FN8808 datasheet(19/44 Pages) RENESAS

19 / 44 page

ISL78227

FN8808 Rev.6.02

Page 19 of 43

Feb 28, 2025

FIGURE 23. ANALOG TRACKING 100Hz SINUSOIDAL SIGNAL, CCM

MODE (DE/PHDRP = GND), ATRK/DTRAK = VCC,

IOUT = 1A

FIGURE 24. ANALOG TRACKING 300Hz SINUSOIDAL SIGNAL AT THE

TRACK PIN, CCM MODE (DE/PHDRP = GND),

ATRK/DTRAK = VCC, IOUT = 1A

FIGURE 25. STEADY-STATE OPERATION OF INPUT CONSTANT

CURRENT MODE, IIN CONTROLLED AT 43A CONSTANT,

VOUT = 19.5V

FIGURE 26. DIGITAL TRACKING (TRACKING SIGNAL,

FREQUENCY = 400kHz, D_TRACK = 0.5), VOUT = 28.3V

FIGURE 27. LOAD CURRENT KEEP INCREASING FROM NO LOAD TO

OVERLOAD (25A), VOUT STARTS TO DROP WHEN INPUT

CONSTANT CURRENT MODE STARTS TO WORK, INPUT

CURRENT IS FINALLY CONTROLLED TO BE CONSTANT

FIGURE 28. DIGITAL TRACKING (TRACKING SIGNAL,

FREQUENCY = 400kHz, D_TRACK = 0.3), VOUT = 17V

Performance Curves Unlessotherwisespecified,operating conditionsfortheoscilloscopewaveformsareV

IN = 12V,

VOUT = 36V, and TA = +25°C. (Continued)

FB 300mV/DIV

TRACK 300mV/DIV

VOUT 6.8V/DIV

PH1 20.0V/DIV

2ms/DIV

FB 300mV/DIV

TRACK 300mV/DIV

VOUT 6.8V/DIV

PH1 20.0V/DIV

2ms/DIV

VOUT 30.0V/DIV

I_IN 16A/DIV

IMON 500mV/DIV

PH1 30.0V/DIV

50µs/DIV

VOUT 7.0V/DIV

TRACK 4.0V/DIV

PH2 40.0V/DIV

PH1 40.0V/DIV

1µs/DIV

VOUT 30.0V/DIV

I_IN 16A/DIV

IMON 500mV/DIV

PH1 30.0V/DIV

1s/DIV

VOUT 7.0V/DIV

TRACK 4.0V/DIV

PH2 40.0V/DIV

PH1 40.0V/DIV

1µs/DIV

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