ISL97687
Typical Performance Curves (Continued)
I_INDUCTOR
V_STV
I_INDUCTOR
V_STV
V_CH1
V_CH2
FIGURE 16. VSYNC ENABLED DIMMING WITHOUT PHASE SHIFT
(VIN: 19V, ICH: 120mA, LEDs: 4P18S, 180Hz OUTPUT
PHASE AND FREQUENCY LOCKED TO 60Hz STV)
V_CH1
V_CH2
FIGURE 17. VSYNC ENABLED WITH PHASE SHIFT (VIN: 19V,
ICH: 120mA, LEDs: 4P18S, 180Hz OUTPUT PHASE
AND FREQUENCY LOCKED TO 60Hz STV)
V_CH
V_PWM
I_INDUCTOR
I_CH
I_CH
FIGURE 18. PWM SWITCHING AND TRANSIENT RESPONSE OF
INDUCTOR CURRENT
FIGURE 19. MINIMUM DIMMING DUTY CYCLE (0.05%, fDIM: 500Hz,
ICH = 120mA, DIRECT PWM MODE)
FN7714 Rev.3.00
Sep 13, 2017
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