L5961 데이터 시트보기 (PDF) - STMicroelectronics

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L5961

MOST power management device (PMD)

STMicroelectronics 

L5961

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Functionality details

Functionality details

● Provides three basic states:

– Zero power mode

All external HW is switched off. PM-chip is switched Off except "REG1 voltage

regulator", "Switch-to-power-pulse comparator" and "Control logic".

– Ultra zero power mode

All external HW is switched off. PM-chip is switched Off except "ON/OFF Control

logic". PMD can be woken up to reach "Zero current mode" by activities on

DIAG_I/O line

– Normal

PMD and external HW is powered. One of the four possible wake-up conditions

occurs and the wake-up event is confirmed either by means of PWROFF pin or

I2C bus.

To confirm the on-event:

- PWROFF pin must be driven low OR

- the right I2C bus command is provided.

● Reacts on four different wake-up events

– Switch to power pulse (STPP)

– Light ON (for status)

– Activity on Diag_I/O

– ON/OFF switch

● I2C interface (allowing system programmability)

● Generation of switch to power pulse (STPP)

● Online battery monitoring, reacts on battery changes/ events:

– Over voltage

– Critical voltage

– Under voltage

● Hardware watchdog triggered with discrete input, available to monitor the activity of the

controller

● Fail-safe behavior:

– Intrinsic filtering time of wake-up events

– Protection against software caused failures

– Over-temperature warning / thermal protection

● Diagnostic transceiver compatible to standard LIN2.0

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