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DI-77

A

5/04

Power Integrations

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SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATIONS, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A

PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. The products and applications illustrated herein (including circuits external to the

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Table 1. Transformer Design Parameters.

Figure 3. Load Regulation–CV Characteristics.

Figure 2. Conducted EMI, Full-Load, 230 VAC, Power Return

Connected to "Artificial Hand" of LISN.

TRANSFORMER PARAMETERS

Core Material

TDK PC40 EE16,

A

2

Bobbin

EE16 Horizontal 10 pin

Winding Details

Core Cancellation: 26T,

2 x 36 AWG

Primary: 46T + 46T, 35 AWG

Shield: 8T, 2 x 26 AWG

Secondary: 10T, T.I.W. 24 AWG

Winding Order

(pin numbers)

Core Cancellation (1-NC),

2 x Tape, Primary (3-1), Tape,

Shield (2-NC), 2 x Tape,

Secondary (10-8)

Primary

Inductance

1.60 mH ±10%

Primary Resonant

Frequency

600 kHz (minimum)

Leakage

Inductance

50

µH (maximum)

1.0

0.15

10.0

-100.0

-20

-10

0

10

20

30

40

50

60

80

70

MHz

QP

AV

Average

Quasi Peak

10.0

9.5

8.5

9.0

Output Current (mA)

6

6.5

7.0

7.5

8.0

200

150

100

50

0

350

300

250

85 VAC

265 VAC

300

250

Input Voltage (VAC)

0

50

100

150

200

230

180

130

80

280

Figure 4. No-Load Input Power Variation with Input

Voltage.