TK11052 데이터 시트보기 (PDF) - Toko America Inc

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TK11052

THERMOSTAT IC

Toko America Inc  

TK11052

Noise Reduction

APPLICATION HINTS (CONT.)

When the thermostat IC is operated in a noisy environment (e.g., motor, fan, etc.), the noise on the signal lines may exceed

the limits of the comparator hysteresis window. This results in erratic comparator output levels. This can be corrected by

adding 0.1 µF capacitors from Pin 1 to GND (or Pin 4), Pin 2 to GND (or Pin 4), and Pin 4 to GND as shown below. The

configuration is determined by the desired comparator output level during power-up in the hysteresis area as described

earlier.

C = 0.1 µF

b

Rb

C = 0.1 µF

d

Rd

VCC

Ra

Rc

1 µF

Vref

Cref = 0.1 µF

V

CC

ROUT1

VCC OUTPUT1

ROUT2

OUTPUT2

July 1999 TOKO, Inc.

Page 11

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