Recommended Test Equipment
The following is a list of recommended test equipment.
1. Safety glasses
2. DC power supply: Refer to the specific DCM model datasheet to ensure the supply has
sufficient power and current capability, especially at low line, to satisfy current inrush when the
DCM is started
3. Electronic load: Refer to the specific DCM model datasheet to ensure the load has sufficient power
handling and current capability for testing
4. Cooling fan
5. Digital multi-meters (DMMs)
6. Oscilloscope and probes
7. Function generator
8. Auxiliary bench voltage supply (optional, for bias of secondary side fault monitor opto-coupler)
9. Interconnect wires, cables and fastening hardware
10. Calibrated input and output shunts, appropriately rated
11. Thin bladed tool for extracting wires from paralleling connectors
(AVX 06-9276-7001-01-000 or similar)
Basic Connections
ꢀnConfirm bench equipment is powered off.
ꢀnConnect the input DC power supply positive lead to the +IN input lug of the evaluation board,
connect the input power supply negative lead to the –IN input lug of the evaluation board.
ꢀnConnect the CHASSIS_GROUND lug of the evaluation board to a safety “green wire” earth ground.
ꢀnConnect the +OUT lug of the evaluation board to the electronic load positive input, connect the
–OUT lug of the evaluation board to the electronic load negative input.
ꢀnDirect airflow from the cooling fan through the DCM heatsink fins.
ꢀnHave the latest DCM datasheet on hand for reference.
Board Operation Details
ꢀnSW01 provides control over enable.
ꢀnIn the “OFF” position, the switch will connect SG the EN net, which disables the DCM.
ꢀnIn the “ON” position, SG is disconnected from the EN net.
ꢀnExternal connection to EN is permitted using the PRI_EN testpoint. SW01 should be set to “ON” to
permit external control.
ꢀnThe J02 & J03 paralleling connectors can be used to connect EN nets across different boards.
Note: to enable the DCMs in a parallel array, all boards need SW01 set to “ON” to avoid pulling the
EN node low.
UG:017
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Applications Engineering: 800 927.9474
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