TK11051 データシートの表示（PDF） - Toko America Inc

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TK11051

TEMPERATURE SENSOR IC

Toko America Inc  

APPLICATION HINTS (CONT.)

2. For Set Temperatures < 25 °C

R1 =

Vref x TSH

(TSET + TSH) x ISH - TSET x IIB

(9)

(10)

R2 =

TSET x TC x R1

Vref - R1 x ISH - TSET x TC

Example:

R1 and R2 when set temperature is -25 °C (TSET = 248 °K)

and temperature hysteresis (TSH) is 5 °C.

1.6 x 5

R1 = (248 + 5) x 1.25 µ - 248 x 0.1 µ

R1 = 27.45 k = 27 kΩ

R2 =

248 x 4 m x 27.45 k

1.6 - 27.45 k x 1.25 µ - 248 x 4 m

R

2

=

47.47

k

=

47

kΩ

PACKAGE POWER DISSIPATION (PD)

The power dissipation rating of 200 mW represents the

amount of power the device can dissipate without damage

to the IC. Power dissipation should be kept to a minimum

to reduce temperature errors due to self-heating.

TK11051

January 1999 TOKO, Inc.

Page 7

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