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L5961 Datasheet(PDF) 3 Page - STMicroelectronics

Part No. L5961
Description  MOST power management device (PMD)
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5961 Datasheet(HTML) 3 Page - STMicroelectronics

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L5961
Functionality details
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2
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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