參數(shù)資料
型號: IRS2168DPBF
廠商: International Rectifier
英文描述: ADVANCED PFC + BALLAST CONTROL IC
中文描述: 先進(jìn)PFC的鎮(zhèn)流器控制IC
文件頁數(shù): 18/21頁
文件大?。?/td> 313K
代理商: IRS2168DPBF
IRS2168D(S)PbF
www.irf.com Page 18
IV. PFC Design Equations
Step1:
Calculate
PFC inductor value:
e
L
=
OUT
P
RMS
RMS
PFC
VAC
VAC
2
VBUS
(
2
)
2
)
8
η
[H]
(1)
where,
VBUS
=
DC bus voltage
VAC
=
Nominal rms AC input voltage
η
=
PFC efficiency (typically 0.95)
P
=
Ballast output power
Step 2:
Calculate
peak PFC inductor current:
RMS
OUT
η
=
MIN
OUT
P
PK
VAC
i
2
2
[A] (peak) (2)
where,
MIN
VAC
=
Minimum rms AC input voltage
Note: The PFC inductor must not saturate at
PK
Proper core sizing and air-gapping should be considered in the inductor design.
i
over the specified ballast operating temperature range.
Step 3:
Calculate
PFC over-current resistor ROC value:
PK
i
OC
R
2
=
[
] (3)
Step 4: Calculate start-up resistor R
VCC
value:
IQCCUV
VAC
R
PK
MIN
VCC
10
+
=
[
] (4)
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