User guide

UM10533 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
User manual Rev. 1 — 21 May 2012 18 of 23
NXP Semiconductors
UM10533
TEA1723BT GreenChip SP SMPS demo board
9. Transformer specifications
9.1 Transformer schematic design and winding construction
The transformer used in the TEA1723BT demo board has size EE20 with bobbin
EE20/10/6 horizontal, 14-pin. The secondary side of the transformer is connected in
parallel in the TEA1723BT demo board, see Figure 16
.
• Würth-Midcom 760871112
9.2 Electrical characteristics
Fig 16. Transformer schematic design
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Table 5. Electrical characteristics
Description Pin Specifications Comments
Primary inductance 1 to 3 0.9 mH 10 % -
Leakage 1 to 3 50 µH secondary side short-circuited