Datasheet TC624COA, TC622VAT, TC622EPA, TC622EOA, TC622EAT Datasheet (Microchip Technology)
...
TC622/TC624
Low Cost Single Trip Point Temperature Sensor
Features
• TemperatureSet Point Easily Programs with a
Single External Resistor
• Operates with 2.7V Power Supply (TC624)
• TO-220 Package for Direct Mounting to Heatsink
(TC622XAT) or Standard 8-Pin PDIP and SOIC
Applications
• Power Supply Over-TemperatureDetection
• Consumer Electronics
• Fire/ Heat Detection
• UPSs, Amplifiers, Motors
• CPU Thermal Management in PCs
General Description
The TC622 and TC624 are programmable solid-state
temperature sensors designed to replace mechanical
switches in sensing and control applications. Both
devices integrate the temperature sensor with a
voltage reference and all required detector circuitry.
The desired temperature set point is set by the user
with a single external resistor.
Ambient temperature is sensed and compared to the
programmed set point. The OUT and OUT
driven to their active state when t he measured
temperature exceeds the programmed set point.
The TC622 has a power supply voltage range of 4.5V
to18.0VwhiletheTC624operatesovera powersupply
range of 2.7V to 4.5V. Both devices are usable over a
temperature r ange of -40°C to +125°C (TC622VXX,
TC624VXX). Both devices feature low supply current
making them suitable for portable applications.
Eight-pin throu gh-hole and surf ace mount packa ges
are available. The TC622 is also offered in a 5-pin
TO-220 package.
The TC622 and TC624 are single point t emperature
detectors ideal for use in a wide variety of applications.
outputs are
Device Selection Table
Part Number Voltage Operation Package Ambient Temperature
TC622COA 4.5V to 18V 8-Pin SOIC 0°C to +70°C
TC622CPA 4.5V to 18V 8-Pin PDIP 0°C to +70°C
TC622EAT 4.5V to 18V 5-PinTO-220 -40°C to +85°C
TC622EOA 4.5V to 18V 8-PinSOIC -40°C to +85°C
TC622EPA 4.5V to 18V 8-Pin PDIP -40°C to +85°C
TC622VAT 4.5V to 18V 5-PinTO-220 -40°C to +125°C
TC622VOA 4.5V to 1 8V 8-PinSOIC -40°C to +125°C
TC622VPA 4.5V to 18V 8-PinPDIP -40°C to +125°C
TC624COA 2.7V to 4.5V 8-Pin SOIC 0°C to +70°C
TC624CPA 2.7V to 4.5V 8-Pin PDIP 0°C to +70°C
TC624EOA 2.7V to4.5V 8-PinSOIC -40°C to +85°C
TC624EPA 2.7V to4.5V 8-PinPDIP -40°C to +85°C
TC624VOA 2.7V to 4.5V 8-PinSOIC -40°C to +125°C
TC624VPA 2.7V to4.5V 8-PinPDIP -40°C to +125°
2002 Microchip TechnologyInc. DS21440B-page 1
TC622/TC624
Package Type
PDIP
1
NC
2
OUT
OUT
GND
NC
OUT
OUT
GND
Note: For TO-220 Package, Pin 3 is connected to case heatsink.
3
4
1
2
3
4
TC622CPA
TC622EPA
TC622VPA
TC624CPA
TC624EPA
TC624VPA
8
NC
V
DD
7
NC
6
T
5
SET
8
NC
7
V
DD
NC
6
5
T
SET
Functional Block Diagram
NC
OUT
OUT
GND
NC
OUT
OUT
GND
1
2
TC622COA
TC622EOA
3
TC622VOA
4
1
TC624COA
2
TC624EOA
3
TC624VOA
4
SOT-220SOIC
NC
8
V
7
DD
NC
6
T
5
SET
NC
8
V
DD
7
NC
6
T
5
SET
+9V
TC622EAT
TC622VAT
12345
DD
OUT
OUT
GND
V
SET
T
9V
Battery
R
SET
7
1
NC
5
T
SET
V
DD
Microcontrollers
NC
8
Horn
TC622
TC624
6
NC
4
GND
OUT
OUT
3
2
ALARM
DS21440B-page 2
2002 Microchip TechnologyInc.
TC622/TC624
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage (TC622).........................................20V
(TC624)........................................5.5V
Input Voltage Any Input.. (GND – 0.3V) t o (V
DD
+0.3V)
Stresses above those listed under "Absolute Maximum Ratings"maycause permanentdamage to thedevice.These are
stress ratings only and functional operation of the device at
these or any other conditions above those indicated in the
operation sections of the specifications is not implied. Exposure to Absolute Maximum R ating conditions for extended
periodsmay affectdevice reliability
.
Operating Temperature ...................... -40°C to +125°C
C Version .............................. 0°C to +70°C
E Version ...........................-40°C to +85°C
V Version ......................... -40°C to +125°C
Storage Temperature .........................-65°C to +150°C
.
TC622/TC624 EL ECTRI CAL SPECIFICATIONS
Electrical Characteristics: Over operating temperature range, unless otherwise specified.
Symbol Parameter Device Min Typ Max Unit Test Conditions
V
I
DD
SupplyVoltage Range TC622
DD
Supply Current TC622
TC624
TC624
V
V
V
V
T
SET
OutputVoltage(High) TC622 0.90 x V
OH
OutputVoltage(Low) TC622 —
OL
Output Voltage (High) TC624 —
OH
OutputVoltage(Low) TC624 —
OL
AbsoluteAccuracy TC622
TC624
OUT T rip Point Hysteresis TC622
TC624
4.5
2.7
—
—
0.80 x V
—
—
0.90 x V
0.80 x V
—
—
T-5
T-5
—
—
DD
DD
DD
DD
—
—
200
170
—
—
—
—
—
—
—
—
—
—
T±1
T±1
2
2
18
4.5
600
300
—
—
0.15 x V
0.30 x V
0.35 x V
—
—
0.1 x V
0.2 x V
0.25 x V
T+5
T+5
—
—
V
µA5.0V≤ VDD≤ 18V
2.7V ≤ V
DD
≤ 4.5V
V5.0V≤ VDD≤ 18V, -40°C ≤ TA≤ +125°C,
I
=250µA
OH
I
=500µA
OH
V-40°C≤ TA≤ +85°C, IOL=500µA
DD
DD
DD
DD
DD
DD
I
=1mA
OL
V
-40°C ≤ T
2.7V ≤ V
-40°C ≤ T
I
OH
≤ +125°C, IOL=1mA
A
≤ 4.5V
DD
≤ +125°C, IOH=250µA
A
=500µA
V-40°C≤ TA≤ +85°C, IOL=500µA
I
=1mA
OL
°C T
-40°C ≤ T
SET
T
SET
≤ +125°C, IOL=1mA
A
= Programmed Temperature
= Programmed Temperature
°C
2002 Microchip TechnologyInc. DS21440B-page 3
TC622/TC624
2.0 PIN DESCRIPTION
ThedescriptionsofthepinsarelistedinTable2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin No.
(8-Pin SOIC)
(8-Pin PDIP)
1 NC No Internal Connection.
2OUT
3 OUT Active high output.
4 GND Ground Terminal.
5T
6 NC No Internal Connection.
7V
8 NC No Internal Connection.
Symbol Description
Active low output.
SET
DD
Temperatureset point. Connect an external1% resistor from T
point.
Power supply input.
to VCCto set trip
SET
Pin No.
(5-Pin SOT-220)
1OUT
2 OUT Active high output.
3V
4 GND Ground Terminal.
5T
Symbol Description
Active low output.
DD
SET
Power supply input.
Temperatureset point. Connect an external1% resistor from T
point.
to VCCto set trip
SET
DS21440B-page 4
2002 Microchip TechnologyInc.
TC622/TC624
3.0 DETAILED DESCRIPTION
3.1 Trip Point Programming
When the temperature of the device exceeds the programmed temperature trip point, T
OUT
outputs are driven into their active states. The
desired trip point temperature is programmed with a
single external resistor connected between the T
input and VCC. The relationship between the resistor
value and the trip point temperature is given by
Equation 3-1.
EQUATION 3-1:
R
= 0. 5997 x T
TRIP
Where:
R
= Programming resistor value in Ohms
TRIP
T = Desired trip temperature in degrees Kelvin.
For example, as shown in Figure 3-1, to program the
device to trip at 50°C, the programming resistor is:
R
= 0.5997 x ((50 + 273.15)
TRIP
,theOUTand
SET
2.1312
2.1312
) = 133.65kΩ
SET
3.2 Hysteresis
To prevent output “chattering”at the trip point temperature, the temperaturedetectorintheTC622/TC624has
2°C hysteresis(seeFigure 3-2). The outputs are driven
active when the temperature crosses the set point
determined by the external resistor. As t emperature
declines below the set point, the hysteresis action wi ll
hold the outputs true until the temperature dr ops 2°C
below the threshold.
FIGURE 3-2: TC622/TC624
HYSTERESIS
Temperature
Set Point
(Set Point – 2 Degrees C)
OUT
OUT
FIGURE 3-1: PROGRAMMING
RESISTOR VALUES VS.
TEMPERATURE
250
(kΩ)
200
TRIP
150
100
RESISTANCE, R
50
-55 -35 -15 5 25 45 65 85 105 125
TEMPERATURE (˚C)
2002 Microchip TechnologyInc. DS21440B-page 5
TC622/TC624
r
4.0 TYPICAL APPLICATIONS
4.1 Over-Temperature Shutdown
TheTC622canbeusedtocreateasimpleover-temperatureshutdowncircuit. In thiscircuit,temperatureis
sensed within the system enclosure (internal system
ambient) or at the heatsink itself. When measured
temperature exceeds a preset limit, a fault i s indicated
and t he system shuts down.
4.2 Cooling a nd Heating Applications
The TC622/TC624 can be used to control a DC fan as
shown in Figure 4-2. The fan turnson when the sensed
temperaturerises above T
temperature falls below T
Figure 4-3 shows the TC622 acting as a heater
thermostat. Circuit operation is identical to that of the
cooling fan application.
SET
SET
Figure 4-1 illustrates an over-temperature shutdown
circuit using the TC622 sensor in a single TO-220
package, allowing direct attachment to the heatsink
surface.Asshown,theTC622outputsare drivenactive
when the heatsink temperature equals the trip point
temperature set by R
. When t his happens, the
TRIP
crowbar circuit is activated, causing the supply output
to fold back to zero. The TC622 outputs remain active
until the heatsink temperature falls a minimum of 2°C
(built-inhysteresis)below the trip point temperature, at
which time the device again allows normal supply
operation.
FIGURE 4-1: TC622 POWER SUPPLY OVE R-TEMPERATURE SHUTDOWN
Heatsink
and remains on until the
-2°C.
Output
Device
Circuit Board
TC622 Heatsink Mounting
TC622
R
TRIP
V
CC
Output Device
Power Good
Signal
V
OUT
TC622
T
SET
GND
V
DD
OUT
OUT
Heatsink Surface
OVERTEMP
Crowba
Circuit
DS21440B-page 6
2002 Microchip TechnologyInc.
TC622/TC624
FIGURE 4-2: TC624 AS A FAN
CONTROLLER FOR
NOTEBOOK PC
+2.7 to 4.5V +12V
R
SET
7
V
1
5
6
4
GND
T
SET
Temperature
T
– 2 C
SET
NC
T
NC
SET
TC624
DD
NC
OUT
OUT
8
3
2
+
DC Fan
N-Channel
Logic Level
MOSFET
FIGURE 4-3: TC622 AS A HEATER
THERMOSTAT
+12V
N-Channel
Level Logic
MOSFET
R
SET
1
5
6
4
T
SET
Temperature
T
SET
– 2 C
NC
T
SET
NC
GND
TC622
+4.5 to 18.0V
7
V
DD
8
NC
OUT
2
OUT
Heater
OUT
Fan "On"
OUT
Heater "On"
2002 Microchip TechnologyInc. DS21440B-page 7
TC622/TC624
3
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
8-Pi
P
5.0 PACKAGING INFORMATION
5.1 Package Marking Information
Package marking data not available at this time.
5.2 Taping Form
Component Taping Orientation for 8-Pin SOIC (Narrow) Devices
User Direction of Feed
PIN 1
Standard Reel Component Orientation
for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
8-Pin SOIC (N) 12 mm 8 mm 2500 13 in
W
P
5.3 Package Dimensions
n Plastic DI
.045 (1.14
.030 (0.76
.200 (5.08
.140 (3.56
.150 (3.81
.115 (2.92
.110 (2.79
.090 (2.29
.400 (10.16
.348 (8.84
.070 (1.78
.040 (1.02
.022 (0.56
.015 (0.38
.260 (6.60
.240 (6.10
.040 (1.02
.020 (0.51
.310 (7.87
.290 (7.37
.015 (0.38
.008 (0.20
.400 (10.16
.310 (7.87
Dimensions: inches (mm)
DS21440B-page 8
2002 Microchip TechnologyInc.
5.4 Package Dimensions (Continued)
.
8
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
8
C
(
)
-Pin SOI
TC622/TC624
.050 (1.27) TYP
.197 (5.00
.189 (4.80
.020 (0.51
.013 (0.33
5-Pin TO-220
.117 (2.97)
.103
.293 (7.44)
.204 (5.18)
.010 (0.25
.004 (0.10
2.62
.157 (3.99
.150 (3.81
.415 (10.54)
.390 (9.91)
.244 (6.20
.228 (5.79
.069 (1.75
.053 (1.35
.156 (3.96)
.140 (3.56)
DIA.
.050 (1.27
.016 (0.40
.055 (1.40)
.045 (1.14)
.613 (15.57)
.569 (14.45)
.010 (0.25
.007 (0.18
Dimensions: inches (mm)
.185 (4.70)
.165 (4.19)
3° - 7.5°
5 PLCS.
.590 (14.99)
.482 (12.24)
PIN 1
.273 (6.93)
.263 (6.68)
2002 Microchip TechnologyInc. DS21440B-page 9
.037 (0.95)
.025 (0.64)
.072 (1.83)
.062 (1.57)
.025 (0.64)
.012 (0.30)
.115 (2.92)
.087 (2.21)
Dimensions: inches (mm)
TC622/TC624
NOTES:
DS21440B-page 10
2002 Microchip TechnologyInc.
TC622/TC624
SALES AND SUPPORT
Data Sheets
Products supportedby a preliminaryDataSheetmayhavean erratasheet describingminoroperationaldifferences and recommendedworkarounds.To determine if an errata sheetexists for a particular device,please contact one of the following:
1. Your local Microchip sales office
2. The MicrochipCorporate Literature Center U.S. FAX:(480) 792-7277
3. The Microchip Worldwide Site (www.microchip.com)
Pleasespecify which device, revision of silicon and Data Sheet (includeLiterature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn)to receive the most currentinformationon our products.
2002 Microchip TechnologyInc. DS21440B-page 9
TC622/TC624
NOTES:
DS21440B-page 10
2002 Microchip TechnologyInc.
TC622/TC624
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringementof
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with
express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property
rights.
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2002 Microchip TechnologyInc. DS21440B-page 11
8-bit MCUs, KEELOQ®code hopping
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DS21440B-page 12
*DS21440B*
2002 Microchip Technology Inc.
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