FAN7556 Ver la hoja de datos (PDF) - Fairchild Semiconductor
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FAN7556 Datasheet PDF : 10 Pages
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FAN7556
Electrical Characteristics
(Ta = 25°C, Vcc=18V, Ct=1nF unless otherwise specified)
Parameter
Symbol
Conditions
< OSCILLATOR SECTION >
Oscillator Frequency
FOSC Tj =25°C, Ct=1nF
Frequency Change With Vcc
∆FOSC1 Vcc=10V~30V
Temperature Stability (Note1)
∆FOSC2 -25°C ≤ Ta ≤ 125°C
< PWM SECTION >
FB Source Current
IFB
VFB = 0V, VS/S = 5V
FB Threshold Voltage 1
VTH(FBO) Duty = 0%
FB Threshold Voltage 2
VTH(FBM) Duty = DMAX
Maximum Duty Cycle
DMAX
-
< SOFT START SECTION >
Soft Start Current
IS/S VFB = 5V, VS/S = 0V
Soft Start Limit Voltage
VLIM(S/S)
-
< PROTECTION SECTION >
Shutdown Feedback Voltage
VSD VFB > 5V
Shutdown Delay Current
ISD
4V ≤ VFB ≤ VSD
Over Current Protection
VOC
-
Over Voltage Protection
VOVP VFB = 3V, VS/S = 5V
Comparator Threshold Voltage
VLA
-
<UVLO SECTION>
Start Threshold Voltage
VTH(ST)
-
Min. Operating Voltage
VOPR(MIN)
-
< ON/OFF CONTROL SECTION >
On Threshold Voltage
VON VIS = 0V
Off Threshold Voltage
VOFF VFB < VON
Sink Current
ISINK VFB < VTH(FB), VS/S = 5V
<OUTPUT SECTION>
Low Output Voltage1
VOL1 Io = 50mA
Low Output Voltage2
VOL2 Io = 200mA
High Output Voltage1
VOH1 Io = -50mA
High Output Voltage2
VOH2 IO = -200mA
Rise Time (Note1)
TR
CL= 1nF, (No load)
Fall Time (Note1)
TF
CL= 1nF, (No load)
< OVERALL SECTION >
Start-Up Current
VST
-
Operating Supply Current
IOP
Vcc ≤ 30V
Off State Current
IOFF VFB < VTH(FB), VS/S < VOFF
Min.
90
-
-
-
-
-
70
-
-
5.4
3.5
0.22
30
1.7
13.2
8.2
0.2
1.2
3
-
-
13
12
-
-
-
-
-
Typ.
100
±1
±5
1.0
0.85
2.7
74
1.1
5.2
6
5
0.26
34
2
14.7
9.2
0.3
1.5
4
0.15
1.5
15
14
80
40
0.1
7
0.2
Max.
110
-
-
-
-
-
78
-
-
6.6
6.5
0.29
38
2.3
16.2
10.2
0.4
1.8
5
0.4
2.5
17
16
-
-
0.2
10
0.4
Unit
kHz
%
%
mA
V
V
%
mA
V
V
uA
V
V
V
V
V
V
V
mA
V
V
V
V
ns
ns
mA
mA
mA
Note:
1. These parameters, although guaranteed, are not 100% tested in production.
4
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