IRS2548DSPBF International Rectifier, IRS2548DSPBF Datasheet - Page 18
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IRS2548DSPBF
Manufacturer Part Number
IRS2548DSPBF
Description
IC, LED DRVR, SOIC
Manufacturer
International Rectifier
Datasheet
1.IRS2548DSTRPBF.pdf
(22 pages)
Specifications of IRS2548DSPBF
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
Driver Case Style
SOIC
Switching Frequency
44.5kHz
Rohs Compliant
Yes
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
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