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RD8

TinySwitch™ Reference Design Board 85 to 265 VAC Input, 3 W Output

Power Integrations, Inc 

RD8

TRIPLE INSULATED SECONDARY TRANSFORMER (TRD8)

3

174 T

#34 AWG

4

9

14 T

#26 AWG

Triple-insulated

6

PIN

FUNCTION

3 HIGH-VOLTAGE DC BUS

4 TinySwitch DRAIN

6 SECONDARY RETURN

9 OUTPUT

CORE# - PC40 EE16-Z (TDK)

GAP FOR AL OF 112 nH/T2

BOBBIN# - YC-1607 (Ying Chin Co., Ltd.)

1

10

4

5

ELECTRICAL SPECIFICATIONS

Electrical Strength

60 Hz, 1 minute,

from pins 1-4 to pins 5-10

Creepage

Between pins 1-4 and pins 5-10

Primary Inductance

All windings open

Resonant Frequency

All windings open

Primary Leakage Inductance

Pins 6 and 9 shorted

NOTE: All inductance measurements should be made at 40 kHz

Figure 18. Electrical specification of transformer TRD8.

3000 VAC

6.00 mm (min)

3400 µH ±10%

420 kHz (min)

120 µH (max)

PI-2226-082498

8C

3/99

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