FAN302UL View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN302UL

PWM Controller for Low Standby Power Battery Charger Applications — mWSaver™ Technology

Fairchild Semiconductor 

Typical Application Circuit (Continued)

Transformer Specification

 Core: EI12.5

 Bobbin: EI12.5

Figure 44.Transformer

 W1 is space winding in one layer.

 W2 consists of three layers with different numbers of turns. The number of turns of each layer is specified in

Table 1.

 W3 consists of two layers with triple-insulated wire. The leads of positive and negative fly lines are 3.5cm and

2.5cm, respectively.

Table 1. Transformer Winding Specifications

Terminal

No.

Start Pin

End Pin

W1

1

2

W2

4

5

W3

Fly+

Fly-

Wire

2UEW 0.15*2

2UEW 0.12*1

TEX-E 0.4*1

Turns

8

22

22

22

5

Insulation

Turns

2

0

1

3

3

Primary-Side Inductance

Primary-Side Effective Leakage Inductance

Pin

4－5

4－5

Specifications

Remark

530μH ±7% 100kHz, 1V

52μH ±5%

Short One of the Secondary Windings

© 2011 Fairchild Semiconductor Corporation

FAN302UL • Rev. 1.0.3

17

www.fairchildsemi.com

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