Rjc Liquid Cooled Test Fixture
The Analysis Tech Rjc Liquid Cooled Test Fixture is a high performance liquid-cooled heat sink with convenient electrical connections to the device-under-test. This fixture is ideally suited for measuring junction-to-case thermal resistance for all device types including IGBT modules and large MOSFET packages, and is well-suited for JEDEC 51-14 method testing. Temperature controlled coolant water must be supplied to the fixture from a recirculating chiller. Drip-free quick-connect hose fittings are provided for convenient connection of the coolant hoses.
A top-mounted combination plug/screw connector provides high-current heating-power connections to the device-under-test. The side-mounted edge-card connector provides duplicate low-current terminals, convenient for part-specific wiring and kelvin connections. This design allows the fixture to be quickly reconfigured for any part-type by swapping the part-specific, two-connector wiring harness. The backside case temperature of the device-under-test is sensed with a built-in spring loaded TC Sensor. Additionally, a thermocouple port is also provided for measuring the coolant inlet temperature as specified in JEDEC 51-14.
The device-under-test is clamped to the heat sink surface with a special pneumatic clamp, shown above. The pneumatic clamp offers a regulated and measured clamping force that will not change with temperature induced dimensional changes of the sample. The air cylinder used is a special air-balance cylinder with fluidic bearing that provides very accurate force measurement and control. For larger packages, convenient tapped holes (10-32 size) are provided to accommodate many common device/module footprints. The positioning jig is also provided for easy and consistent placement of devices with respect to the case thermocouple.
Note: The solid copper nickel plated cooling stage is typically connected to ground through the coolant water conduction, therefore devices with an electrically "live" connection to package (and thus the cooling stage) require the use of distilled water or non-aqueous, dielectric coolants. Contact Analysis Tech for additional information.
Rjc-Liquid Performance Specifications
RHeat Sink = (TPlate - T Inlet Water) / Power
|Sink Thermal Resistance (RHS)||Coolant Flow Rate (Liter/min. - H2O)|
|0.016 °C/W||6.0 LPM|
|0.014 °C/W||8.0 LPM|
|0.012 °C/W||10.0 LPM|
|0.011 °C/W||12.0 LPM|
(Maximum Pressure Required: 400 kPa (60 psi)
|Dimensions||9" H x 7.5" W x 11.5" D|
Part Number: Rjc-Liquid-Sensor
Standard delivery 3 weeks. Ex Works (EXW)
A complete plumbing and air supply tubing kit to go with the Liquid Rjc Fixture is available for purchase:Coolant Hoses and Compressed Air Lines with Quick-Disconnects