52421
SOLID STATE THERMOSTAT CONTROLLER
Space Application Series...
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
•
•
•
Operates With RTD Temperature Sensor
Output Is Either “ON” Or “OFF”
Standard And Custom Factory Settings Of:
- Resistance Control Set Points (Temperatures),
- Hysteresis, (Minimum/Maximum) And
- Timing (On/Off Delays)
-
Test (Load Power On/Off) Capability
Optional Mounting Configurations Available
Applications:
Meets The Demanding Requirements Of
Space
Platform Environments,
Where Precise
Temperature Control Is Required.
•
DESCRIPTION
Micropac’s Space level Thermostat Controller 52421 operates with external RTD (Resistance Temperature Device)
temperature sensor and provides a power switched (On / Off) output within a temperature window. The RTD sensor is
conditioned then controls a high-side MOSFET power switch for an external HEATER.
Models are available with dual channels providing either “OR” or “AND” configurations.
Wired combinations of the “OR” configuration device, along with a single channel device, provides a tri-redundancy
control system which guarantees both the power ON and power OFF states of the Heater
ABSOLUTE MAXIMUM RATINGS
Operating Temperature (T
A
)
........................................................................................................................
-55°C to +125°C
Storage Temperature (T
STG
)
.......................................................................................................................
-65°C to +165°C
Maximum Steady State V
IN
..............................................................................................................................
+132 Volts DC
Peak Transient Input V
IN(T)
...........................................................................................................
+180 Volts DC for 5 Secs.
Steady State Load Current…(Source or Sink)
......................................................................................................
1.1Amps.
APPLICABLE QUALITY STANDARDS OF MICROPAC INDUSTRIES, INC.
•
•
•
•
MIL-PRF-38534 Class H and Class K Qualified.
MIL-PRF-19500 JAN S Qualified.
MIL-STD-883 Test Methods and Procedures
ISO 9001 Quality Standard
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
12/18/01
52421
SOLID STATE THERMOSTAT CONTROLLER
GENERAL ELECTRICAL SPECIFICATIONS
(25°C unless otherwise stated)
TEST
Quiescent Power Supply
Current
Over voltage
Current Spikes
Heater Current
Output Off Current
CONDITIONS
Terminal #1 = +126 VDC
I
LOAD
(Terminals 3 and 4) = 0 A
RTD = Max
Between Terminals #1 and #2 = +180 VDC
For 5 seconds
RTD = Min
Terminals #3 - #4 = Heater Load
Terminal #1 = +120 VDC
Terminal #1 = +126 VDC
Between Terminals #3 and #4 =
R shunt
≤
10 ohms
RTD = Max
T
CASE
= 25°C
T
CASE
= 125°C or T
CASE
= -55°C
Terminal #1 = +120 VDC
Test Load, 120 ohms
±5%,
250 Watts
RTD = Min
V
SAT,
Measured between Terminals #4 and #2
T
CASE
= 25°C
T
CASE
= 125°C or T
CASE
= -55°C
Terminal #1 = +120 VDC
RTD = Max
As Measured between Terminals #8 and #9
Terminal #1 = +120 VDC
RTD switched Max to Min
Measuring the 10-90 time of the rising Heater
Load Current, Terminals #3 and #4
Terminal #1 = +120 VDC
RTD switched Min to Max
Measuring the 90-10 time of the falling
Heater Load Current, Terminals #3 and #4
MIN
MAX
5.5
50.0
UNITS
mA
mA
A
1.1
±250
±1
uA
mA
Full Load
Saturation Voltage
1.9
2.8
5,000,000
1.0
V
V
Ω
mS
Self Test
Input
Impedance
On Time,
Load Current
Off Time,
Load Current
2.0
mS
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
12/18/01
52421
SOLID STATE THERMOSTAT CONTROLLER
DUAL CHANNEL TERMINAL NUMBER DESCRIPTION
TERMINAL
1
2
3
4
5
6
7
8
9
REF
Vin
AGND
+H
-H
RTD1-H
RTD1-L
RTD1-S
ST1
ST1 Return
DESCRIPTION
Positive power supply voltage
Power return for all function
Current source for Heater (High Side)
Current return for Heater
Current source for RTD #1
Current return RTD #1
for RTD #1 Shield to case
Self Test #1, “ON”
Self test #1 Common
Package Dimensions
TYPICAL PRESET “RTD” PROFILES AVAILABLE
P/N TBD
-80°F
-73°F
P/N TBD
-70°F
-63°F
P/N TBD
-10°F
-3°F
P/N TBD
-60°F
-53°F
P/N TBD
0°F
7°F
P/N TBD
-50°F
-43°F
P/N TBD
-42°F
-35°F
Ton
Toff
Ton
Toff
P/N TBD
-28°F
-21°F
P/N TBD
23°F
30°F
RTD SENSORS
NOT PROVIDED
BY Micropac Industries, Inc.
The above preset thresholds and switching levels are based on the use of standard 1000 ohm RTDs.
Example: IEC-751, 1000 ohms at 0°C (ice point), resistance curve with an alpha of 0.003891 and with
an error not to exceed 0.75
°F.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
12/18/01
52421
SOLID STATE THERMOSTAT CONTROLLER
Functional Block Diagram
+120Vdc
1
FILTER
VOLTAGE
REFERENCE
POWER
XISTOR
0Vdc
2
5
6
T
7
SELF TEST
DRIVER
BRIDGE/
CONTROLLER
11
SELF TEST
3
10
4
CASE
`
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
12/18/01
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