ncp1239f ON Semiconductor, ncp1239f Datasheet - Page 4

• Manufacturer Part Number: ncp1239f
• Description: Lowstandby High Performance Pwm Controller
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
V
Drive Output
Oscillator
Current Limitation
Over Power Limit (NCP1239F)
Maximum Duty−Cycle (Dmax) Control (NCP1239V)
1. The nominal switching frequency fsw equals: fsw = K
2. K
T
T
T
CC
T
T
LEB−130kHz
LEB−118kHz
LEB−236kHz
T
Symbol
LEB−65kHz
around this nominal value ($3.5% variation).
the “Maximum Duty−Cycle Limitation” section of the operating description.
DEL_OCP
V
I
K
Dmax
DEL_CS
I
Kosc
D
= 20 V unless otherwise noted.)
source
Vosc
Dfsw
Dmax
I
T
R
Dmax
T
source
I
V
fsw
I
Vcl
Limit
Dmax
sink
ocp
max
rise
fall
OL
opl
is the proportionality coefficient that links the maximum duty−cycle to the Pin 9 resistor: Dmax = K
Output Voltage Positive Clamp
Output Voltage Rise−Time @ CL = 1 nF, 10−90% of output signal
Output Voltage Fall−Time @ CL = 1 nF, 10−90% of output signal
High State Voltage Drop @ I
Source Current Capability (@ V
Sink Resistance @ V
Sink Current Capability (@ V
Recommended Switching Frequency Range
Pin 4 Voltage @ Rt = 100 kW
Product (Switching Frequency times the Rt Pin 4 resistance) (Note 1)
Internal Modulation Swing, in percentage of fsw
Maximum Duty−Cycle
Maximum Internal Set−Point
Propagation Delay from V
Leading Edge Blanking Duration (Pins 9 and 10) @ 65 kHz
Leading Edge Blanking Duration (Pins 9 and 10) @ 130 kHz
Leading Edge Blanking Duration (Pin 10) @ 118 kHz (NCP1239V)
Leading Edge Blanking Duration (Pin 10) @ 236 kHz (NCP1239V)
Internal Current Source of the Over Power Limit Pin
Over Power Limitation Threshold
Propagation Delay from V
Pin 9 Current Source @ V
Maximum Duty Cycle @ 118 kHz and V
Dmax Coefficient @ 118 kHz and V
@ 65 kHz and 130 kHz (NCP1239F)
@ 118 kHz and 236 kHz (NCP1239V)
(Pin 12 loaded by 1 nF)
(NCP1239F)
(NCP1239F)
@ 1 V on Pin 5 and V
@ 2 V on Pin 5 and V
@ T
@ T
(Pin 12 loaded by 1 nF)
J
J
= 25°C
= 0°C to 125°C
pin12
pin9
pin9
(For typical values T
pin10
pin9
pin9
=1 V
= 0.5 V
= 0.5 V
pin12
pin12
> V
Rating
= 1.0 V and V
> I
pin12
opl
= 3 mA and V
Limit
= 10 V)
pin9
to gate turned off
= 0 V)
OSC
to gate turned off
http://onsemi.com
pin9
= 1.0 V (Note 2)
/Rt. The implemented jittering makes the switching frequency continuously vary
= 1.0 V
NCP1239
J
pin9
= 25°C, for min/max values T
CC
= 2.0 V
4
= 12 V
9, 10
9, 10
Pin
12
12
12
12
12
12
12
12
10
10
10
10
4
9
9
9
9
9
9
J
= 0°C to +125°C, V
11000
6050
75.5
0.84
0.48
0.47
1.10
11.5
Min
120
25
60
46
20
−
−
−
−
−
−
−
−
−
−
−
−
−
−
Dmax
11800
6500
13.6
±3.5
80.0
0.90
0.50
0.50
1.30
Typ
500
800
130
420
230
320
170
160
130
2.5
3.8
1.6
*R
40
25
80
55
24
−
pin9
pin16
. K
= 48 V,
12600
Dmax
6950
Max
83.0
0.95
0.52
0.52
1.53
250
220
100
185
220
3.3
7.5
16
63
29
−
−
−
−
−
−
−
−
−
−
is defined in
kHz*kW
%/kW
Unit
kHz
mA
mA
mA
mA
ns
ns
ns
ns
ns
ns
ns
ns
W
%
%
%
V
V
V
V
V