0.1 µF

10µF

MBR0520L

MBR0520L

1:2.2

10 µF

3

1

D2

SN6501

D1

Vcc

5

2

GND2 GND1

4

3.3 V

IN

EN

GND

OUT

1

5

2

3

TPS76350

10µF

ISO 5V

Vcc1

Vcc2

GND1

GND2

B

A

16

13

12

2,7,8

9,10,15

U0Rx

VDD

PA2

PA3

U0Tx

GND

11

13

14

12

8,18,21

RST

OSC0

OSC1

LDO

5

9

10

6

7,17,22

STELLARIS

LM3S102

0.1 µF

1µF

0.1 µF

1 µF

18pF

18pF

6MHz

R

RE

DE

D

1

3

4

5

6

0.1 µF

0.1 µF

ISO3082

ISO3088

ISO-BARRIER

4.7 nF/

2kV

SM712

10 W(opt)

(opt)

10 W

SN6501

SLLSEA0C – FEBRUARY 2012 – REVISED MARCH 2012

www.ti.com

APPLICATION CIRCUITS

The following application circuits are shown for a 3.3 V input supply commonly taken from the local, regulated

micro-controller supply. For 5 V input voltages requiring different turn ratios refer to the transformer

manufacturers and their websites listed in Table 2.

Table 2. Transformer Manufacturers

Coilcraft Inc.

http://www.coilcraft.com

Halo-Electronics Inc.

http://www.haloelectronics.com

Murata Power Solutions

http://www.murata-ps.com

Wurth Electronics Midcom Inc

http://www.midcom-inc.com

Figure 40. Isolated RS-485 Interface

16

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