NCP1239(2005) 查看數據表（PDF） - ON Semiconductor
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NCP1239 Datasheet PDF : 38 Pages
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NCP1239
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Vpin16 = 48 V,
VCC = 20 V unless otherwise noted.)
Symbol
Rating
Pin
Min
Typ
Max
Unit
Drive Output
Vcl
Output Voltage Positive Clamp
12
11.5
13.6
16
V
Trise
Tfall
Vsource
Isource
ROL
Isink
Oscillator
fsw
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 @ Ipin12 = 3 mA and VCC = 12 V
Source Current Capability (@ Vpin12 = 0 V)
Sink Resistance @ Vpin12 =1 V
Sink Current Capability (@ Vpin12 = 10 V)
Recommended Switching Frequency Range
12
−
40
−
ns
12
−
25
−
ns
12
−
2.5
3.3
V
12
−
500
−
mA
12
−
3.8
7.5
W
12
−
800
−
mA
12
25
−
250
kHz
Vosc
Pin 4 Voltage @ Rt = 100 kW
4
−
1.6
−
V
Kosc
Product (Switching Frequency times the Rt Pin 4 resistance) (Note 1)
@ 65 kHz and 130 kHz (NCP1239F)
@ 118 kHz and 236 kHz (NCP1239V)
6050
11000
6500
11800
6950
12600
kHz*kW
Dfsw
Internal Modulation Swing, in percentage of fsw
−
±3.5
−
%
Dmax
Maximum Duty−Cycle
75.5 80.0 83.0
%
Current Limitation
ILimit
Maximum Internal Set−Point
TDEL_CS
Propagation Delay from Vpin10 > ILimit to gate turned off
(Pin 12 loaded by 1 nF)
10
0.84 0.90 0.95
V
10
−
130
220
ns
TLEB−65kHz
Leading Edge Blanking Duration (Pins 9 and 10) @ 65 kHz
(NCP1239F)
9, 10
−
420
−
ns
TLEB−130kHz
Leading Edge Blanking Duration (Pins 9 and 10) @ 130 kHz
(NCP1239F)
9, 10
−
230
−
ns
TLEB−118kHz Leading Edge Blanking Duration (Pin 10) @ 118 kHz (NCP1239V)
TLEB−236kHz Leading Edge Blanking Duration (Pin 10) @ 236 kHz (NCP1239V)
Over Power Limit (NCP1239F)
Iocp
Internal Current Source of the Over Power Limit Pin
@ 1 V on Pin 5 and Vpin9 = 0.5 V
@ 2 V on Pin 5 and Vpin9 = 0.5 V
Vopl
Over Power Limitation Threshold
@ TJ = 25°C
@ TJ = 0°C to 125°C
TDEL_OCP
Propagation Delay from Vpin9 > Vopl to gate turned off
(Pin 12 loaded by 1 nF)
10
−
320
−
ns
10
−
170
−
ns
9
mA
60
80
100
120
160
185
9
V
0.48 0.50 0.52
0.47 0.50 0.52
9
−
130
220
ns
Maximum Duty−Cycle (Dmax) Control (NCP1239V)
IDmax
Pin 9 Current Source @ Vpin9 = 1.0 V and Vpin9 = 2.0 V
9
46
55
63
mA
Dmax
Maximum Duty Cycle @ 118 kHz and Vpin9 = 1.0 V
9
20
24
29
%
KDmax
Dmax Coefficient @ 118 kHz and Vpin9 = 1.0 V (Note 2)
9
1.10 1.30 1.53 %/kW
1. The nominal switching frequency fsw equals: fsw = KOSC/Rt. The implemented jittering makes the switching frequency continuously vary
around this nominal value ($3.5% variation).
2. KDmax is the proportionality coefficient that links the maximum duty−cycle to the Pin 9 resistor: Dmax = KDmax*Rpin9. KDmax is defined in
the “Maximum Duty−Cycle Limitation” section of the operating description.
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