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.
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)
Mechanical Specifications
Dimensions | 9" H x 7.5" W x 11.5" D |
Weight | 7 lbs |
Ordering Information
Part Number: Rjc-Liquid-Sensor
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