TC620_13 [MICROCHIP]
5V, Dual Trip Point Temperature Sensors; 5V ,双跳变点温度传感器型号: | TC620_13 |
厂家: | MICROCHIP |
描述: | 5V, Dual Trip Point Temperature Sensors |
文件: | 总16页 (文件大小:195K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TC620/TC621
5V, Dual Trip Point Temperature Sensors
Features:
Package Type
8-PDIP
• User Programmable Hysteresis and
Temperature Set Point
NC
V
1
2
3
4
8
DD
• Easily Programs with 2 External Resistors
• Wide Temperature Detection Range:
HIGH LIMIT
LOW SET
HIGH SET
GND
7
6
5
TC620XCPA
TC620XEPA
LOW LIMIT
CONTROL
-0°C to 70°C: (TC620/TC621CCX)
-40°C to +125°C: (TC620/TC621CVX)
-40°C to +85°C: (TC620/TC621CEX)
-55°C to +125°C: (TC620/TC621CMX)
8-PDIP
THERMISTOR
V
1
8
DD
HIGH LIMIT
2
3
4
HIGH SET
LOW SET
GND
7
6
5
TC621XCPA
TC621XEPA
• Onboard Temperature Sensing Applications
(TC620X)
LOW LIMIT
CONTROL
• External NTC Thermistor for Remote Sensing
Applications (TC621X)
8-SOIC
• Available in 8-Pin PDIP and SOIC Packages
V
NC
LOW SET
HIGH SET
GND
1
2
3
4
8
7
6
5
DD
LOW LIMIT
HIGH LIMIT
TC620XCOA
TC620XEOA
TC620CVOA
Applications:
CONTROL
• Power Supply Over Temperature Detection
• Consumer Equipment
8-SOIC
• Temperature Regulators
THERMISTOR
V
1
2
3
4
8
DD
HIGH LIMIT
• CPU Thermal Protection
HIGH SET
LOW SET
GND
7
6
5
TC621XCOA
TC621XEOA
LOW LIMIT
CONTROL
Device Selection Table
Temperature
Range
Part Number
Package
General Description:
TC620X*COA
TC620X*CPA
TC620X*EOA
TC620X*EPA
TC620C*VOA
TC621X*COA
TC621X*CPA
TC621X*EOA
TC621X*EPA
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
0°C to +70°C
0°C to +70°C
The TC620 and TC621 are programmable logic output
temperature detectors designed for use in thermal
management applications. The TC620 features an
onboard temperature sensor, while the TC621
connects to an external NTC thermistor for remote
sensing applications.
-40°C to +85°C
-40°C to +85°C
-40°C to +125°C
0°C to +70°C
Both devices feature dual thermal interrupt outputs
(HIGH LIMIT and LOW LIMIT), each of which is pro-
grammed 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) output is driven high when tem-
perature equals the high limit setting and returns low
when temperature falls below the low limit setting. This
output can be used to provide ON/OFF control to a
cooling fan or heater. The TC621 provides the same
output functions except that the logical states are
inverted.
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
Note:
*The part code will be C or H (see
Functional Block Diagrams).
The TC620/TC621 are usable over operating
temperature ranges of 0°C to 70°C, -40°C to +125°C
and -55°C to 125°C.
2001-2012 Microchip Technology Inc.
DS21439D-page 1
TC620/TC621
Functional Block Diagrams
V
DD
8
4
Temp. to
Voltage
Converter
TC620
+
–
7
LOW LIMIT
2
V
REF
GEN
LOW SET
V
REF
+
–
6
HIGH LIMIT
3
V
REF
GEN
HIGH SET
R
Q
S
Q
5
CONTROL*
V
DD
8
Thermistor
Interface
Circuit
1
THERMISTOR
4
7
TC621
+
HIGH LIMIT
2
V
REF
GEN
HIGH SET
–
V
REF
+
–
6
LOW LIMIT
3
V
REF
GEN
LOW SET
R
Q
S
Q
5
CONTROL*
*Suffix code "C" denotes cooling option (High true CONTROL output).
Suffix code "H" denotes heating option (Low true CONTROL output).
DS21439D-page 2
2001-2012 Microchip Technology Inc.
TC620/TC621
*Stresses above those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the
device. 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 Rating conditions for extended periods may
affect device reliability.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage .......................................................20V
Input Voltage Any Input.. (GND – 0.3V) to (VDD +0.3V)
Package Power Dissipation (TA 70°C)
PDIP .............................................730 mW
SOIC.............................................470 mW
Derating Factors:
Plastic ..........................................8 mW/°C
Operating Temperature:
M Version.........................-55°C to +125°C
V Version .........................-40°C to +125°C
E Version ...........................-40°C to +85°C
C Version .............................. 0°C to +70°C
Storage Temperature .........................-65°C to +150°C
TC620/TC621 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = 25°C, unless otherwise specified.
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VDD
IDD
Supply Voltage Range
Supply Current
4.5
—
—
270
400
—
18
400
1000
1
V
A
W
5V VDD 18V
Output High or Low, 5V VDD 18V
ROUT
IOUT
IOUT
TERR
Output Resistance
Output Current
—
—
mA
mA
°C
Temp. Sensed
Cool/Heat
Source/Sink
Source/Sink
Output Current
—
—
1
Absolute Accuracy
T - 3
T
T + 3
T = Programmed Temperature
2001-2012 Microchip Technology Inc.
DS21439D-page 3
TC620/TC621
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Symbol
Pin No.
(8-Pin PDIP)
(8-Pin SOIC)
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
Description
1
2
NC
No Internal Connection.
LOW SET Low temperature set point. Connect an external 1% resistor from LOW SET to VDD
to set trip point.
3
HIGH SET High temperature set point. Connect an external 1% resistor from HIGH SET to
VDD to set trip point.
4
5
6
7
8
GND
Ground Terminal.
CONTROL Control output.
HIGH LIMIT High temperature push/pull output.
LOW LIMIT Low temperature push/pull output.
VDD
Power supply input.
Pin No.
(8-Pin PDIP)
(8-Pin SOIC)
0°C to +70°C
-40°C to +85°C
Symbol
Description
1
2
THERMISTOR Thermistor input.
HIGH SET
High temperature set point. Connect an external 1% resistor from HIGH SET to
VDD to set trip point.
3
LOW SET
Low temperature set point. Connect an external 1% resistor from LOW SET to
VDD to set trip point.
4
5
6
7
8
GND
Ground Terminal.
CONTROL
LOW LIMIT
HIGH LIMIT
VDD
Control output.
Low temperature push/pull output.
High temperature push/pull output.
Power supply input.
DS21439D-page 4
2001-2012 Microchip Technology Inc.
TC620/TC621
Care must also be taken to ensure the LOW SET
temperature setting is at least 5°C lower than the HIGH
SET temperature setting.
3.0
DETAILED DESCRIPTION
The TC620 has a positive temperature coefficient tem-
perature sensor and a dual threshold detector. Temper-
ature set point programming is accomplished with
external resistors from the HIGH SET and LOW SET
inputs to VDD. The HIGH LIMIT and LOW LIMIT outputs
remain low as long as measured temperature is below
set point values. As measured temperature increases,
the LOW LIMIT output is driven high when temperature
equals the LOW SET set point (±3°C max). If tempera-
ture continues to climb, the HIGH LIMIT output is driven
high when temperature equals the HIGH SET set point
(Figure 3-1). The CONTROL (hysteresis) output is
latched in its active state at the temperature specified
by the HIGH SET resistor. CONTROL is maintained
active until temperature falls to the value specified by
the LOW SET resistor.
Figure 3-2 can help the user obtain an estimate of the
external resistor values required for the desired LOW
SET and HIGH SET trip points.
250
200
150
100
50
-55
-35
-15
5
25
45
65
85
105
125
TEMPERATURE (°C)
High Set Point
FIGURE 3-2:
Trip Temperature
TC620 Sense Resistors vs.
Temperature
Low Set Point
Low Limit Output
High Limit Output
3.2
Built-in Hysteresis
To prevent output “chattering” when measured
temperature is at (or near) the programmed trip point
values, the LOW SET and HIGH SET inputs each have
built-in hysteresis of -2°C below the programmed
settings (Figure 3-3).
Control Output (Cool Option
Control Output (Heat Option)
FIGURE 3-1:
Output Logic
TC620/TC621 Input vs.
3.1
Programming the TC620
The resistor values to achieve the desired trip point
temperatures on HIGH SET and LOW SET are
calculated using Equation 3-1:
Set Point
(Set Point 2°C)
EQUATION 3-1:
High Limit
or Low Limit
Output
RTRIP = 0.5997 x T 2.1312
Where:
RTRIP = Programming resistor in Ohms
T = The desired trip point temperature in degrees
Kelvin.
FIGURE 3-3:
Limit and High Limit Outputs
Built-In Hysteresis on Low
As shown, the outputs remain in their active state
(hysteresis) until temperature falls an additional 2°C
below the user’s setting.
For example, a 50°C setting on either the HIGH SET
or LOW SET input is calculated using Equation 3-2 as
follows:
EQUATION 3-2:
RSET = 0.5997 x ((50 + 273.15)2.1312) = 133.6 k
Care must be taken to ensure the LOW SET program-
ming resistor is a smaller value than the HIGH SET
programming resistor. Failure to do this will result in
erroneous operation of the CONTROL output.
2001-2012 Microchip Technology Inc.
DS21439D-page 5
TC620/TC621
3.3
Using the TC621
350
300
250
200
The TC621 operation is similar to that of the TC620, but
requires an external NTC thermistor. Use the resis-
tance versus temperature curve of the thermistor to
determine the values of the programming resistors.
Note that the pin numbers for the HIGH SET and LOW
SET programming resistors for the TC621 are reversed
versus that of the TC620 (i.e., the resistor value on
HIGH SET [Pin 2] should always be lower than the one
connected to LOW SET [Pin 3]). Also note that the
outputs of the TC621 are LOW TRUE when used with
an NTC thermistor.
150
100
50
0
0
10
20
30
40
50
70
60
3.4
TC621 Thermistor Selection
TEMPERATURE (°C)
The TC621 uses an external thermistor to monitor the
controlling temperature. A thermistor with a resistance
value of approximately 100 k at 25°C is
recommended.
FIGURE 3-4:
Typical NTC Thermistor
3.5 TC620/TC621 Outputs
Both devices have complimentary output stages. They
are rated at a source or sink current of 1 mA maximum.
A temperature set point is selected by picking a resis-
tor whose value is equal to the resistance of the therm-
istor at the desired temperature. For example, using
the data shown in Figure 3-4, a 30 k resistor between
HIGH TEMP (Pin 2) and VDD (Pin 8) sets the high
temperature trip point at +51°C and a 49 k resistor on
LOW TEMP (Pin 3) sets the low temperature trip point
to +41°C.
DS21439D-page 6
2001-2012 Microchip Technology Inc.
TC620/TC621
4.2
Temperature Controlled Fan
4.0
4.1
TYPICAL APPLICATIONS
In the application in Figure 4-2, a high and a low tem-
perature is selected by two RL and RH. The TC620
monitors the ambient temperature and turns the FET
switch on when the temperature exceeds the HIGH
TEMP set point. The fan remains on until the tempera-
ture decreases to the LOW TEMP set point. This
provides the hysteresis. In this application, the fan
turns on only when required.
Dual Speed Temperature Control
In Figure 4-1, the Dual Speed Temperature Control
uses a TC620 and a TC4469 quad driver. Two of the
drivers of the TC4469 are configured in a simple oscil-
lator. When the temperature is below the LOW TEMP
set point, the output of the driver is OFF. When the tem-
perature exceeds the LOW TEMP set point, the
TC4469 gates the oscillator signal to the outputs of the
driver. This square wave signal modulates the remain-
ing outputs and drives the motor at a low speed. If this
speed cannot keep the temperature below the HIGH
TEMP set point, then the driver turns on continuously
which increases the fan speed to high. The TC620 will
monitor the temperature and only allow the fan to oper-
ate when needed and at the required speed to maintain
the desired temperature. A higher power option can be
designed by adding a resistor and a power MOSFET.
The TC621 uses an external thermistor to monitor the
ambient temperature. This adds one part, but allows
more flexibility with the location of the temperature
sensor.
+12V
V
MOTOR
0.1 µF
10 µF
1M
Fan Motor
8
Low Temp.
˚
30 C
14
1N4148
1N4148
100k
13
High
Limit
2
3
1
5
6
7
2
1
3
5
8
MOSFET
50Ω
4
TC620
50 pF
6
High Temp.
˚
50 C
TC4469
9
Low
Limit
Higher Power Option
Fan Motor
10
11
12
4
Temperature Scale
˚
˚
˚
˚
0 C – 30 C (Fan Off)
7
1 µF
10k
˚
30 C – 50 C (Fan Low)
50 C – UP (Fan High)
FIGURE 4-1:
Dual Speed Temperature Control
+12V
+12V
Thermistor
(NTC)
Fan Motor
8
Fan Motor
MTP3055E
Low Temp.
R
1
2
3
4
High
Temp.
1
2
3
4
8
7
6
5
L
7
TC620
TC621
R
H
6
MTP3055E
Low Temp.
R
R
L
H
High Temp.
5
FIGURE 4-2:
Temperature Controlled Fan
2001-2012 Microchip Technology Inc.
DS21439D-page 7
TC620/TC621
4.5V to 18V
High
Temp.
Low
Temp.
1
2
3
4
8
7
1
2
3
4
5
6
7
14
13
12
11
10
9
1k
1k
High
Temp.
Warning
TC620
6
5
TC4469
Low
Temp.
Warning
8
Heating/Cooling
Equipment
FIGURE 4-3:
Heating and Cooling Application
DS21439D-page 8
2001-2012 Microchip Technology Inc.
TC620/TC621
5.0
5.1
PACKAGING INFORMATION
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
W
P
Standard Reel Component Orientation
for 713 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
2001-2012 Microchip Technology Inc.
DS21439D-page 9
TC620/TC621
5.3
Package Dimensions
Note: For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
8-Pin Plastic DIP
Pin 1
.260 (6.60)
.240 (6.10)
.045 (1.14)
.030 (0.76)
.070 (1.78)
.040 (1.02)
.310 (7.87)
.290 (7.37)
.400 (10.16)
.348 (8.84)
.200 (5.08)
.140 (3.56)
.040 (1.02)
.020 (0.51)
.015 (0.38)
.008 (0.20)
3° Min.
.150 (3.81)
.115 (2.92)
.400 (10.16)
.310 (7.87)
.110 (2.79)
.090 (2.29)
.022 (0.56)
.015 (0.38)
Dimensions: inches (mm)
Package Dimensions (Continued)
Note: For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
8-Pin SOIC
Pin 1
.157 (3.99)
.150 (3.81)
.244 (6.20)
.228 (5.79)
.050 (1.27) Typ.
.197 (5.00)
.189 (4.80)
.069 (1.75)
.053 (1.35)
.010 (0.25)
.007 (0.18)
8° Max.
.020 (0.51)
.013 (0.33)
.010 (0.25)
.004 (0.10)
.050 (1.27)
.016 (0.40)
Dimensions: inches (mm)
DS21439D-page 10
2001-2012 Microchip Technology Inc.
TC620/TC621
6.0
REVISION HISTORY
Revision D (December 2012)
Added a note to each package outline drawing.
2001-2012 Microchip Technology Inc.
DS21439D-page 11
TC620/TC621
NOTES:
DS21439D-page 12
2001-2012 Microchip Technology Inc.
TC620/TC621
SALES AND SUPPORT
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2001-2012 Microchip Technology Inc.
DS21439D-page 13
TC620/TC621
NOTES:
DS21439D-page 14
2001-2012 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
32
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. & KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2001-2012, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 9781620768235
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CERTIFIED BY DNV
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devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
== ISO/TS 16949 ==
2001-2012 Microchip Technology Inc.
DS21439D-page 15
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82-2-558-5934
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
Los Angeles
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Toronto
Mississauga, Ontario,
Canada
China - Xiamen
Tel: 905-673-0699
Fax: 905-673-6509
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
11/29/12
DS21439D-page 16
2001-2012 Microchip Technology Inc.
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