參數(shù)資料
型號(hào): SG3525ADWR2G
廠商: ON SEMICONDUCTOR
元件分類: 穩(wěn)壓器
英文描述: Pulse Width Modulator Control Circuit
中文描述: 0.5 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16
封裝: PLASTIC, LEAD FREE, SOIC-16
文件頁(yè)數(shù): 6/10頁(yè)
文件大?。?/td> 155K
代理商: SG3525ADWR2G
SG3525A
http://onsemi.com
6
R
,
Figure 3. Oscillator Charge Time versus R
T
Figure 4. Oscillator Discharge Time versus R
D
Figure 5. Error Amplifier Open Loop
Frequency Response
Figure 6. Output Saturation
Characteristics
2.0
5.0 10
20
50
100 200 500 1000 2000 5000 10,000
CHARGE TIME ( s)
6
5
7
R
D
*
C
T
R
T
* R
D
= 0
0.2
0.5
1.0
2.0
5.0
10
20
50
100
200
DISCHARGE TIME ( s)
,
D
R
1.0
10
100
1.0 k
10 k
100 k
1.0 M
10 M
1
2
9
C
P
R
Z
f, FREQUENCY (Hz)
,
V
A
+
R
Z
= 20 k
V
ref
R
T
C
T
Sync
Discharge
GND
16
6
5
3
7
12
Q2
Q1
Q6
Q9
2.0k
2.0k
14k
Q10
Q11
5.0pF
400 A
23k
Q4
Q7
1.0k
Q12
Q13
3.0k
250
4
Blanking
To Output
Ramp
To PWM
Q14
25k
7.4k
Q5
Q8
Q3
OSC Output
1.0k
15
Q3
V
CC
9
30
Compensation
1
2
Q4
Q1
Q2
Inverting
Input
5.8V
100 A
To PWM
Comparator
200 A
Noninverting
Input
Figure 7. Oscillator Schematic
0.01
0.02 0.03
I
O,
OUTPUT SOURCE OR SINK CURRENT (A)
0.05 0.07 0.1
0.2
0.3
0.5
0.7 1.0
,
s
V
Sink Sat, (V
OL
)
Source Sat, (V
C
V
OH
)
V
CC
= +20 V
T
J
= +25
°
C
Figure 8. Error Amplifier Schematic
200
100
50
20
10
5.0
2.0
500
400
300
200
100
0
100
80
60
40
20
0
20
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
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