LP5562 datasheet(12/52 Pages) TI1

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W PWM

R PWM

G PWM

B PWM

ENGINE 1

ENGINE 2

ENGINE 3

W LED

PWM

R LED

PWM

B LED

PWM

G LED

PWM

W_ENG_SEL bits

00 - 10

ENG1_MODE bits

ENG2_MODE bits

ENG3_MODE bits

R_ENG_SEL bits

G_ENG_SEL bits

B_ENG_SEL bits

SVA-30197406

LP5562

SNVS820A – APRIL 2013 – REVISED SEPTEMBER 2015

www.ti.com

Figure 14. Controlling LED Outputs

The LED driver PWM control with 8-bit I2C register is defined in Table 2.

Table 2. LED Driver PWM Control Bits Register 70h

NAME

BIT

DESCRIPTION

LED PWM value during I2C control operation mode

PWM

7:0

0000 0000 = 0% PWM

1111 1111 = 100% PWM

If the LED driver outputs are controlled with engines, the engine adjusts the PWM according to the program

code. However, when the engine mode bits are set to ‘11’, the engine is set to direct mode. In direct mode the

PWM controls of engines comes:

•

Engine 1 PWM control comes from B PWM I2C register (02h)

•

Engine 2 PWM control comes from G PWM I2C register (03h)

•

Engine 3 PWM control comes from R PWM I2C register (04h)

When the engine mode bits are set to '11' along with the LED PWM Output selection bits, it is possible to control

all LED outputs from one I2C register.

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