5V

5V

LM27

V+

VTEMP

R1

(10k)

0.1

OS

Heater

Heater

Supply

GND

HYST

5V

5V

5V Fan

MC05J3

Comair-Rotron

IC2

LM27

V+

VTEMP

GND

HYST

OS

100k

NDS356P

8:

IC1

LM3886

47k

20k

1k

THERMALLY COUPLED

+28V

-28V

-

+

Audio

Input

10PF

3.3PF

1N4001

0.1PF

5V

Vout

12V

TOYO

USTF802512HW

LM27

V+

VTEMP

GND

HYST

R1

(10k)

0.1

OS

1N4001

2N2222

OBSOLETE

LM27A

SNOSAQ6D – MAY 2005 – REVISED APRIL 2013

www.ti.com

Figure 5. Fan Low Side Drive

Figure 6. Audio Power Amplifier Thermal Protection

Figure 7. Simple Thermostat

8

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