Datasheet

Power transformer specification AN2838

20/23 DocID15099 Rev 2

8 Power transformer specification

• Transformer type: open

– Winding type: layer

– Coil former: vertical type, 6 + 6 pins

– Mains insulation: 4 kV

– Unit finishing: varnished

Electrical characteristics (all measurements taken with pins 10 and 11 shorted)

• Converter topology: flyback, TM mode

• Core type: ETD29

• Min. operating frequency: 36 kHz

• Primary inductance: 550 mH 10% @ 1 kHz - 0.25 V

(a)

• Leakage inductance: 4.5 mH@ 50 kHz - 0.25 V

(b)

• Parasitic capacitance: 7 pF max.

• Max. peak primary current: 1.9 A

• Turn ratio:

– Pin 9-12 / 8-7: 10.55 ± 5%

– Pin 9-12 / 5/4-3/2: 3.8 ± 5%

Figure 28. Power transformer

a. Measured between pins (9-12)

b. Measured between pins (9-12) with all secondary windings shorted

Manufacturer: Magnetica

P/N: 4126