Datasheet

DS_INLC10AQ Revision 1.0_B

Inova Semiconductors Confidential

Page 23 of 35

4.2.2 Update

When a new PWM duty cycle has to be applied, this is always done at the end of a PWM cycle. I.e. the

PWM always completes an output cycle using the previously active duty cycle and starts the next output

cycle using the updated duty cycle.

4.2.3 Phase Shift

In order to spread the current consumption of the LEDs over time, a phase shift can be set between the

three PWM channels. This optional function can be enabled/disabled during device initialization.

If the phase shift is deactivated, the red channel controls all three outputs and thus provides the temperature

compensation function for all three channels.

If the phase shift is enabled, it retains even if the output frequency of the channels is different. If a channel

is operating at a lower frequency, it may be considered to leave out one or three full PWM cycles. When

leaving power save mode, the channels are restarted appropriately to again obtain the correct phase shift.

The fixed phase shift is defined in the following table. Please note the absolute phase shift times are nominal

values. I.e. they are subject to vary with the internal

oscillator’s frequency.

PWM Channel

Rel. Phase Shift

Unit

Abs. Phase Shift

Green

0

%

0

Red

25

%

0.25 / PWM Frequency

Blue

75

%

0.75 / PWM Frequency

Table 21

– Phase shift

Figure 17

– Optional phase shift