NE5561 查看數據表（PDF） - Philips Electronics
零件编号
产品描述 (功能)
生产厂家
NE5561 Datasheet PDF : 5 Pages
| |||
Philips Semiconductors
Switched-mode power supply control circuit
Product specification
NE/SE5561
TYPICAL PERFORMANCE CHARACTERISTICS
Error Amplifier
Open-Loop Gain
60
0
50
–30
40
–60
30
–90
20
10
0
1k
10k 100k
1M
10M
FREQUENCY (Hz)
–120
–150
–180
1k
Error Amplifier
Open-Loop Phase
10k 100k
1M
10M
FREQUENCY (Hz)
Transfer Curve of Pulse-Width
Modulator Duty Cycle vs Input Voltage
100
90
80
70
60
50
40
30
20
10
0
01
2
3
456
V4
Power Derating Curve
1.25
PT = VCC ICC + (VCC – VZ) IZ
1.00
+ [V7 I7 x DUTY CYCLE]
0.75
0.50
NE
0.25
SE
0
25 50 70
100 125 150
AMBIENT TEMPERATURE (°C)
1000
100
50
30
20
10
5
3
2
1
Typical Frequency Plot vs RT and CT
R=5kΩ
R=10kΩ
R=20kΩ
R=40kΩ
RT
CT
2
NE5561
5
2 2.5 3 3.5 4 4.5
C (nF)
Maximum Duty Cycle vs
Base Voltage on Q1
100
90 δ MAX (%)
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
V1
Start-Up Circuit
V1
C
VZ
2
NE5561
R1
4
Q1
R2
Slow-Start Voltage
V4
ƪ ƫ R2
d max is a function of f R1 ) R2 VZ ) VBEQ1
t = R’C
Figure 3. Typical Performance Characteristics
t
SL00386
1994 Aug 31
4
Share Link: 