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参数资料
| 型号： | PWM5031-001-2S |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CDSO24 |
| 封装： | 0.600 X 0.300 INCH, 0.130 INCH HEIGHT, HERMETIC SEALED, CERAMIC, SOP-24 |
| 文件页数： | 19/19页 |
| 文件大小： | 236K |
| 代理商： | PWM5031-001-2S |
9
SCD5031 Rev L 11/3/08
Aeroflex Plainview
Dead Time
The amount of dead time determines the maximum duty cycle that can be achieved. The Dead Time and the frequency of
operation will determine the duty cycle.
Selecting Rset and Cset
To select values for Rset and Cset perform the following steps to insure the smallest Dead Time..
1) Determine what frequency is required for your design.
2) Use Figure 4 to select a capacitor value for Cset that will provide the highest duty cycle (shortest Dead Time) at
the frequency required.
3) Calculate the value of Rset using the formula:
Note small values of Rset increase power consumption for the PWM5031 and small values of Cset may make PCB and
stray capacitance a source of error.
Dead Time
5280 C
set
12pF
+
()
=
Duty Cycle
1
Dead Time
1 F
osc
-----------------------------
–
=
R
set
1
.84
F
osc
×
C
set
×
-----------------------------------------
=
10K
100K
Duty Cycle
1M
%
86
100
98
96
94
92
90
88
47pF
100pF
200pF
20pF
10pF
390pF
Frequency Hz
FIGURE 4 – Duty Cycle vs Frequency
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| PWM5031-7 | 制造商:AEROFLEX 制造商全称:AEROFLEX 功能描述:RadHard High Speed PWM Controller |
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