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TK11052 Datasheet Preview

TK11052 Datasheet

THERMOSTAT IC

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TK11052 pdf
TK11052
THERMOSTAT IC
FEATURES
s Internal Temperature Sensor, Voltage Reference
and Two Comparators with
s Temperature Threshold and Hysteresis Set by Only
Two External Resistors
s Output Logic:
Low to High with Increasing Temp. by OUTPUT1
High to Low with Increasing Temp. by OUTPUT2
s Very Wide Operating Supply Range
(VCC = 2.7 to 6.0 V)
s Miniature Package (SOT23L-8)
s Minimum External Parts Count
s Low Power Consumption
s Very Wide Temperature Range
DESCRIPTION
The TK11052 is an accurate temperature controller IC for
use over the -30 to +105 °C temperature range. The
TK11052 monolithic bipolar integrated circuit contains a
temperature sensor, stable voltage reference and two
comparators, making the device very useful as an on/off
thermostat. Two external resistors easily set the sensing
temperature threshold and hysteresis of each thermostat.
Its wide operating voltage range of 2.7 to 6.0 V makes this
IC suitable for a number of applications requiring an
accurate thermostat.
APPLICATIONS
s Home and Industrial Thermostats
s Home Appliance Temperature Control
s Notebook Computer Temperature Monitor
s Pentium Processor Temperature Monitor
s Power Supply Overtemperature Protection
s Copy Machine Overtemperature Protection
s System Overtemperature Protection
TK11052
INPUT1
INPUT2
01S
VCC
VREF
OUTPUT1
OUTPUT2
GND
NC
The TK11052 is available in a miniature SOT23L-8 surface
mount package.
BLOCK DIAGRAM
ORDERING INFORMATION
TK11052MTL
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
IIB1
ISH1
IIB2
ISH2
- COMP1
+
+ COMP2
-
TEMPERATURE
SENSOR
TC = 6.1 mV/ °C
IOUT
Vref = 1.597 V
REFERENCE
VOLTAGE
ISINK1
ISINK2
July 1999 TOKO, Inc.
Page 1



TOKO
TOKO

TK11052 Datasheet Preview

TK11052 Datasheet

THERMOSTAT IC

No Preview Available !

TK11052 pdf
TK11052
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 10 V
Power Dissipation .............................................. 200 mW
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range .................-30 to +105 °C
Operating Voltage Range .............................. 2.7 to 6.0 V
Junction Temperature .......................................... 150 °C
Lead Soldering Temperature (10 s) ..................... 235 °C
TK11052 ELECTRICAL CHARACTERISTICS
Test conditions: TA = 25 °C, VCC = 3.0 V, IOUT = 80 µA, ROUT1 = 300 k, ROUT2 = 300 kΩ, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
ICC Supply Current
OUT1: CLH, OUT2: CLL
280 350
µA
Vref Reference Voltage
(Pin 4)
1.597
V
IOUT Output Current (Vref)
Load Reg < 12 mV (Pin 4)
80 500 µA
Line Reg Line Regulation (Vref)
VCC = 3 V to 6 V (Pin 4)
-9 0 +9 mV
Load Reg Load Regulation (Vref)
IOUT = 0 µA to 500 µA (Pin 4)
3 12 mV
TA = 25 ° C
645 mV
VTEMP
Temperature Sensor (internal) TA = 85 ° C
1011
mV
TA = 0 ° C
492.5
mV
TC
Temperature Coefficient
(internal)
TA = 0 ° C to 85 ° C
6.1 mV/° C
TERR
CLH
CLL
IIB1
ISH1
IIB2
ISH2
ISINK
Total Temperature Error
TA = 0 ° C to 85 ° C (Note 1)
Comparator Output High Level (Note 2)
Comparator Output Low Level
Input Bias Current 1
Hysteresis Set Current 1
Input Bias Current 2
Hysteresis Set Current 2
Output Sink Current
ISINK 500 µA (Note 2)
OUT1: CLH
OUT1: CLL
OUT2: CLL
OUT2: CLH
CLL 0.3 V, (Pin 7, Pin 8)
-4.0
2.8
-50
0.9
-50
0.9
0
0
1.35
0
1.35
10
4.0
0.3
50
1.8
50
1.8
500
°C
V
V
nA
µA
µA
µA
µA
Note 1: This spec. is an error between a temp. to which the comparator reverses and a set temp. The resistance values of Ra, Rb, Rc, Rd can be
calculated as follows:
Ra or Rc =
VREF x TSM x TC
(0.4925 + TSET x TC) x ISH
Rb or Rd =
VREF x TSH x TC
(VREF - 0.4925 - TSET x TC) x ISH
Note 2: When VTEMP < INPUT1, OUTPUT1 > 2.8 V (CLH). When VTEMP > INPUT1, OUTPUT1 < 0.3 V (CLL).
When VTEMP < INPUT2, OUTPUT2 < 0.3 V (CLL). When VTEMP > INPUT2, OUTPUT2 > 2.8 V (CLH).
Page 2
July 1999 TOKO, Inc.


Part Number TK11052
Description THERMOSTAT IC
Maker TOKO
Total Page 12 Pages
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