Page 5

• Manufacturer Part Number: NCP1250ASN100T1G
• Description: Current-Mode PWM Controller for Off-line Power Supplies
• Manufacturer: ONSEMI [ON Semiconductor]

ELECTRICAL CHARACTERISTICS
(For typical values T
SUPPLY SECTION − (For the best efficiency performance, we recommend a V
DRIVE OUTPUT
CURRENT COMPARATOR
INTERNAL OSCILLATOR
VCC
ICC
VCC
V
Symbol
ICCstby
V
V
VCC
V
IOPPo
IOOPv
IOOPv
V
V
IOPPs
I
DRVhigh
ICC1
ICC2
ICC3
ICC2
ICC3
source
DRVlow
T
D
ZENER
T
f
f
R
V
TSS
R
R
I
freeze
Limit1
Limit2
OSC
OSC
sink
I
DEL
LATCH
T
T
LEB
max
fold
OH
IB
lim
OL
HYST
(min)
r
f
ON
V
V
Hysteresis VCC
Clamped V
Start−up current
Internal IC consumption with I
Internal IC consumption with I
Internal IC consumption with I
Internal IC consumption with I
Current flowing into V
Internal IC consumption while in skip cycle (V
MOSFET)
Current−limit resistor in series with the latch SCR
Output voltage rise−time @ C
Output voltage fall−time @ C
Source resistance
Sink resistance
Peak source current, V
Peak sink current, V
DRV pin level at V
DRV pin level at V
Input Bias Current @ 0.8 V input level on pin 4
Maximum internal current setpoint – T
Maximum internal current setpoint – T
Default internal voltage set point for frequency foldback trip point – 45% of V
Internal peak current setpoint freeze ([31% of V
Propagation delay from current detection to gate off−state
Leading Edge Blanking Duration
Internal soft−start duration activated upon startup, auto−recovery
Setpoint decrease for pin 3 biased to –250 mV – (Note 6)
Voltage setpoint for pin 3 biased to −250 mV – (Note 6), T
Voltage setpoint for pin 3 biased to −250 mV – (Note 6), T
Setpoint decrease for pin 3 grounded
Oscillation frequency (65 kHz version)
Oscillation frequency (100 kHz version)
Maximum duty−cycle
CC
CC
T
T
J
J
increasing level at which driving pulses are authorized
decreasing level at which driving pulses are stopped
= −40C to +125C
= 0C to +125C
J
= 25C, for min/max values T
CC
when latched off / burst mode activation @ I
ON
CC
CC
− VCC
GS
CC
close to VCC
= 28 V – DRV unloaded
GS
= 12 V – (Note 5)
pin that keeps the controller latched (Note 4)
(min)
= 0 V – (Note 5)
L
FB
FB
FB
FB
L
= 1 nF, 10−90% of output signal
= 1 nF, 10−90% of output signal
= 50 mA, F
= 50 mA, F
= 50 mA, F
= 50 mA, F
(min)
J
Rating
J
J
= −40C to +125C, Max T
= 25C – pin 3 grounded
= −40C to 125C – pin 3 grounded
with a 33 kW resistor to GND
SW
SW
SW
SW
http://onsemi.com
CC
= 65 kHz and C
= 65 kHz and C
= 100 kHz and C
= 100 kHz and C
= 12 V, driving a typical 6 A/600 V
limit
)
5
J
J
CC
= 25C
= −40C to 125C
= 500 mA
L
L
L
L
= 0 nF
= 1 nF
CC
J
= 0 nF
= 1 nF
= 150C, V
below 20 V)
limit
CC
= 12 V unless otherwise noted)
Pin
5
5
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
4
4
4
3
3
4
4
−
3
3
3
3
−
−
−
0.744
0.72
0.51
0.50
Min
8.2
6.0
8.0
16
40
32
10
61
92
76
0.02
31.3
0.55
0.55
Typ
550
300
500
357
250
100
300
100
8.8
7.0
1.4
2.1
1.7
3.1
4.0
6.0
0.8
0.8
4.0
18
40
30
13
12
65
80
0
0.856
Max
0.88
0.60
0.62
150
108
9.4
2.2
3.0
2.5
4.0
20
15
14
71
84
Unit
kHz
kHz
mA
mA
mA
mA
mA
mA
mV
mV
kW
ms
mA
mA
mA
mA
ns
ns
ns
ns
%
%
%
V
V
V
V
W
W
V
V
V
V
V
V