參數(shù)資料
型號: IRP2166
廠商: International Rectifier
元件分類: 基準電壓源/電流源
英文描述: PFC & BALLAST CONTROL IC
中文描述: 功率因數(shù)校正
文件頁數(shù): 30/32頁
文件大?。?/td> 616K
代理商: IRP2166
IR2166 & (PbF)
30
www.irf.com
PFC Design Equations
Step1:
Calculate
PFC inductor value:
VBUS
P
f
VAC
VAC
VBUS
L
OUT
MIN
MIN
MIN
PFC
=
2
)
2
(
2
η
[Henries]
(1)
where,
VBUS
VAC
η
f
P
=
DC bus voltage
=
M inim um rm s AC input voltage
=
PFC efficiency (typically 0.95)
=
M inim um PFC switching frequency at m inim um AC input voltage
=
Ballast output power
MIN
MIN
OUT
Step 2:
Calculate
peak PFC inductor current:
η
=
MIN
OUT
PK
VAC
P
i
2
2
[Amps Peak] (2)
Note: The PFC inductor m ust not saturate at
Proper core sizing and air-gapping should be considered in the inductor design.
PK
i
over the specified ballast operating tem perature range.
Step 3:
Calculate
m axim um on-tim e:
η
=
2
MIN
2
PFC
OUT
ON
VAC
L
P
t
MAX
[Seconds]
(3)
Step 4:
Calculate
m axim um COM P voltage:
6
9
=
E
t
V
MAX
ON
MAX
COMP
[Volts]
(4)
Step 5: Select zener diode DCO M P value:
COMP
D
zener voltage
MAX
COMP
V
[Volts] (5)
Step 6: Calculate resistor RSUPPLY value:
IQCCUV
VAC
R
PK
MIN
SUPPLY
10
+
=
[Ohms] (6)
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