AN2941

PFC coil specifications

Doc ID 15447 Rev 4

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8

PFC coil specifications

General description and characteristics

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Application type: consumer, home appliances

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Transformer type: open

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Coil former: vertical type, 5+3 pins

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Max. temp. rise: 45 °C

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Max. operating ambient temperature: 60 °C

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Mains insulation: n.a.

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Unit finishing: varnished

Electrical characteristics

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Converter topology: boost, transition mode

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Core type: CQ25-PC47

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Min. operating frequency: 20 kHz

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Typical operating frequency: 80 kHz

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Electrical diagram and winding characteristics

Figure 27.

PFC coil electrical diagram

a.

Measured between pins #5 and #6

Table 7.

PFC coil winding data

Pins

Windings

RMS current

Number of turns

Wire type

8 - 3

1.

Aux winding is wound on coil former before primary winding. To be insulated with a layer of polyester tape.

5 spaced

φ 0.28 mm

5 - 6

2.

Primary winding external insulation: 2 layers of polyester tape.

50

Multistrand

10 x

φ 0.20 mm

 

5

6

PRIM.

AUX

8

3