This document will describe the testing and results obtained from supplying DCDC, validating discharge, efficiency and doing a transient analysis.
smoke test:
-works
Efficiency
note there is a 4A current limit on the input power supply, because below this cannot overcome the ICLs and bulk caps
Test number: 1,2
input voltage: 90.6, 90.6, 90.6, 90.5, 130V, 130, 130, 130, 143, 143, 143, 143
Output voltage: 13.69, 13.66, 13.578, 13.108, 13.69V, 13.38, 13.68, 13.08, 13.68, 13.58, 13.36, 13.094
input current: 0.4, 0.9, 1.73, 2.69, 0.27A, 1.2, 0.26, 1.87, .57, 1.09, 1.69
output current: 2, 5, 10, 16, 5A, 10, 2, 16, 2, 5, 10, 16
voltage after ICLs and fuse:85.5, 86.6, 87.3, 87.6, 125.2V(3.82 drop on ICL), 126.3(2.9 icl 70C other is 31C), 127.4(2.2 icl 50C and 31C), 126.8 (2.3V icl 107C and 37C), 138.2 (4.3V icl 33C and 31C), 137.8V (4.0V icl 55C and 40C), 139V (3.0V icl 81C and 37C), 139.7 (2.4 icl 97C and 37C)
Discharge circuit
Transient Analysis
states:
steps with load (steps by 1, 10, 15A)
turning on and ramping supply
turning on supply in active region (<68 >50)
turning on supply (>68)
Ripple Output at various conditions
Audible noise
Heating
at 90V input 1.73 A input and 10A output, ntc3 is 90c and ntc2 is 40 → vdrop was 2.4V
at 90V input 2A output 12A, ntc3 is 107c and ntc2 is 37c <-dependent on placement of thermistor of icl surface → vdrop is 2.2V
at 90V input 2.69A output 16A, ntc3 was 150C, ntc2 was 30C
Fault Mode