NE5560N Просмотр технического описания (PDF) - Philips Electronics
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NE5560N Datasheet PDF : 16 Pages
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Philips Semiconductors
Switched-mode power supply control circuit
Product specification
NE/SE5560
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Graph for Determining δMAX
δ MAX (%)
100
90
80
2
70
R1
DUTY
60
CYCLE
6 CONTROL
50
R2
40
30
12
20
10
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
R2
R1 * R2
δ (%) Soft-Start Min. Duty Cycle vs R1 + R2
80
70
δMAX 90%
60 δMAX 70%
50
40 δMAX 50%
30 δMAX 30%
20
10
103
2
3 4 5 6 7 8 9 104
2
R1 + R2
(Ω)
Power Derating Curve
NE5560
Voltage-/Current-Fed
mA
Supply Characteristics
Current-Fed Dropping Resistor
1.0
VS
SE
50
NE
24
–60°C
25°C 70°C 125°C
TA
OPERATING CURVE
20
10
0
V
0
10
20
30
VCC
RVCC
1 VCC
VS * VCC
RVCC + (10 20mA)
GND
12
SEE DC ELECTRICAL
CHARACTERISTICS
FOR CURRENT FED
VCC RANGE
∆VO/VREF (%)
Regulation vs Error
Amp Closed Gain
7
6
5
4
4
R1
3
RS
–
2
3+
VREF(3.72V)
0.19
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Rf
RS + 20
Rf
RS + 100
Rf
RS + 500
0.1
δ
10 20 30 40 50 60 70 80 90
Transfer Curve of Pulse-Width
Modular Duty Cycle vs Input Voltage
δ (%)
100
90
80
70
60
50
40
30
20
10
0
1
2
3
4
5
6 V4,5,6 (V)
SL00363
Figure 4. Typical Performance Characteristics
1994 Aug 31
6
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