NCP1237 ONSEMI [ON Semiconductor], NCP1237 Datasheet - Page 5

• Manufacturer Part Number: NCP1237
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

ELECTRICAL CHARACTERISTICS
V
HIGH VOLTAGE CURRENT SOURCE
SUPPLY
BROWN−OUT AND LINE OVERVOLTAGE
OSCILLATOR
OUTPUT DRIVER
6. Internal supply current only, current in FB pin not included (current flowing through GND pin only).
Minimum voltage for current source operation
Current flowing out of V
Off−state leakage current
Turn−on threshold level, V
HV current source stop threshold
HV current source restart threshold
Turn−off threshold level
Blanking duration on V
V
V
Internal current consumption (Note 6)
Brown−out threshold voltage
Timer duration for line cycle drop−out
Overvoltage threshold
Blanking duration on line overvoltage detection
Oscillator frequency
Maximum duty ratio
Frequency jittering amplitude, in percentage of F
Frequency jittering modulation frequency
Rise time, 10% to 90% of V
Fall time, 90% to 10% of V
Current capability
Clamping voltage (maximum gate voltage)
High−state voltage drop
CC
CC
CC
= 11 V unless otherwise noted)
decreasing level at which the internal logic resets
level for I
START1
Characteristics
to I
CC(min)
CC
START2
CC
CC
pin @ V
CC
going up
and V
transition
HV
CC(off)
= 60 V
(For typical values T
detection
OSC
http://onsemi.com
V
V
V
Guaranteed by design
DRV open, V
C
Off mode (skip or before
startup)
Fault mode (fault or latch)
V
V
V
V
Guaranteed by design
Guaranteed by design
V
C
V
C
V
C
DRV high, V
DRV low, V
V
high
V
R
CC
CC
HV
HV
HV
HV
HV
CC
CC
CC
CC
CC
drv
DRV
DRV
DRV
DRV
J
= 500 V
going up
going down
going up
going down
= 0 V
= V
= 1 nF, V
= V
= V
= V
= V
= V
= 25°C, for min/max values T
= 1 nF
= 1 nF
= 1 nF
= 33 kW, DRV high
Test Condition
CC(on)
CC(min)
CC(min)
CC(min)
CCmax
CC(min)
5
DRV
DRV
FB
FB
− 0.5 V
– 0.2 V, DRV
+ 0.2 V,
+ 0.2 V,
+ 0.2 V,
+ 0.2 V,
= V
= 3 V
= 3 V
= 0 V
CC
V
t
I
V
UVLO(blank)
V
DRV(source)
V
V
V
t
I
V
V
Symbol
V
V
DRV(clamp)
OV(blank)
DRV(sink)
I
V
V
CC(inhibit)
DRV(drop)
CC(reset)
start(off)
HV(OV1)
HV(OV2)
HV(start)
HV(stop)
D
HV(min)
I
I
CC(min)
ICC1
ICC2
ICC3
ICC4
A
J
f
F
CC(on)
CC(off)
start1
start2
t
t
OSC
t
MAX
rise
HV
jitter
jitter
= −40°C to +125°C, V
fall
11.0
Min
104
400
395
$4
0.2
9.5
8.5
4.0
0.4
2.0
2.3
0.9
0.4
97
43
60
75
85
11
−
4
−
7
−
−
−
−
−
−
1000
1000
12.0
10.5
0.65
13.5
Typ
112
105
430
425
250
$6
125
0.5
9.5
5.2
2.5
3.3
1.2
0.7
25
10
61
65
80
22
22
−
8
−
HV
= 120 V,
Max
13.0
10.5
11.5
120
460
455
165
113
$8
0.8
6.5
0.9
3.0
4.3
1.5
1.0
60
12
50
13
79
70
85
34
34
16
−
−
−
1
Unit
kHz
mA
mA
mA
ms
Hz
mA
ms
ms
ns
ns
%
%
V
V
V
V
V
V
V
V
V
V