2024年6月1日发(作者：恽慧心)
Sheet1
Design:jackie_yuan
output power
Estimated efficiency
Estimated efficiency
Vin(rms-max)
Vin(rms-min)
Vo-PFC
switch frequency
Estimated Brown out point
Calculated Brown out point
Estimated C1 hold time
Set f1 for C114
Set f2 for C112
VRMS(LV_min)
Set R124
Calculated R3A+R3B+R3C
Selected R3A+R3B+R3C
Set R123
Calculated R124/R total
Rmul
Gain max
V Gain-max
V Ea-max
Selected R2A+R2B+R2C
Iac
set VEA
pin power
input current peak-max
Estimated L current di
Selected di
L current max
D-pfc(max)
PFC Choke Lc
Bulk C
Slected C1
Pout=
ηpfc=
ηpwm=
Vin max=
Vin min=
Vo-PFC=
f=
V brown out=
V brown out=
T hold=
f1=
f2=
VRMS(LV_min)=
R124=
R3A+R3B+R3C=
R3A+R3B+R3C=
R123=
R ate=
Rmul=
Gain max=
V gain-max=
V Ea-max=
R2A+R2B+R2C=
I ac-min=
VEA=
300
0.92
0.9
264
90
387
73.6
74
75.2
30
15
23
1.05
37.4
2173
2040
200
1.58%
5.5
8.996
0.88
6
6
17.7
4.5
W
V
V
V
Khz
V
V
ms
Hz
Hz
V
kΩ
kΩ
kΩ
kΩ
kΩ
V
MΩ
uA
V
W
A
A
A
A
mH
uF
uF
kΩ
pF
kΩ
MΩ
uA
uF
set RT,CT determine F
FBPFC 电阻选择
Calculated Ix
Calculated C114
Pin=
326.1
Iin(peak_max)=
5.12
di=
1.3
di=
0.42
IL(max)=
5.33
D-pfc=
0.67
Lc=
2.76
C1=
139
C1=
150
RT=
13.7
CT=
470
R118=
25.5
R4C+R4B+R4A=
3.92
Ix=
98.04
C114=0.049576553
Page 1
Sheet1
Calculated C112
Calculated R sense
Selected R sense
C112=1000.032333
R sense=
0.14
R sense=
0.05
pF
Ω
Ω
以下為FAN4800A相關參數：
V
RMS(LV
_
min)
=1.05V
R
mul
= 5.5KΩ
MS接腳在最低輸入電壓時的電
乘法器輸出電阻
乘法器最大增益
乘法器的最大輸出電壓
VEA最大輸出電壓
三角波最大電壓
V
EA
最高電壓
Gainmax = 8.996
VGain_max = 0.88V
V
EA_max
= 6V
VRAMP = 2.55V
VEAH = 5.8V
Page 2
2024年6月1日发(作者：恽慧心)
Sheet1
Design:jackie_yuan
output power
Estimated efficiency
Estimated efficiency
Vin(rms-max)
Vin(rms-min)
Vo-PFC
switch frequency
Estimated Brown out point
Calculated Brown out point
Estimated C1 hold time
Set f1 for C114
Set f2 for C112
VRMS(LV_min)
Set R124
Calculated R3A+R3B+R3C
Selected R3A+R3B+R3C
Set R123
Calculated R124/R total
Rmul
Gain max
V Gain-max
V Ea-max
Selected R2A+R2B+R2C
Iac
set VEA
pin power
input current peak-max
Estimated L current di
Selected di
L current max
D-pfc(max)
PFC Choke Lc
Bulk C
Slected C1
Pout=
ηpfc=
ηpwm=
Vin max=
Vin min=
Vo-PFC=
f=
V brown out=
V brown out=
T hold=
f1=
f2=
VRMS(LV_min)=
R124=
R3A+R3B+R3C=
R3A+R3B+R3C=
R123=
R ate=
Rmul=
Gain max=
V gain-max=
V Ea-max=
R2A+R2B+R2C=
I ac-min=
VEA=
300
0.92
0.9
264
90
387
73.6
74
75.2
30
15
23
1.05
37.4
2173
2040
200
1.58%
5.5
8.996
0.88
6
6
17.7
4.5
W
V
V
V
Khz
V
V
ms
Hz
Hz
V
kΩ
kΩ
kΩ
kΩ
kΩ
V
MΩ
uA
V
W
A
A
A
A
mH
uF
uF
kΩ
pF
kΩ
MΩ
uA
uF
set RT,CT determine F
FBPFC 电阻选择
Calculated Ix
Calculated C114
Pin=
326.1
Iin(peak_max)=
5.12
di=
1.3
di=
0.42
IL(max)=
5.33
D-pfc=
0.67
Lc=
2.76
C1=
139
C1=
150
RT=
13.7
CT=
470
R118=
25.5
R4C+R4B+R4A=
3.92
Ix=
98.04
C114=0.049576553
Page 1
Sheet1
Calculated C112
Calculated R sense
Selected R sense
C112=1000.032333
R sense=
0.14
R sense=
0.05
pF
Ω
Ω
以下為FAN4800A相關參數：
V
RMS(LV
_
min)
=1.05V
R
mul
= 5.5KΩ
MS接腳在最低輸入電壓時的電
乘法器輸出電阻
乘法器最大增益
乘法器的最大輸出電壓
VEA最大輸出電壓
三角波最大電壓
V
EA
最高電壓
Gainmax = 8.996
VGain_max = 0.88V
V
EA_max
= 6V
VRAMP = 2.55V
VEAH = 5.8V
Page 2