It requires that the load is disabled before enabling the output otherwise it will not enable the output. If the load is reduced to ~ <1A it will start.
SETUP:
Vin 48V,
CLMODE: 1K for continuous mode 0.5 ratio, and external
Rimon 5.3K
SETI: 5A
COUT 1320uF on board,
Enable control is a physical switch.
Using a Siglent SDL1020X Electronic load in CR (Resistance) mode (also tried CP mode).
Scope traces: C1 Yellow: VOUT, C2 Pink: IMon, C3 Blue Enable, C4 Green: Fault
Start with no load (just Cout)
Starting with load disabled but connected
Starting the load
Start with load enabled.
The intended purpose of the circuit is to control current being supplied to a series of daisy chained radio devices on a single co-ax powered by DC bias on the cable. The system is quite long at 3500-4000m, with significant v drop along the cable due to distributed loads. I want the system to go into current limit if a cable fault or device malfunctions for diagnostic / fault finding purposes, and to protect devices on the network from overcurrent, and to be able to start under load in a fault condition. Am I looking at the wrong device here. Any hints as to why it won't start with the dcload?
Edit Notes
consise title (after further testing)[edited by: EvenNumber at 3:52 AM (GMT -5) on 9 Jan 2026]
