TC626040VZB [TELCOM]
TEMPERATURE LIMIT SWITCH; 温度限位开关
| 型号： | TC626040VZB |
| 厂家： | 
TELCOM SEMICONDUCTOR, INC |
| 描述： | TEMPERATURE LIMIT SWITCH |
| 文件： | 总2页 (文件大小：35K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
2
TC626*
* PATENTED
TEMPERATURE LIMIT SWITCH
FEATURES
GENERAL DESCRIPTION
■ Requires No External Components
■ On-Chip Temperature Sensing
■ TO-220 package for "Hot Spot" Mounting
■ 50mA Output Signal TO-220 Package (TC626VAB)
■ TO-92 Package for Direct Circuit Board Mounting
The TC626 is a temperature limit detector that notifies
the system when measured temperature is above the fac-
tory-programmedsetting. Itisdesignedtoreplacemechani-
cal(bimetal)temperaturelimitswitchesandoffersincreased
ruggedness,higherreliabilityandgreatersetpointaccuracy.
It requires no external components.
The TC626 operates over a – 55°C to +125°C tempera-
ture range. It is available in a TO-92 package, which is ideal
for ambient temperature sensing applications. It is also
available in a TO-220-3 package for heatsink temperature
measurement applications.
APPLICATIONS
■ Vibration-Immune Temperature Sensing
■ Fan Speed Control Circuits
■ System Overtemperature Shutdown
■ Advanced Thermal Warning
■ Consumer Products
SYSTEM OVERTEMPERATURE PROTECTION
ORDERING INFORMATION
Temperature
5V TO 18V
PIN 1 SWITCHES 'HIGH' IF
TEMPERATURE GOES ABOVE
THE PRESET VALUE.
Part Number*
Package
Range
TC626040VAB
TC626040VZB
TC626050VAB
TC626050VZB
TC626080VAB
TC626080VZB
TC626090VAB
TC626090VZB
TC626100VAB
TC626100VZB
TO-220-3
TO-92-3
TO-220-3
TO-92-3
TO-220-3
TO-92-3
TO-220-3
TO-92-3
TO-220-3
TO-92-3
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
– 55°C to +125°C
2
NC
SYSTEM POWER
RELAY
1
TC626
3
NC = NORMALLY CLOSED
*Trip-point temperature is designated as follows: Part numbers are
TC626xxxVAB or TC626VZB, where xxx = trip-point tempeature in °C.
For high volume applications requiring different trip-points, contact
factory.
PIN CONFIGURATIONS
TO-220-3
TO-92-3
1 2 3
TC626xxxVAB
TC626xxxVZB
1
2 3
1 2 3
TC626-6 8/23/96
TELCOM SEMICONDUCTOR, INC.
2-29
TEMPERATURE LIMIT SWITCH
TC626
*Stresses above those listed under "Absolute Maximum 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
thoseindicatedintheoperationsectionsofthespecificationsisnotimplied.
Exposuretoabsolutemaximumratingconditionsforextendedperiodsmay
affect device reliability.
ABSOLUTE MAXIMUM RATINGS*
Package Power Dissipation (TA ≤ 70°C)
TO-92 ...........................................................440mW
TO-220 ............................................................1.6mW
Supply Voltage ............................................................20V
Input Voltage Any Input...... (GND – 0.3V) to (VDD + 0.3V)
Operating Temperature ......................... – 55°C to +125°C
Maximum Junction Temperature........................... +150°C
Storage Temperature ............................ – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
ELECTRICAL CHARACTERISTICS: VDD = +5V and TA = – 55°C to +125°C, unless otherwise specified.
Parameter
Test Conditions
Min
Typ
Max
Units
Supply Voltage
Supply Current
Output Resistance
Output Current
4.5
—
—
300
—
—
—
T
18
600
75
V
µA
Ω
Output High or Low
Source/Sink, VCC = 18V
Source/Sink, VCC = 4.5V
At trip point
—
—
25
mA
mA
°C
°C
—
10
Absolute Accuracy
T – 3
3.5
T + 3
6.5
Trip Point Hysteresis
5
TelCom Semiconductor reserves the right to make changes in the circuitry or specifications detailed in this manual at any time without notice. Minimums
and maximums are guaranteed. All other specifications are intended as guidelines only. TelCom Semiconductor assumes no responsibility for the use of
any circuits described herein and makes no representations that they are free from patent infringement.
DETAILED DESCRIPTION
The TC626 output maintains a logic low state when
measured temperature is below the factory-programmed
setting. As temperature rises, the output is driven active to
SET POINT
a high level [VDD – (IOUT)(ROUT)] when temperature equals
the setpoint value ±3°C.
(SET POINT – 5°C)
Built-in hysteresis prevents output "chattering" when
measuredtemperatureisat(ornear)thetrippoint(Figure1).
As temperature falls through the trip point, hysteresis main-
tains the output high until measured temperature is 5°C
lower than the trip point setting.
OUTPUT
The TC626VZB (TO-92 package) has a maximum out-
put current of 10mA while the TC626VAB has a maximum
output current of 50mA. Care must be taken to observe
these output current limits as output currents in excess of
those stated will cause device self-heating resulting in
erroneous temperature measurements.
Figure 1. TC626 Operation
2-30
TELCOM SEMICONDUCTOR, INC.
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