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| 型号： | CS1500-FSZ |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 稳压器 |
| 中文描述： | 0.5 A POWER FACTOR CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, LEAD FREE, MS-012, SOIC-8 |
| 文件页数： | 3/14页 |
| 文件大小： | 201K |
| 代理商： | CS1500-FSZ |
CS1500
DS849F1
11
Nov ?$shortyear>
CONFIDENTIAL
6. SUMMARY OF EQUATIONS
Eq. #
Equation
Variables/Recommended Values
1
Output Power (page 9)
Po
rated output power of the system
η
efficiency of the boost converter (estimated as
100% by the PFC algorithm)
Vin(min) minimum RMS line voltage is 90V, measured
after the rectifier and EMI filter
Vlink
nominal PFC output voltage must be 400 V
fmax
maximum switching frequency is 70 kHz
LB
boost
inductor
specified
by
rated
power
requirement
α
margin factor to guarantee rated output power
(Po) against boost inductor tolerances.
2
Output Power w/ required values (page 9)
3
Boost Inductor (page 9)
4
Output IFB Sense Resistor (page 9)
5
Input IAC Sense Resistor (page 9)
6
Boost Inductor Peak Current
7
Boost Inductor RMS Current
8
Vlink Voltage Ripple
Cout
Value of the output capacitor in microfarads.
fline(min)
Minimum line frequency.
Po
αη
V
in min
()
×
2
×
V
link
V
in min
()
2
×
()
–
2f
max
L
B
V
link
×
---------------------------------------------------------
×
=
Po
αη
V
in min
()
×
2
×
400V
V
in min
()
2
×
()
–
270kHz
L
B
400V
×
-------------------------------------------------------------
×
=
L
B
αη
V
in min
()
×
2
×
400V
V
in min
()
2
×
()
–
270kHz
Po
400V
×
-------------------------------------------------------------
×
=
R
IFB
V
link
V
dd
–
I
fixed
----------------------------
400V
V
dd
–
129
μA
------------------------------
==
R
IAC
R
IFB
=
I
LB pk
()
4P
O
×
η V
×
in min
()
2
×
--------------------------------------------
=
I
LB rms
()
P
O
V
in min
()
η
×
------------------------------
=
ΔV
link rip
()
P
O
2
π f
line min
()
×
400
×
C
out
×
----------------------------------------------------------------------
=
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