IRPLHALO1E International Rectifier, IRPLHALO1E Datasheet - Page 10

• Manufacturer Part Number: IRPLHALO1E
• Description: KIT HALOGIN CONVERTER 100VA
• Manufacturer: International Rectifier

Specifications of IRPLHALO1E

• Main Purpose: Lighting, Ballast Control
• Utilized Ic / Part: IR2161
• Lead Free Status / RoHS Status: Lead free / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Other names: *IRPLHALO1E

IRPLHALO1E
Ignoring the output transformer we can assume for this calculation that the load is connected from
the half bridge to the mid point of the two output capacitors and that the voltage at this point will be
half the DC bus voltage. The RMS voltage of the DC bus is the same as that of the AC line so we
can see that the RMS voltage across the load shown in Figure 4, will be half the RMS voltage of the
line. The load is the maximum rated load of the convertor. The current in Rcs will be half the load
current given by :
Since the load is resistive the current waveform will have a sinusoidal envelope and so the peak
can be easily determined taking into account that the current is has a high frequency component
with an approximate 50% duty cycle :
Therefore:
For correct operation at maximum load the peak voltage should be 0.4V.
The calculation can be simplified by combining the formulae,
which can be simplified to:
Example
For a 100W convertor working from a 230VAC supply the current sense resistor would need to be
The nearest preferred value in the E12 range is 0.33 Ohms.
10
R
V
R
. 0
I
I
CS
CS
CS
CS
CS
141
(
(
(
100
RMS
PK
PK
)
. 0
)
2
)
230
141
0
2
I
4 .
2
P
CS
V
LOAD
2
(
V
AC
P
PK
P
V
CS
. 0
LOAD
LOAD
)
AC
I
324
CS
R
(
RMS
CS
)
www.irf.com