ADP5065 Analog Devices, ADP5065 Datasheet - Page 19

• Manufacturer Part Number: ADP5065
• Description: Fast Charge Battery Management with Power Path and USB Compatibility
• Manufacturer: Analog Devices

Specifications of ADP5065

• Product Description: Fast Charge Battery Management with Power Path and USB Compatibility
• Switching/linear: Switching
• Cell Type: Li-Ion
• Final Voltage Options: 4.2
• Accuracy Over Temp (%): 0.3%
• Temp Range: -40 to +125°C
• Package: WLCSP-20
• Active For Param Search: Yes

Data Sheet
Safety Timer
If the watchdog timer (see the Watchdog Timer section for
more information) expires while in charger mode, the
charger initiates the safety timer, t
programmed charging parameters by this time, the I
to the default value. Charging continues for a period of t
then the charger switches off and sets the CHARGER_STATUS
register.
Charge Complete
The
in constant voltage fast charge mode. If the current falls
below I
and the CHDONE flag is set. If the charging current falls
below I
the t
Recharge
After the detection of charge complete, and the cessation of
charging, the
the battery discharges through normal use. If the BAT_SNS pin
voltage falls to V
most circumstances, triggering the recharge threshold results
in the charger starting directly into fast charge constant
voltage mode.
Battery Charging Enable/Disable
The
the I
THERMAL MANAGEMENT
Isothermal Charging
To assist with the thermal management of the
charger, the battery charger provides an isothermal charging
function. As the on-chip power dissipation and die temperature
increase, the
limits output current when the temperature reaches T
(typically at 115°C). The die temperature is maintained at
T
battery. A reduction in power dissipation or ambient
temperature may allow the charging current to return to its
original value, and the die temperature subsequently drops
below T
flag is set to high.
LIM
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END
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2
through the control of the charging current into the
C EN_CHG bit to low.
END
END
timer resets.
LIM
. During isothermal charging, the THERM_LIM
and remains below I
for less than t
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ADP5065
charger monitors the charging current while
charging function can be disabled by setting
RCH
, the charger reactivates charging. Under
charger monitors die temperature and
charger monitors the BAT_SNS pin as
END
and then rises above I
END
SAFE
for t
. If the processor has
END
, charging stops
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END
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LIM
again,
LIM
is set
SAFE
Rev. A | Page 19 of 40
,
Thermal Shutdown and Thermal Early Warning
The
threshold detector. If the die temperature exceeds T
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The
temperature drops below the T
140°C bit is reset. To reset the TSD 140°C bit, write to the I
Fault Register 0x0D or cycle the power.
Before die temperature reaches T
set if T
power consumption before thermal shutdown occurs.
Fault Recovery
Before performing the following operation, it is important to
ensure that the cause of the fault has been rectified.
To recover from a charger fault (when the CHARGER_STATUS
equals 110), cycle power on VINx or write high to reset the
I
BATTERY ISOLATION FET
The
FET for power path control. The battery isolation FET isolates a
deeply discharged Li-Ion cell from the system power supply
in both trickle and fast charge modes, thereby allowing the
system to be powered at all times.
When VINx is below V
full conducting mode.
The battery isolation FET is off during trickle charge mode.
When the battery voltage exceeds V
FET switches to the system voltage regulation mode. During
system voltage regulation mode, the battery isolation FET
maintains the V
battery voltage exceeds V
full conducting mode.
The battery isolation FET supplements the battery to support
high current functions on the system power supply.
When voltage on ISO_Sx drops below ISO_Bx, the battery
isolation FET enters into full conducting mode.
When voltage on ISO_Sx rises above ISO_Bx, the isolation
FET enters regulating mode or full conduction mode, depending
on the Li-Ion cell voltage and the dc-to-dc charger mode.
2
C fault bits in the fault register.
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SDL
is exceeded. This allows the system to accommodate
charger is disabled, and the TSD 140°C bit is set.
switching charger features a thermal shutdown
charger can be reenabled when the die
charger features an integrated battery isolation
ISO_SFC
voltage on the ISO_Sx pins. When the
VIN_OK
ISO_SFC
, the battery isolation FET is in
, the battery isolation FET is in
SD
SD
falling limit and the TSD
, the early warning bit is
TRK
, the battery isolation
SD
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, the
2
C