TOKO TK11052MTL Datasheet
TK11052
THERMOSTAT IC
FEATURES
■ Internal Temperature Sensor, Voltage Reference
and Two Comparators with
■ Temperature Threshold and Hysteresis Set by Only
Two External Resistors
■ Output Logic:
Low to High with Increasing Temp. by OUTPUT1
High to Low with Increasing Temp. by OUTPUT2
■ Very Wide Operating Supply Range
(V
= 2.7 to 6.0 V)
CC
■ Miniature Package (SOT23L-8)
■ Minimum External Parts Count
■ Low Power Consumption
■ 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
■ Home and Industrial Thermostats
■ Home Appliance Temperature Control
■ Notebook Computer Temperature Monitor
■ Pentium Processor Temperature Monitor
■ Power Supply Overtemperature Protection
■ Copy Machine Overtemperature Protection
■ System Overtemperature Protection
TK11052
INPUT1
INPUT2
01S
V
CC
V
REF
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
V
ref
I
IB1
I
SH1
I
IB2
I
SH2
I
OUT
= 1.597 V
COMP1
+
COMP2
+
-
TEMPERATURE
SENSOR
TC = 6.1 mV/ °C
REFERENCE
VOLTAGE
I
SINK1
I
SINK2
July 1999 TOKO, Inc. Page 1
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
TK11052 ELECTRICAL CHARACTERISTICS
Test conditions: TA = 25 °C, V
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
= 3.0 V, I
CC
= 80 µA, R
OUT
Operating Voltage Range.............................. 2.7 to 6.0 V
Junction Temperature .......................................... 150 °C
Lead Soldering Temperature (10 s) ..................... 235 °C
= 300 kΩ, R
OUT1
= 300 kΩ, unless otherwise specified.
OUT2
I
CC
V
fer
I
TUO
geReniLV(noitalugeReniL
geRdaoLV(noitalugeRdaoL
V
PMET
T
C
T
RRE
C
HL
C
LL
I
1BI
I
1HS
I
2BI
I
2HS
I
KNIS
tnerruCylppuSC:1TUO
egatloVecnerefeR)4niP(795.1V
V(tnerruCtuptuO
))4niP(Vm21<geRdaoL08005Aµ
fer
)V
fer
)I
fer
)lanretni(
1tnerruCsaiBtupnIC:1TUO
2tnerruCsaiBtupnIC:2TUO
tnerruCkniStuptuOC
HL
CC
TUO
T
A
)lanretni(rosneSerutarepmeT
T
A
T
A
tneiciffeoCerutarepmeT
rorrEerutarepmeTlatoTT
T
A
A
C°52=546Vm
C°58=1101Vm
C°0=5.294Vm
C:2TUO,
LL
)4niP(V6otV3=9-09+Vm
)4niP(Aµ005otAµ0=321Vm
C°58otC°0=1.6C°/Vm
)1etoN(C°58otC°0=0.4-00.4C°
leveLhgiHtuptuOrotarapmoC)2etoN(8.2V
leveLwoLtuptuOrotarapmoCI
1tnerruCteSsiseretsyHC:1TUO
2tnerruCteSsiseretsyHC:2TUO
≤ )2etoN(Aµ0053.0V
KNIS
HL
LL
LL
HL
≤ )8niP,7niP(,V3.001005Aµ
LL
082053Aµ
05-005An
9.053.18.1Aµ
05-005Aµ
9.053.18.1Aµ
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:
V
x TSM x T
Note 2: When V
When V
Ra or Rc =
Rb or Rd =
< INPUT1, OUTPUT1 > 2.8 V (CLH). When V
TEMP
< INPUT2, OUTPUT2 < 0.3 V (CLL). When V
TEMP
(V
REF
(0.4925 + T
V
x TSH x T
REF
- 0.4925 - T
REF
x TC) x I
SET
SET
C
SH
C
x TC) x I
SH
> INPUT1, OUTPUT1 < 0.3 V (CLL).
TEMP
> INPUT2, OUTPUT2 > 2.8 V (CLH).
TEMP
Page 2 July 1999 TOKO, Inc.
TK11052
P
P
TEST CIRCUIT
Cb = 0.1 µF
R
b
Cd = 0.1 µF
R
d
V
CC
Note: For information on Cb and Cd, see Applications Hints Section.
R
R
1 µF
V
a
c
ref
C
= 0.1 µF
ref
V
CC
R
OUT1
V
OUT
CC
R
OUT2
OUT
July 1999 TOKO, Inc. Page 3
TK11052
V
(V)
V
(V)
T
( C)
I
(
A)
I
(
A)
I
(
A)
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, VCC = 3 V, I
= 80 µA, unless otherwise specified.
OUT
REFERENCE VOLTAGE vs.
TEMPERATURE
1.64
1.62
1.60
ref
1.58
1.56
1.54
-25 0 25 50 75 100
TA (°C)
TOTAL TEMPERATURE ERROR vs.
2
1
0
-1
ERR
-2
TEMPERATURE
1.2
0.8
0.6
TEMP
0.4
0.2
300
290
280
µ
270
CC
260
TEMPERATURE SENSOR vs.
TEMPERATURE
1.0
-25 0 25 50 75 100
TA (°C)
SUPPLY CURRENT vs.
TEMPERATURE
OUTPUT1 = "H"
OUTPUT2 = "L"
µ
SH
-3
-25 0 25 50 75 100
TA (°C)
HYSTERESIS SET CURRENT vs.
TEMPERATURE
2.5
2.0
1.5
1.0
0.5
0
-25 0 25 50 75 100
TA (°C)
n
250
-25 0 25 50 75 100
TA (°C)
INPUT BIAS CURRENT vs.
TEMPERATURE
5
4
3
IB
2
1
0
-25 0 25 50 75 100
TA (°C)
Page 4 July 1999 TOKO, Inc.
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