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參數(shù)資料
| 型號： | HY-5610 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SUBMINIATURE CONTROLLER FOR THERMOELECTRIC COOLERS |
| 中文描述： | 微型控制器的熱電冷卻器 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 88K |
| 代理商： | HY-5610 |
hytek
Microsystems
HY-5610
TEC CONTROLLER
hytek
Microsystems
400 Hot Springs Rd. Carson City NV 89706 (702) 883-0820 Fax -0827 www.hytek.com
DESCRIPTION OF THE HY-5610 PIN OUTS
*
Temperature Set Resistor Rs (Pin 1 to Pin 7)
*
Thermistor, R
(Pin 6 to Pin 7)
* Gain Set Resistor, R
(Pin 5 to Pin 6)
* Loop Stability Network, R and C
(Pin 3 to Pin 5)
* Current Limit Resistors, Rcc & R
(Pin 1 to Pin 3, and Pin 1 to Pin 2)
* V
(Pin 8 to Pins 11 & 12) +7 < V
< +20 Volts
* Vs (Pin 10 to Pins 11 & 12) +3 < Vs < +12 Volts
* Thermoelectric Cooler, TEC (Pin 9 to Pin 13)
The temperature set resistor for the HY-5610 controls the temperature at which the TEC will operate. When the circuit
has stabilized, the resistance of the thermistor will be equal to that of the set resistor Rs. For example, if a Dale 10k
thermistor is used as the temperature sensing device, a set resistor of approximately 56k
temperature of -10 C. A graph of Rs vs. set temperature is shown in figure 4 when using a Dale 1M1002 thermistor.
will set an operating
The thermistor should be located in close proximity to the device being temperature controlled by the TEC. It should
be in good thermal contact to avoid stability problems.
The HY-5610 has been designed for a negative temperature coefficient thermistor. A thermistor with a positive
temperature coefficient can also be used if the position of the temperature set resistor and temperature sensing resistor
are changed. The same result can also be achieved by reversing the leads of the TEC in which case Rcc & R
be interchanged.
must
The ratio of the gain set resistor R to R controls the response time of the servo loop. A ratio that is too large can
cause slow response and a ratio that is too small can cause loop instability. In most applications R may not be
needed since a 10M
resistor is internal to the HY-5610 and generally provides enough gain for good operation.
The RC time constant of these two components is a first approximation of the thermal time constant of the servo loop.
The thermal time constant of the combination of the device being cooled, the thermistor, and the TEC can be
approximated by applying constant power to the TEC and measuring the length of time it takes to reach 66% of it’s
final temperature.
For example, if the thermal time constant was observed to be 5 seconds, then a 1uF capacitor and a 4.7M
chosen as the loop stabilizing components. Typical values for loop compensation components are shown in Table 1.
could be
Note: The values of R , R , and C are generally selected by experiment. C should be a low leakage nonpolarized
capacitor.
These resistors limit the maximum current that the HY-5610 can supply to the TEC when in the cooling cycle and in
the heating cycle. Rcc limits the maximum current for the cooling cycle and R
heating cycle. This feature prevents damage to the TEC during turn-on. It is also often desirable to limit the
maximum value of heating current as much as 30% less than the maximum cooling current. This is because TECs
are much more efficient heating than cooling. Figure 5 shows the approximate values for Rcc & R
program a desired turn-on current. For example an Rcc value of 18K
Amperes and an R
value of 13.5K
will limit the maximum heating current to 0.6 Amperes.
CH
limits the maximum current in the
required to
will limit the maximum cooling current to 2
This input supplies the voltage to the internal circuitry of the HY-5610. The maximum current drain at this terminal is 5mA.
This input supplies the voltage to the HY-5610 power drive circuitry. The maximum current drain at this terminal
should not exceed 2 Amperes.
The cooling lead of the TEC should be connected to Pin 9 and the heating lead should be connected to Pin 13 of the
HY-5610. If the temperature of the thermistor is greater than the set temperature at turn-on, maximum cooling current
will flow into Pin 9 and out of Pin 13. Conversely, maximum heating current will flow into Pin 13 and out of Pin 9 if the
temperature of the thermistor is less than the set temperature at turn-on. The maximum turn-on current is limited by Rcc
and R
. Once the TEC reaches it’s set temperature, the current through the TEC will decrease to exactly the value
required to maintain the correct set temperature.
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