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TK11050 Datasheet Preview

TK11050 Datasheet

TEMPERATURE CONTROLLER IC

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TK11050 pdf
TK11050
TEMPERATURE CONTROLLER IC
FEATURES
s Internal Temperature Sensor, Voltage Reference
and Comparator
s Temperature Threshold and Hysteresis Set by Only
Two External Resistors
s Output Logic: Low to High with Increasing Temp.
s Active High On/Off Control
s 2.7 to 6.0 V Supply Range
s Miniature Package (SOT-23L-6)
s Minimum External Parts Count
s Low Power Consumption
s Very Wide Temperature Range
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
DESCRIPTION
The TK11050 is an accurate temperature controller IC for
use over the -30 to +105 °C temperature range. The
TK11050 monolithic bipolar integrated circuit contains a
temperature sensor, stable voltage reference and a
comparator, making the device very useful as an on/off
temperature controller. Two external resistors easily set
the sensing temperature threshold and hysteresis. Its wide
operating voltage range of 2.7 to 6.0 V makes this IC
suitable for a number of applications requiring accurate
temperature control. The device is in the “on” state when
the control pin is pulled to a logic high level.
The TK11050 is available in a miniature SOT-23L-6 surface
mount package.
TK11050
VCC
01S VCONT
VREF
COMP OUT
GND
COMP IN
BLOCK DIAGRAM
ORDERING INFORMATION
TK11050MTL
Tape/Reel Code
VCONT
VREF
TAPE/REEL CODE
TL: Tape Left
COMP IN
ON/OFF
CIRCUIT
VOLTAGE
REFERENCE
VPTAT
TEMPERATURE
SENSOR
-
+
VCC
COMP OUT
GND
January 1999 TOKO, Inc.
Page 1



TOKO
TOKO

TK11050 Datasheet Preview

TK11050 Datasheet

TEMPERATURE CONTROLLER IC

No Preview Available !

TK11050 pdf
TK11050
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 10 V
Power Dissipation (Note 1) ................................ 200 mW
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range .................-30 to +105 °C
Operating Voltage Range ................................. 2.7 to 6 V
Junction Temperature .......................................... 150 °C
Lead Soldering Temperature (10 s) ..................... 235 °C
TK11050 ELECTRICAL CHARACTERISTICS
Test conditions: TA = 25 °C, VCC = 3.0 V, VCONT = 2.4 V, IOUT = 40 µA, R3 = 100 k, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
ICC Quiescent Current
Comparator Output LOW
Comparator Output HIGH
250 350 µA
210 350 µA
ISTBY
VPTAT
Standby Current
Temperature Sensor Voltage
(Note 4)
TC Temperature Coefficient
TERR Temperature Error
CLH Comparator Output HIGH
CLL Comparator Output LOW
IIB Input Bias Current
ISH Hysteresis Set Current
IOUT Output Sink Current
Vref TERMINAL CHARACTERISTICS
Vref Reference Voltage
I Reference Output Current
ref
Line Reg Line Regulation
Load Reg Load Regulation
CONTROL TERMINAL SPECIFICATIONS
VCONT 0.6 V
TA = 25 ° C
TA = 85 ° C
TA = -30 ° C
TA = 0 to 85 ° C
TA = 0 to 85 ° C, (Note 2)
(Note 3)
R3 10 k, (Note 3)
Comparator IN > VPTAT
Comparator IN < VPTAT
CLL 0.3 V
TA = 25 ° C
R
1
+
R
2
=
40
k
VCC = 3 to 6 V
IOUT = 0 to 500 µA
1 µA
1.192
V
1.432
V
0.972
V
4.0 mV/° C
-4.0 0 4.0 ° C
2.8 V
0.3 V
0.1 0.3 µA
0.9 1.25 1.6
µA
30 300 µA
1.6 V
40 500 µA
2 8 mV
1 8 mV
ICONT
VCONT(ON)
VCONT(OFF)
Control Current
Control Voltage (ON)
Control Voltage (OFF)
Output ON
Output OFF
1 3.5 6 µA
1.8
GND
VCC V
0.6 V
Note 1: Power dissipation is 200 mW when in Free Air. Derate at 1.6 mW/°C for operation above 25 °C.
Note 2: The resistance values of R1 and R2 can be calculated as follows: R1 = Vref x TSH / (TSET x ISH - (TSET -TSH) x IIB), R2 = TSET x TC x R1 / (Vref -
R1 x IIB - TSET x TC). IIB is 0.1 µA and ISH is 1.25 µA.
Note 3: When VPTAT < COMP IN, COMP OUT < 0.3 V (Low Level). When VPTAT > COMP IN, COMP OUT > 2.8 V (High Level).
Note 4: VPTAT does not have an output pin.
Page 2
January 1999 TOKO, Inc.


Part Number TK11050
Description TEMPERATURE CONTROLLER IC
Maker TOKO
Total Page 8 Pages
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