SC5014MLTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC5014MLTRT

High Efficiency 4-Channel HB LED Driver with I2C Interface and Phase-Shifted PWM Dimming

Semtech Corporation 

SC5014

Definition of Registers and Bits (continued)

Bit Field Definition Read / Write Description

0x09 [2:0]

STEP_MUL

[2:0]

R/W

Used to speed up fade time, when selected LED PWM dimming frequency is low. Define a 2N

multiplier of the fade amount.

STEP_MUL[2:0] = 000, N=0, multiplier = 1

STEP_MUL[2:0] = 001, N=1, multiplier = 21 = 2

STEP_MUL[2:0] = 010, N=2, multiplier = 22 = 4

STEP_MUL[2:0] = 011, N=3, multiplier = 23 = 8

STEP_MUL[2:0] = 100, N=4, multiplier = 24 = 16

STEP_MUL[2:0] = 101~111, N=5, multiplier = 25 = 32

Fade Rate Register

Bit Field

0x0A [6:0]

Definition Read / Write Description

FADE_RATE

[6:0]

R/W

Defines how often the duty is changed during a fade.

Fade rate = PWM Output Rate / (1 + FADE_RATE[6:0])

31

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