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