52421 MICROPAC | Alldatasheet
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Technical content
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
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 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 CONDITIONS MIN MAX UNITS Quiescent Power Supply Current Terminal #1 = +126 VDC ILOAD (Terminals 3 and 4) = 0 A RTD = Max 5.5 mA Over voltage Current Spikes Between Terminals #1 and #2 = +180 VDC For 5 seconds RTD = Min 50.0 mA Heater Current Terminals #3 - #4 = Heater Load Terminal #1 = +120 VDC 1.1 A Output Off Current Terminal #1 = +126 VDC Between Terminals #3 and #4 = R shunt ≤ 10 ohms RTD = Max T CASE = 25°C TCASE = 125°C or TCASE = -55°C ±250 uA mA Full Load Saturation Voltage Terminal #1 = +120 VDC Test Load, 120 ohms ±5%, 250 Watts RTD = Min V SAT, Measured between Terminals #4 and #2 TCASE = 25°C TCASE = 125°C or TCASE = -55°C 1.9 2.8 V V Self Test Input Impedance Terminal #1 = +120 VDC RTD = Max As Measured between Terminals #8 and #9 5,000,000 Ω On Time, Load Current Terminal #1 = +120 VDC RTD switched Max to Min Measuring the 10-90 time of the rising Heater Load Current, Terminals #3 and #4 1.0 mS Off Time, Load Current Terminal #1 = +120 VDC RTD switched Min to Max Measuring the 90-10 time of the falling Heater Load Current, Terminals #3 and #4 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 REF DESCRIPTION
1 Vin Positive power supply voltage
2 AGND Power return for all function
3 +H Current source for Heater (High Side) 4 -H Current return for Heater
5 RTD1-H Current source for RTD #1
6 RTD1-L Current return RTD #1
7 RTD1-S for RTD #1 Shield to case
8 ST1 Self Test #1, “ON”
9 ST1 Return Self test #1 Common
TYPICAL PRESET “RTD” PROFILES AVAILABLE P/N TBD P/N TBD P/N TBD P/N TBD P/N TBD Toff -73°F -63°F -53°F -43°F -35°F P/N TBD P/N TBD P/N TBD P/N TBD Ton -28°F- 1 0 °F0 °F2 3 °F Toff -21°F- 3 °F7 °F3 0 °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. Package Dimensions
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 REFERENCE VOLTAGE BRIDGE/ CONTROLLER POWER XISTOR DRIVER SELF TEST SELF TEST +120Vdc 0Vdc T FILTER Functional Block Diagram CASE