IRS2500SPBF International Rectifier, IRS2500SPBF Datasheet - Page 16

• Manufacturer Part Number: IRS2500SPBF
• Description: PFC SMPS control IC designed to drive Boost or Flyback switching regulators providing high power factor
• Manufacturer: International Rectifier

Specifications of IRS2500SPBF

• Channels: 2
• Topology: PFC IC
• Application: SMPS/Lighting
• Io+ (ma): 500
• Io- (ma): 500
• Over Current Protection: Yes
• Vbsuv+ / Vccuv+ Min (v): 11.5
• Vbsuv+ / Vccuv+ Typ (v): 12.5
• Vbsuv+ / Vccuv+ Max (v): 13.5
• Vbsuv- / Vccuv- Min (v): 9.5
• Vbsuv- / Vccuv- Typ (v): 10.5
• Vbsuv- / Vccuv- Max (v): 11.5
• T On Typ (ns): 60
• T On Max (ns): 110
• T Off Typ (ns): 30
• T Off Max (ns): 70
• Package: 8-Lead SOIC
• Part Status: Active & Preferred

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PFC Design Equations (for Boost Converter)
Step1: Calculate PFC inductor value:
Step 2: Calculate peak PFC inductor current:
Step 3: Calculate PFC over-current resistor ROC value:
Step 4: Calculate start-up resistor RVCC value:
i
R
where,
η
Note: The PFC inductor must not saturate at
and air-gapping should be considered in the inductor design.
VBUS
VAC
L
P
PK
f
R
OC
OUT
MIN
PFC
VCC
=
=
MIN
=
VOCTH
2
VAC
=
⋅
(
i
VAC
VBUS
PK
2
=
=
=
=
=
IQCCUV
MIN
⋅
P
MIN
Minimum rms AC input voltage
DC bus voltage
PFC efficiency (typically 0.95)
Minimum PFC switching frequency at minimum AC input voltage
Ballast output power
OUT
2
⋅
−
η
⋅
PK
f
MIN
where VOCTH = 1.1V
2
+
⋅
10
VAC
⋅
P
OUT
MIN
⋅
VBUS
)
⋅
VAC
i
PK
MIN
2
over the specified ballast operating temperature range. Proper core sizing
⋅
η
16
[Amps Peak]
[Ohms]
[Henries]
[Ohms]
(4)
(2)
(3)
(1)
© 2012 International Rectifier
IRS2500S