POWER LP28007 Internal integrate p-mosfet Datasheet

Preliminary Datasheet
LP28007
Single and Dual Cell Li+ Battery Charger IC –LP28007
General Description
Features
The LP28007 is a fully integrated low cost single-cell
Li-Ion battery charger IC ideal for portable
applications. The LP28007 is capable of being
powered up from AC adapter. The LP28007 enters
sleep mode when AC adapter is removed. The
LP28007 optimizes the charging task by using a
control algorithm including preconditioning mode, fast
charge mode and constant voltage mode. The
charging task is terminated as the charge current
drops below the preset threshold. The AC adapter
charge current can be programmed up to 1A with an
external resister. The internal thermal feedback
circuitry regulates the die temperature to optimize the
charge rate for all ambient temperatures. The
LP28007 features 18V maximum rating voltages for
AC adapter. The other features is under voltage
protection.
□ □
□ □
 Internal Integrate P-MOSFETs
 AC Adapter Power Good Status Indicator
 Charge Status Indicator
 Under Voltage Protection
 Automatic Recharge Feature
 Battery Temperature Monitoring
 Small 8-Lead MSOP(EP) Package
 Thermal Feedback Optimizing Charge Rate
 ROHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
Order Information
LP28007
 18V Maximum Rating for AC Adapter
8.4V Li-Ion
Battery Pack
□
F: Pb-Free
Package Type
MS: MSOP-8
Output Voltage
42: 4.2V
84: 8.4V
Applications

Portable Media Players/MP3 players



Cellular and Smart mobile phone
PDA/DSC
Bluetooth Applications
Marking Information
Device
Marking
Package
Shipping
LP28007
LPS
SP:MSOP-8
3K/REEL
LP28007
XXXX
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Preliminary Datasheet
LP28007
Functional Pin Description
P ac k age T y pe
P in C onf ig ur at i ons
ACIN 1
8 BATT
CHG_S 2
EMSOP- 8
9
PGOOD 3
PGND
7
NC
6
EN
5 ISETA
GND 4
Pin Description
P in N o
P in N ame
P in F unc t ion
1
AC I N
Wall Adapt or C har ge I nput Supply .
2
C H G_ S
C har ge St at us I ndic at or O ut put (O pen Dr ain) .
3
PG O OD
Pow er G ood I ndic at or O ut put ( O pen dr ain).
4
GND
G r ound.
5
I SET A
Wall Adapt or s upply c har ge c urr ent Set point .
6
EN
C har ge Enable I nput ( ac t iv e low ) .
7
NC
N o I nt er nal C onnec t ion.
8
BAT T
Bat t er y C har ge C ur r ent O ut put .
T his
pin pr ov ides c har ge c urr ent t o t he bat t er y
and
r egulat es t he f inal f loat v olt age t o 4. 2 or 8. 4V. An int er nal
pr ec is ion r es is t or div ider fr om t his pin s et s t he f loat v olt age
w hic h is dis c onnec t ed in s hut dow n mode.
9( Ex pos ed Pad)
PG N D
Ex pos ed Pad Should be s older ed t o PC B Boar d and
C onnec t ed t o G N D .
Note: LP28007-42MSF and LP28007-84MSF of Battery (Pin8) is output pin, the pin connects to Battery.
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Preliminary Datasheet
LP28007
Function Block Diagram
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Preliminary Datasheet
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Preliminary Datasheet
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Preliminary Datasheet
LP28007
Absolute Maximum Ratings (Notes 1.2)
VIN ,VBATT ,VCHGSB ,VPGOOD,VEN -----------------------------------------------------------------------------
-0.3V to 18V
Storage Temperature Range-------------------------------------------------------------------------- -65℃ to 150℃
VISETA ------------------------------------------------------------------------------------------------------------------------
-0.3V to 3.6V
Junction Temperature (TJ )--------------------------------------------------------------------------------------- 150℃
Lead Temperature (soldering, 10 sec.) ------------------------------------------------------------------------------------------ 260℃
Operating Ratings (Note 1, 2)
Supply Voltage --------------------------------------------------------------------------------------------------------- 4.5V to 13.5V
Thermal Resistance(θJA, Note 3)) --------------------------------------------------------------------------------------------20℃/W
Operating Temperature Range -----------------------------------------------------------------------------
-40℃ to 85℃
Thermal Resistance(θJA , Note 4)) ------------------------------------------------------------------------------------------- 8.5℃/W
Electrical Characteristics
(TA=25℃, VIN=10V; unless otherwise specified.)
Symbol
VIN
Parameter
Input Operating
Conditions
Min
Voltage
9
Range
Charge Mode. RSET=30K
Standby Mode (Charge
Icc
Terminated)
Input Supply Current
Typ
Max
Units
15
V
300
uA
250
UA
190
uA
Shutdown Mode (RSET Not
Connected VIN < VBATT or VIN
< Vuv)
VFLOAT
Regulated Output(Float)
0℃ ≦ TA ≦ 85℃
8.316
Voltage
RSET=1.5k,Current
Mode
RSET=0.75k,Current Mode
IBATT
BATT Pin Current
Trickle Charge Current
LP28007 – 02
Trickle
Charge
Threshold
500
mA
1000
mA
0
1
uA
Shutdown Mode
-1
0
1
uA
Sleep Mode, VIN=0V
-1
0
1
uA
RSET=1.5K
VBATT<VTRICKLE,
RSET=1.5K, VBATT Rising
Voltage
May.-2013
V
-1
RSET=0.75K
VTRICKLE
8.484
Standby Mode, VBATT=8.4V
VBATT<VTRICKLE,
ITRICKLE
8.4
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60
mA
120
mA
5.8
V
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Preliminary Datasheet
V TRHYS
VMSD
VASD
ITERM
VSET
ICHG_SB
VCHG_SB
VPGOOD
Trickle
Charge
Hysteresis
LP28007
RSET=1.5K
Voltage
250
mV
Manual Shutdown Threshold
ISETA
Pin Rising
2.15
V
Voltage
ISETA
Pin Falling
2.05
V
VIN – VBATT Lockout
Vin from High to Low
30
mV
Threshold Voltage
Vin from Low to High
60
mV
C/10Termination Current
RSET=1.5K
0.1
mA/ mA
Threshold
RSET=0.75K
0.1
mA/ mA
ISETA pin Voltage
RSET=1.5K,Current Mode
1.5
V
CHG_SB Pin Weak Pull-Down
VCHG_SB=5.0V
25
uA
0.35
V
0.35
V
Current
CHG_SB Pin Output Low
ICHG_SB=5mA
Voltage
PGOOD Pin Output Low
IPGOOD_SB=5mA
Voltage
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Precharge
BATT Pre-Charge Rising Threshold
VPRECH
2.6
2.8
3
V
BATT Pre-Charge Threshold Hysteresis
∆VPRECH
50
100
200
mV
Pre-Charge Current
IPCHG
8
10
12
%
60
100
150
mV
--
10
--
%
--
65
--
--
220
--
mV
VIH
1.5
--
--
V
VIL
--
--
0.4
V
VBATT=2V
Recharge Threshold
BATT
Pre-Charge
Falling
Threshold
Hysteresis
∆VPRECH_L
VREG – VBATT
Charge Termination Detection
Termination Current Ratio(default)
ITERM
VBATT=4.2V
Logic Input/Output
______________
PGOOD Pull Down Voltage
Logic-High
Voltage
______
EN Threshold
Logic-Low
Voltage
______
EN Pin Input Current
VCHG_S
TBD, ICHG_S=5mA
VPGOOD
TBD, IPGOOD=5mA
_________________
C HG_ S Pull Down Voltage
IEN
IEN=2V
--
--
2
--
125
--
mV
μA
Protection
Thermal Regulation
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℃
Page 7 of 11
Preliminary Datasheet
LP28007
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. Functional operation of the device at these or any other conditions beyond
those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may remain possibility to affect device reliability.
Note 2. θJA
Is measured in the natural convection at TA=25℃ on a high effective thermal conductivity test
board 4 layers,1S of JEDEC 51-7 thermal measurement standard. The case point of θJc is on the
expose pad for the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
VSET VS. Temperature (VBATT > 5.8V)
VSET VS. Temperature (VBATT < 5.8V)
Charge Current VS.Battery Voltage(VIN=10V)
Charge Current VS.VIN(VBATT=8.0V)
Rset=3k
Regulated Output Voltage vs.Supply Voltage
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Regulated Output Voltage vs.Temperature
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Preliminary Datasheet
LP28007
Application Information
Automatically Power Source Selection
Battery Voltage Regulation
The LP28007 is a battery charger IC which is designed
The LP28007 monitors the battery voltage through the
for Li-ion Battery with 4.2V rated voltage.
BATT pin. Once the battery voltage level closes to the
ACIN Mode : When the ACIN input voltage is higher
VREG threshold, the LP28007 voltage enters constant
than the UVP voltage level (4.4V), the LP28007 will
phase and the charging current begins to taper down.
turn on ACINP-MOSFET. Sleep Mode : The LP28007
When battery voltage is over the VREG threshold, the
will enter Sleep Mode when ACIN input voltage are
LP28007 will stop charge and keep to monitor the
removed. This feature provides low leakage current
battery voltage. However, when the battery voltage
from the battery during the absence of input supply.
decreases 100mV below the VREG, it will be
recharged to keep the battery voltage. Charge Status
Fast-Charge Current Setting
Outputs. The open-drain CHG_S and PGOOD outputs
The LP28007 offers ISETA pin to determine the ACIN
indicate various charger operations as shown in the
charge rate from 100mA to 1200mA. The charge
following table. These status pins can be used to drive
current can be calculated as following equation.
LEDs or communicate to the host processor. Note that
ON indicates the open-drain transistor is turned on and
LED is bright.
Pre- Charge Current Setting
During a charge cycle if the battery voltage is below
the VPRECH threshold, the LP28007 applies a
Temperature Regulation and Thermal Protection
pre-charge mode to the battery. This feature revives
In order to maximize the charge rate, the LP28007
deeply discharged cell sand protects battery life. The
features a junction temperature regulation loop. If the
LP28007 internal determines the pre-charge rate as
power dissipation of the IC results in a junction
10% of the fast-charge current.
temperature greater than the thermal regulation
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Preliminary Datasheet
LP28007
threshold (125°C), theLP28007 throttles back on the
Layout Consideration
charge current in order to maintain a junction
The LP28007 is a fully integrated low cost single-cell
temperature around the thermal regulation threshold
Li-Ion battery charger ideal for portable applications.
(125°C).
Careful
The
LP28007
monitors
the
junction
PCB
layout
is
necessary.
For
best
temperature, TJ, of the die and disconnects the battery
performance, place all peripheral components as close
from the input if TJ exceeds 125°C. This operation
to the IC as possible. A short connection is highly
continues until junction temperature falls below
recommended. The following guide lines should be
thermal regulation threshold (125°C) by the hysteresis
strictly followed when designing a PCB layout for the
level. This feature prevents the chip from damage.
LP28007.Input capacitor should be placed close to IC
and connected to ground plane.
Selecting the Input and Output Capacitors
The trace of input in the PCB should be placed far
In most applications, the most important is the
away the sensitive devices or shielded by the ground.
high-frequency decoupling capacitor on the input of
The GND should be connected to a strong ground
the LP28007.A 1uF ceramic capacitor, placed in close
plane for heat sinking and noise protection. The
proximity to input pin and GND pin is recommended. In
connection of RSETA should be isolated from other
some applications depending on the power supply
noisy traces.
characteristics and cable length, it may be necessary
The short wire is recommended to prevent EMI and
to add an additional 10uFceramic capacitor to the
noise coupling.
input.
Output capacitor should be placed close to IC and
The LP28007 requires a small output capacitor for
connected to ground plane to reduce noise coupling.
loop stability. A 1uF ceramic capacitor placed between
When PCB has poor layout, the 10uF is recommended
the BATT pin and GND is typically sufficient.
to prevent noise.
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Preliminary Datasheet
LP28007
Packaging Information
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