ISL976787IBZ Просмотр технического описания (PDF) - Renesas Electronics

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ISL976787IBZ

4-Channel LED Driver with Phase Shift Control and 10-Bit Dimming Resolution

Renesas Electronics 

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

Page 10 of 24

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