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WM8351 Datasheet(PDF) 22 Page - Wolfson Microelectronics plc

Part # WM8351
Description  Wolfson AudioPlus??Stereo CODEC with Power Management
PDF  330 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8351 Datasheet(HTML) 22 Page - Wolfson Microelectronics plc

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WM8351
Production Data
w
PD, April 2012, Rev 4.5
22
7.5
BATTERY CHARGER
Test Conditions
TA = +25ºC unless otherwise noted.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
General
Wall adaptor voltage
LINE
When charging from
wall adaptor
4.0
5.5
V
USB voltage
USB
When charging from
USB power rail
4.0
5.5
V
Target voltage
CHG_VSEL=00
4.0
4.05
4.1
V
CHG_VSEL=01
4.05
4.1
4.15
CHG_VSEL=10
4.1
4.15
4.2
CHG_VSEL=11
4.15
4.2
4.25
Defective battery threshold
2.85
V
End of Charge Current
EOC
Programmable in
register R168
CHG_EOC_SEL bits
20 to 90
mA
Trickle Charging
Trickle charge initiation
threshold (WM8351 starts trickle
charging when battery is below
this threshold)
CHG_VSEL -
100mV
V
50mA trickle charge current
CHG_TRICKLE_SEL
= 0 (default)
35.9
mA
100mA trickle charge current
CHG_TRICKLE_SEL
= 1
78.6
mA
Fast Charging
Fast charge threshold (WM8351
can only fast-charge if battery is
above this threshold)
3.1
V
Maximum fast-charge current
IMAX
750
mA
Backup Battery (VRTC)
Backup battery charger output.
(Note that this backup charger
voltage also determines the
UVLO threshold.)
2.5
2.7
2.9
V
7.6
CURRENT LIMIT SWITCH
Test Conditions
TA = +25ºC unless otherwise noted.
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
Maximum input voltage
2.7
LINE
V
On resistance (at 3.3V)
2.0
Ω
Current limit flag threshold
180
mA
Current limit
215
mA
Quiescent current (EN but not ON)
7
µA
Quiescent current (EN and ON)
µA



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