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参数资料
| 型号： | GM38C45S8T |
| 厂商： | American Power Management Inc. |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| 中文描述： | 高性能电流模式PWM控制器 |
| 文件页数： | 8/11页 |
| 文件大小： | 166K |
| 代理商： | GM38C45S8T |
6
G
M
3
8
C
4
2
,
G
M
3
8
C
4
3
,
G
M
3
8
C
4
,
G
M
3
8
C
4
5
TYPICAL PERFORMANCE CHARACTERISTICS
100
10
1
4
5
1x10
5x10
OSCILLATOR FREQUENCY (Hz)
R
E
S
IS
T
A
N
C
E
(k
W
)
T
200pF
470pF
1nF
1.8nF
4.7nF
10nF
V
= 15V
DD
Figure 1. Oscillator Frequency Configuration
100
10
1
4
5
6
1x10
FREQUENCY (Hz)
O
U
T
P
U
T
D
E
A
D
T
IM
E
(%
)
200pF
470pF
1nF
18nF
4.7nF
10nF
V
= 15V
DD
Figure 2. GM38C42, GM38C43 Output Dead Time
vs. Oscillator Frequency
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
-60
-30
0
30
60
90
120
150
TEMPERATURE (°C)
O
S
C
.
D
IS
C
H
A
R
G
E
C
U
R
E
N
T
(m
A
)
Figure 3. Oscillator Discharge Current vs.
Temperature
V
= 15V
DD
V
= 2V
OSC
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
2
4
6
8
ERROR AMPLIFIER OUTPUT (V)
C
U
R
E
N
T
S
E
N
S
E
A
M
P
T
H
R
E
S
H
O
L
D
(V
)
125°C
-50°C
25°C
Figure 4. Current Sense Amplifier vs.
Error Amplifier Output
120
100
80
60
40
20
0
-60
-30
0
30
60
90
120
150
TEMPERATURE (°C)
V
S
H
O
R
T
C
U
R
C
U
IT
C
U
R
E
N
T
(m
A
)
R
E
F
Figure 5. Short - Circuit Reference Current vs.
Temperature
V
= 15V
DD
25
20
15
10
5
0
-5
-10
-15
0.0
0.2
0.4
0.6
0.8
1.0
TIME (S)
O
U
T
P
U
T
V
O
L
T
A
G
E
(V
)
Figure 6. GM38C4X Output Waveform
V = 15V
D
C = 1nF
L
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