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參數(shù)資料
| 型號： | MC33065-H |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | High Performance Dual Channel Current Mode Controllers |
| 中文描述： | 高性能雙通道電流模式控制器 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 583K |
| 代理商： | MC33065-H |
MC34065
H, L
http://onsemi.com
13
Figure 19. Adjustable Reduction of Clamp Level
Figure 20. Soft
Start Circuit
V
CC
Figure 21. Adjustable Reduction of Clamp Level
with Soft
Start
Figure 22. MOSFET Parasitic Oscillations
Figure 23. Current Sensing Power MOSFET
Figure 24. Current Waveform Spike Suppression
+
+
+
V
ref
1
5
1
3
2
4
5
R
1
R
2
EA1
R
R
Bias
5.0V
ref
Osc.
S
R
Q
+
_
20k
V
CC
V
in
Q1
R
S
6
7
16
V
Clamp
1.0mA
2R
R
1.0V
PWM
Latch 1
+
_
V
Clamp
≈
1.67
R2
R1
1
+ 0.33 x 10
3
(R
1
)
I
pk(max)
≈
V
Clamp
R
S
Where: 0
≤
V
Clamp
≤
1.0 V
+
+
Bias
Osc.
1.0mA
1.0M
C
15
1
3
2
4
EA1
R
1.0V
20k
R
R
V
ref
t
SoftStart
≈
2100 C in
μ
F
5
2R
C
R1R2
R1
R2
+
+
+
V
in
V
CC
16
+
_
+
_
Q1
R
S
6
7
5.0V
ref
20k
Bias
R
R
V
ref
15
1
3
2
4
5
MPSA63
R
1
R
2
C
EA1
2R
1.0V
R
V
Clamp
PWM
Latch 1
S
R
Q
I
pk(max)
≈
V
Clamp
R
S
R2
R1
1
V
Clamp
≈
1.67
Where: 0
≤
V
Clamp
≤
1.0 V
t
SoftStart
= In
Osc
+
1
1
V
C
3 V
Clamp
Series gate resistor R
may be needed to damp high frequency parasitic
oscillations caused by the MOSFET input capacitance and any series
wiring inductance in the gate
source circuit. R
will decrease the MOSFET
switching speed. Schottky diode D
1
is required if circuit ringing drives the
output pin below ground.
+
+
+
16
+
_
5.0V
ref
+
PWM
Latch 1
S
Q
R
1N5819
R
g
Q1
R
S
7
6
V
in
D
1
Virtually lossless current sensing can be achieved with the implementation of a
SENSEFET power switch. For proper operation during over current conditions, a reduction
of the I
pk(max)
clamp level must be implemented. Refer to Figures 19 and 21.
_
+
_
+
+
_
+
S
R
Q
V
CC
V
in
5.0V
ref
PWM
Latch 1
7
6
R
S
1/4W
D
S
K
M
G
SENSEFET
Power Ground to
Input Source Return
Drive Ground
to Pin 9
Control Circuitry Ground
to Pin 8
If: SENSEFET = MTP10N10M
R
S
= 200
Then: V
Pin6
= 0.075 I
pk
V
Pin6
≈
+
_
16
r
DM(on)
+ R
S
R
S
I
pk
r
DS(on)
The addition of the RC filter will eliminate instability caused by the leading
edge spike on the current waveform.
_
+
+
_
_
+
+
_
V
in
Q1
R
S
+
5.0V
ref
S
R
Q
PWM
Latch 1
V
CC
7
6
16
C
R
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC33065-L | High Performance Dual Channel Current Mode Controllers |
| MC33067DWG | High Performance Resonant Mode Controllers |
| MC33067DWR2 | High Performance Resonant Mode Controllers |
| MC33067DWR2G | High Performance Resonant Mode Controllers |
| MC33067PG | High Performance Resonant Mode Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33065-L | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Dual Channel Current Mode Controllers |
| MC33065P | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLER |
| MC33065P-H | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Dual Channel Current Mode Controllers |
| MC33065P-L | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Dual Channel Current Mode Controllers |
| MC33066 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High Performance Resonant Mode Controllers |
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