IRPLCFL3 International Rectifier, IRPLCFL3 Datasheet - Page 8

• Manufacturer Part Number: IRPLCFL3
• Description: KIT DESIGN CFL TRIAC DIMMING
• Manufacturer: International Rectifier

Specifications of IRPLCFL3

• Main Purpose: Lighting, Ballast Control
• Utilized Ic / Part: IR2156
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Other names: *IRPLCFL3

IRPLCFL3
Then when the ballast is being run a true RMS digital voltmeter can be connected
across one cathode and the voltage can be observed at maximum and minimum
brightness. The cathode voltage increases as the ballast is dimmed. The values of C17
and C18 will control how much it increases by, reducing the capacitance will reduce the
amount by which the voltage rises. The values should be chosen to prevent the voltage
exceeding the upper limit at minimum output.
It is important to bear in mind that using additional windings on the inductor to provide
cathode heating means that power is now being transferred through the core and
consequently the core losses will increase and hence the core operating temperature.
The core will reach its highest operating temperature when the ballast is running at
minimum brightness.
The following component values have been selected for a 26W compact lamp.
The circuit will need to be optimized for the particular lamp used to obtain best
performance.
Demo Board Connections
The CFL3 demo board has two long leads for connection to the 120VAC mains supply.
The board must not be connected to a supply greater than 120V. There are four output
connections to be connected to a compact lamp. These are located at the opposite side
of the board. The two upper connections go to one lamp cathode and the two lower
connections go to the other lamp cathode.
PHASE CUT
LINE VOLTAGE
TRIAC
DIMMER
120VAC
CFL3 BOARD
LAMP
LINE
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