IRS2548DSTRPBF International Rectifier, IRS2548DSTRPBF Datasheet - Page 18

• Manufacturer Part Number: IRS2548DSTRPBF
• Description: IC, LED DRVR, SOIC-14
• Manufacturer: International Rectifier

Specifications of IRS2548DSTRPBF

• Led Driver Application: General Lighting
• Topology: Boost (Step Up)
• No. Of Outputs: 1
• Output Current: 500mA
• Output Voltage: 16.6V
• Dimming Control Type: PWM
• Operating Temperature Range: -55°C To +150°C
• Rohs Compliant: Yes
• Driver Case Style: SOIC
• Switching Frequency: 44.5kHz
• Msl: MSL 2 - 1 Year
• Package: 14-lead SOIC
• Circuit: PFC Ballast Control and Half-Bridge Driver
• Offset Voltage (v): 600
• Output Source Current Min (ma): 500
• Output Sink Current Min (ma): 500
• Pbf: Yes
• V Bsuv+ (v): 9.0
• V Ccuv+ (v): 12.5
• V Ccuv- (v): 10.5
• T R (ns): 120
• T F (ns): 50
• Application: SMPS/Lighting
• Lead Free Status / Rohs Status: Compliant

www.irf.com
IV. PFC Design Equations
Step1: Calculate PFC inductor value:
Step 2: Calculate peak PFC inductor current:
Step 3: Calculate PFC over-current resistor ROC value:
i
R
where,
Note: The PFC inductor must not saturate at
range. Proper core sizing and air-gapping should be considered in the inductor design.
VBUS
VAC
η
L
P
PK
f
OC
OUT
MIN
PFC
=
=
MIN
=
. 1
2
i
VAC
PK
25
⋅
(
VBUS
= Minimum rms AC input voltage
2
= DC bus voltage
= PFC efficiency (typically 0.95)
= Minimum PFC switching frequency at minimum AC input voltage
= System output power
MIN
⋅
P
where VCSTH+ = 1.25V
OUT
2
⋅
−
η
⋅
f
MIN
2
⋅
VAC
⋅
P
OUT
MIN
⋅
VBUS
)
⋅
VAC
MIN
2
⋅
η
18
i
PK
over the specified system operating temperature
[Henries]
[Amps Peak]
[Ohms]
© 2011 International Rectifier
IRS2548D