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APEC2007 数据表(PDF) 9 Page - Power Integrations, Inc.

部件名 APEC2007
功能描述  Energy-Efficient Peak-Current Controlled Power Conversion IC Family Delivers 3 to 28 Watts in Universal-Input
PDF  19 Pages
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制造商  POWERINT [Power Integrations, Inc.]
网页  http://www.powerint.com
标志 POWERINT - Power Integrations, Inc.

APEC2007 数据表(HTML) 9 Page - Power Integrations, Inc.

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APEC 2007 Session T8: Semiconductor Devices
Slide# 9
Defining State Machine State-Change Criteria
Case
Power & fs are minimum. Pertinent to
the intermediate and the full ILIMIT states
Power delivery and fs are at a maximum. Pertinent to the
intermediate ILIMIT states and the lowest ILIMIT state
DCM
only
One switching cycle followed by
)
1
(
−
n
skipped cycles,
clk
s
f
n
f
)
1
(
=
, uses Equation 3:
clk
state
LIM
f
LI
n
P
2
min
2
1
)
1
(
−
=
)
1
(
−
n
switching cycles followed by one skipped cycle,
clk
s
f
n
n
f
)
1
(
−
=
, uses Equation 3:
clk
state
LIM
f
LI
n
n
P
2
max
2
1
)
1
(
−
−
=
DCM
@
min
fs
CCM
@
max
fs
One switching cycle followed by
)
1
(
−
n
skipped cycles,
clk
s
f
n
f
)
1
(
=
, uses Equation 3:
clk
state
LIM
f
LI
n
P
2
min
2
1
)
1
(
−
=
)
1
(
−
n
switching cycles followed by one skipped cycle, in CCM
(involves accounting for the perturbation as a result of the skipped
cycle), uses Equation 6:
]
)
)
(
)
0
(
)
||
(
(
)
1
[(
)
(
2
2
0
^
0
1
1
2
max
i
IN
L
L
IN
L
s
n
i
LIM
LIM
clk
V
n
V
i
V
n
V
L
T
I
I
n
T
n
L
P
−
+
−
−
−
=
∑
−
=
CCM
only
One switching cycle followed by
)
1
(
−
n
skipped cycles, but IL ≠ zero, even during
)
1
(
−
n
skipped cycles.
∴ converter is always
in CCM,
clk
s
f
n
f
)
1
(
=
, uses Equation 4:
)]
2
)(
||
(
)[
||
(
min
clk
IN
L
O
state
LIM
IN
L
O
Lf
n
V
n
V
I
V
n
V
P
−
=
−
)
1
(
−
n
switching cycles followed by one skipped cycle, in CCM
(involves accounting for the perturbation as a result of the skipped
cycle), uses Equation 6:
]
)
)
(
)
0
(
)
||
(
(
)
1
[(
)
(
2
2
0
^
0
1
1
2
max
i
IN
L
L
IN
L
s
n
i
LIM
LIM
clk
V
n
V
i
V
n
V
L
T
I
I
n
T
n
L
P
−
+
−
−
−
=
∑
−
=
fclk is the internal IC oscillator (clocking) frequency



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