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参数资料
| 型号： | GM3845AD8T |
| 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： | 5/19页 |
| 文件大小： | 304K |
| 代理商： | GM3845AD8T |
8
4
2
1
R2
R1
C
+
-
Error
Amplifier
R
Internal
Bias
Oscillator
1.0mA
2R
Vcalmp
R
5
5.0 Vref
+
-
+
-
+
-
+
-
VCC 7
VCC
VIN
7
6
5
3
+
-
R
S
Q
Q1
RS
Comp/ Latch
1.0V
Figure 14. Adjustable buffered reduction of clamp level with soft-start
5.0 Vref
+
-
+
-
+
-
+
-
7
6
5
3
5
R
1.0V
+
-
R
S
Q
VCC
VIN
VCC
RS
SENSEFET
D
G
M
K
S
Power Ground to
Input Source Retum
Control Circuitry Ground
Comp/ Latch
Figure 15. Current sensing power mosfet
For proper operation during over current
conditions, a reduction of the Ipk(max)
clamp level must be implemented.
Refer to Figures 11 and 12.
1/4W
V=
clamp
1.67
(
+ 1)
R2
R1
I=
PK(max)
where: 0
V
1.0V
clamp
t
= -ln [ 1-
]
softstart
C
V
clamp
RS
V
C
3V
clamp
R1 + R2
V
5=
PIN
If= SENSEFET= MTP10N10M
= 200
Then :
R
S
V
5= 0.075 l
PIN
PK
R I
R
S PK
DS(on)
RR
DS(on) +
S
G
M
3
8
4
2
A
,
G
M
3
8
4
3
A
,
G
M
3
8
4
A
,
G
M
3
8
4
5
A
13
MPSA63
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|---|---|
| GM3845AS8R | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| GM3845AS8T | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| GM3845AS8R | 制造商:GAMMA 制造商全称:GAMMA 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| GM3845AS8T | 制造商:GAMMA 制造商全称:GAMMA 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| GM38863-21 | 制造商:ITT Interconnect Solutions 功能描述:038863-0021 - Bulk |
| GM38C42 | 制造商:GAMMA 制造商全称:GAMMA 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| GM38C42D8T | 制造商:GAMMA 制造商全称:GAMMA 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
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