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參數(shù)資料
| 型號(hào)： | L6714TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| 中文描述： | 4英特爾VR10，VR11和AMD的6位嵌入式CPU的司機(jī)相控制器 |
| 文件頁數(shù)： | 49/70頁 |
| 文件大?。?/td> | 572K |
| 代理商： | L6714TR |
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L6714
Maximum Duty-cycle limitation
49/70
17
Maximum Duty-cycle limitation
The device limits the maximum duty cycle and this value is not fixed but it depends on the
delivered current given by the following relationship:
From the previous relationships the maximum duty cycle results:
If the desired output characteristic crosses the limited-D
MAX
maximum output voltage, the
output resulting voltage will start to drop after the cross-point. In this case the output voltage
starts to decrease following the resulting characteristic (dotted in
Figure 19
) until UVP is
detected or anyway until I
DROOP
=140
μ
A.
Figure 19. Maximum Duty-Cycle (left) and limited DMAX output voltage (right)
D
max
(
)
0.80
I
DROOP
2.857k
×
(
)
–
0.80
R
R
g
---------------------
I
×
OUT
2.857k
×
–
=
=
D
max
(
)
80%
I
DROOP
I
DROOP
0
μ
A
140
μ
A
=
40%
=
=
D
MAX
40 %
Maximum Duty Cycle
80 %
I
DROOP
= 140
μ
A
(I
OCP
OCPx
)
I
DROOP
V
OUT
0.40 V
IN
Limited D
MAX
Output Voltage
0.80 V
IN
I
OCP
= N x I
(I
DROOP
= 140
μ
A)
I
OUT
Desired output Char.
Resulting Output Char.
UVP Threshold
Limted-D
MAX
Output Char.
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