LP8501 datasheet(26/51 Pages) TI1

26 / 51 page

LED brightness

(adjusted with PWM

duty cycle)

Time

Powersave mode if

brightness = 0

longer than 50 ms

POWER

SAVE

POWERSAVE

Time

Additional power

savings from PWM

powersave mode

Chip current consumption

(LED current not included)

LED brightness

(adjusted with PWM

duty cycle)

Time

Powersave mode if

brightness = 0

longer than 50 ms

Chip current consumption

(LED current not included)

POWER

SAVE

POWERSAVE

LP8501

SNVS548D – SEPTEMBER 2008 – REVISED AUGUST 2013

www.ti.com

PWM Cycle Power Save Mode

PWM cycle power save mode is enabled when the PWM_POWERSAVE bit in register 36h is set to '1'. In PWM

power save mode analog blocks are powered down during the down time of the PWM cycle. Blocks are powered

down depending upon whether an external or an internal clock is used. While the Automatic Power-Save Mode

saves energy when there is no PWM activity, the PWM Power-Save mode saves energy during PWM cycles.

Like the Automatic Power-Save Mode, PWM Power-Save Mode works also during program execution.

Figure 22. The Effect of Power-Save mode during a Lighting Sequence

Figure 23. The effect of Powersave and PWM Powersave modes during a lighting sequence

Logic Interface Operational Description

The LP8501 features a flexible logic interface for connecting to processor and peripheral devices.

Communication is done with and I2C-compatible interface; different logic input/output pins makes it possible to,

for example, trigger program execution or enable power saving for the device.

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LP8501 Datasheet(PDF) 26 Page - Texas Instruments

LP8501 Datasheet(HTML) 26 Page - Texas Instruments

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