LP3913SQX-AC/NOPB National Semiconductor, LP3913SQX-AC/NOPB Datasheet - Page 28

• Manufacturer Part Number: LP3913SQX-AC/NOPB
• Description: IC PWR MANAGEMENT W/CHRGR 48-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3913SQX-AC/NOPB

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 2.5 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: LP3913SQX-AC

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Access
Data
Reset
PON Register (00)h Power On Event Register
External Power and Battery Detection
When a Wall Adapter is detected, regardless of the battery
voltage, the LP3913 moves to the Active Mode and the Pow-
er-up sequencer is started. Similar to the ONOFF pin, there
is a 32 ms deglitch time to ensure a clean wall adapter de-
tection and the system processor needs to set the PACK bit
(D4) in the PON register or the POWERACK pin within 128
ms (max) of the start of the power-up sequencer.
When USB PWR is detected and the battery is above the low
battery alarm threshold, the LP3913 moves to the Active
Mode and the Power-up sequencer is started. Similar to the
ONOFF pin, there is a 32 ms deglitch time to ensure a clean
USB detection and the system processor needs to set the
PACK bit (D4) in the PON register or the POWERACK pin
D7–5
Read Only 0
Reserved
n/a
D4
rw
PACK
0: Disable Power,
go in standby, and
wait for power on
event.
1: Acknowledge
Power On request
0
D3
Read Only
Battery Insert
0: default
1: Battery Insert
caused by Battery
Insertion
0
28
D2
PON by ONOFF
0: default
1: ONOFF caused
Power On event
0
within 128 ms (max) of the start of the power-up sequencer.
If the battery is below the low battery alarm threshold, the
system will remain powered down until the USBPWR charges
the battery up to the battery low alarm threshold, at which
point the power-up sequencer is started.
The four LSB bits of the PON register indicate which PON
source was responsible for moving the LP3913 out of standby
and into active mode:
These bits are cleared upon powering off.
Battery insert
ONOFF push button
CHG_IN detect (connection of power adapter)
USB power (plug-in of powered USB cable)
D1
PON by CHG_IN
0: default
1: Power On caused
by CHG_IN power
detection
0
D0
PON by USB
Power
0: default
1: Power On caused
by USB power
detection
0