UCC28700-Q1_15 Datasheet, PDF (29/38 Pages) Texas Instruments – Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28700-Q1
SLUSC61 – JANUARY 2015
Device Support (continued)
11.1.1.8 Resistance Terms in Ω
R_CS
R_ESR
R_PL
R_S1
R_S2
R_STR
R_STR
primary current programming resistance
total ESR of the output capacitor(s).
preload resistance on the output of the converter.
high-side VS pin resistance.
low-side VS pin resistance.
maximum start-up resistance to achieve the turn-on time target.
V_DD start-up resistance.
11.1.1.9 Timing Terms in Seconds
T_D
T_DMAG(min)
T_ON(min)
T_R
T_STR
current-sense delay including MOSFET turn-off delay; add 50 ns to MOSFET delay.
minimum secondary rectifier conduction time.
minimum MOSFET on time.
resonant frequency during the DCM (discontinuous conduction mode) time.
converter start-up time requirement.
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