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PDF TC620 Data sheet ( Hoja de datos )
| Número de pieza | TC620 | |
| Descripción | (TC620 / TC621) DUAL TRIP POINT TEMPERATURE SENSORS | |
| Fabricantes | TelCom Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TC620 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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1
TC620
TC621
5V, DUAL TRIP POINT TEMPERATURE SENSORS
FEATURES
s User-Programmable Hysteresis and Temperature
Set Point
s Easily Programs with 2 External Resistors
s Wide Temperature Detection
Range ................ – 40°C to +125°C (TC620/621CVx)
s External Thermistor for Remote Sensing
Applications (TC621x)
APPLICATIONS
s Power Supply Overtemperature Detection
s Consumer Equipment
s Temperature Regulators
s CPU Thermal Protection
ORDERING INFORMATION
Part No.
TC620x*COA
TC620x*CPA
TC620x*EOA
TC620x*EPA
TC620CVOA
TC621x*COA
TC621x*CPA
Package
Ambient
Temperature
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
8-Pin SOIC
– 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
8-Pin SOIC
– 40°C to +125°C
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
GENERAL DESCRIPTION
The TC620 and TC621 are programmable logic output
temperature detectors designed for use in thermal manage-
ment applications. The TC620 features an on-board tem-
perature sensor, while the TC621 connects to an external
NTC thermistor for remote sensing applications.
Both devices feature dual thermal interrupt outputs
(HIGH LIMIT and LOW LIMIT), each of which program with
a single external resistor. On the TC620, these outputs are
driven active (high) when measured temperature equals the
user-programmed limits. The CONTROL (hysteresis) out-
put is driven high when temperature equals the high limit
setting, and returns low when temperature falls below the
low limit setting. This output can be used to provide simple
ON/OFF control to a cooling fan or heater. The TC621
provides the same output functions except that the logical
states are inverted.
The TC620/621 are usable over a maximum tempera-
ture range of – 40°C to +125°C.
Part No.
Package
Ambient
Temperature
TC621x*EOA
TC621x*EPA
8-Pin SOIC
– 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
*The part code will be C or H (see Functional Block Diagram, below,
and page 2).
2
3
4
5
FUNCTIONAL BLOCK DIAGRAM
Temp
to
Voltage
Converter
2
LOW SET
VREF
GEN
TC620
+
–
VDD
8
4
7
LOW LIMIT
1
THERMISTOR
Thermistor
Interface
Circuit
2
HIGH SET
VREF
GEN
3
HIGH SET
VREF
VREF
GEN
+6
HIGH LIMIT
–
RS
QQ
5
CONTROL*
3
LOW SET
VREF
VREF
GEN
*Suffix code "C" denotes cooling option (high true CONTROL output);
suffix code "H" denotes heating option (low true CONTROL output).
TELCOM SEMICONDUCTOR, INC.
TC621
VDD
8
4
6
+
7
HIGH LIMIT
–
7
+6
LOW LIMIT
–
RS
QQ
5
CONTROL*
8
TC620/1-9 11/4/96
2-15
1 page  
5V, DUAL TRIP POINT
TEMPERATURE SENSORS
1
TC620
TC621
+12V
0.1 µF
10 µF
LOW TEMP
30°C
HIGH TEMP
50°C
2
3
1
5
8
TC620
1N4148
6
1N4148
7
TEMPERATURE SCALE
0°C – 30°C (FAN OFF)
30°C – 50°C (FAN LOW)
50°C – UP (FAN HIGH)
4
1 µF
2
1
3
5
8
10k
14
TC4469
7
13
4
6
9
10
11
12
1M
100k
50 pF
VMOTOR
50 Ω
FAN MOTOR
MOSFET
HIGHER POWER OPTION
FAN MOTOR
+12V
Figure 5.
+12V
1
LOW TEMP 2
3
HIGH TEMP 4
TC620
8
7
6
5
FAN MOTOR
MTP3055E
THERMISTOR
(NTC)
1
HIGH TEMP 2
3
LOW TEMP 4
TC621
8
7
6
5
FAN MOTOR
MTP3055E
2
3
4
5
Figure 6.
4.5V TO 18V
HIGH
TEMP
LOW
TEMP
1
2
3
4
TC620
8
7
6
5
1 14
2 13
3 12
4 11
TC4469
5 10
69
78
1k
1k
HIGH
TEMP
WARNING
LOW
TEMP
WARNING
HEATING/COOLING
EQUIPMENT
Figure 7. TC620 Heating/Cooling Application
TELCOM SEMICONDUCTOR, INC.
6
7
8
2-19
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet TC620.PDF ] | |
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