July 1999 TOKO, Inc.

Page 9

TK11052

APPLICATION HINTS (CONT.)

V

R

(0.4925 + T

1183 x T

SH

IN1

OUT1

IN2

OUT2

VCC

GND

Vref

NC

36 k

Ω

62 k

Ω

31.8 k

Ω 78.1 kΩ

VCC

300 k

Ω

VCC

Protected

Circuit

Temperature (

°C)

010

80

90

OUT1

OUT2

OUT1 + OUT2

"H"

"L"

"L"

"H"

"L"

"L"

"H"

=

181.07 - (T

(9)

80.74 + (T

1183 x T

SH

R

181.07 - (T

1183 x T

SH

R

Example:

R

≈ 78.1 kΩ

≈ 31.8 kΩ

Thermostat IC Application

Example:

• WINDOW TYPE OUTPUT

The following application protects the circuit within the operating temperature range of 0 to 85

°C. When the temperature

is 0

°C or less, or 85 °C or more, the N channel Mos transistor is turned OFF.

When the temperature returns to between 5 and 80

°C by the hysteresis function, the N channel Mos transistor is turned

ON.

• TEMPERATURE FUSE

The following application is a temperature fuse circuit. The output of the TK11052M becomes a High Level when the

surrounding temperature exceeds 85

°C and the P channel Mos transistor is turned off. Even if the surrounding

temperature drops, the P channel Mos transistor remains off.

IN1

OUT1

IN2

OUT2

VCC

GND

Vref

NC

62 k

Ω

VCC

300 k

Ω

VCC

Protected

Circuit

Temperature (

°C)

010

80

90

OUT1

OUT2

"L"

"H"

"L"

32 k

Ω

0.1 µF

VCC

1.011 V