POWER LP28009 Internal integrate p-mosfet Datasheet

Preliminary Datasheet
LP28009
Single and Dual Cell Li+ Battery Charger IC –LP28009
General Description
Features
The LP28009 is a fully integrated low cost single-cell
and dual cell Li-Ion battery charger IC ideal for
portable applications. The LP28009 is capable of
being powered up from AC adapter. The LP28009
enters sleep mode when AC adapter is removed. The
LP28009 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 1.2A with
an external resister. The internal thermal feedback
circuitry regulates the die temperature to optimize the
charge rate for all ambient temperatures. The
LP28009 features 18V maximum rating voltages for
AC adapter. The other features are under voltage
protection, over voltage protection for AC adapter
supply and battery temperature monitoring.

18V Maximum Rating for AC Adapter

Internal Integrate P-MOSFETs

AC Adapter Power Good Status Indicator

Charge Status Indicator

Under Voltage Protection

Over Voltage Protection

Automatic Recharge Feature

Battery Temperature Monitoring

Small 8-Lead SOP(EP) Package

Thermal Feedback Optimizing Charge Rate

ROHS Compliant and 100% Lead (Pb)-Free
Marking Information
Device
Marking
LP28009
Package
Shipping
SP:SOP-8
3K/REEL
Order Information
LP28009 □ □
□ □
□
F: Pb-Free
Package Type
Typical Application Circuit
VIN
1
SP: SOP-8(EP)
RED
Output Voltage
2
3
4
42: 4.2V
10uF
9
84: 8.4V
ACIN
CHRG_S
BATT
NC
8
7
10uF
PGOOD
GND
GND
ISETA
EN
5
BATTERY
6
LP28009-42SPF
I/O CTRL
Q1
LPM9013
Applications

Portable Media Players/MP3 players



Cellular and Smart mobile phone
PDA/DSC
Bluetooth Applications
VIN
1
RED
2
3
4
10uF
9
ACIN
CHRG_S
BATT
NC
8
7
10uF
PGOOD
GND
ISETA
GND
EN
BATT
5
6
LP28009-84SPF
I/O CTRL
Q8
LPM9013
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Page 1 of 12
Preliminary Datasheet
LP28009
Functional Pin Description
P ac k age T y pe
P in C onf ig ur ati ons
ACIN 1
8 BATT
CHG_S 2
ESOP- 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 tion
1
AC I N
2
C H G_ S
C har ge Status Indic ator O utput(O pen Dr ain) .
3
PG O OD
Pow er G ood Indic ator O utput( O pen dr ain) .
4
GND
5
I SET A
6
EN
C har ge E nable Input( ac tiv e low ) .
7
NC
N o I nter nal C onnec tion.
Wall Ad aptor C har ge Input Supply .
G r ound.
Wall Adaptor s upply c har ge c urr ent Set point.
Bat t er y C har ge C ur r ent O utput.
T his pin pr ov ides c har ge c ur r ent to the battery and
8
BAT T
r egulates the final float v oltage to 4.2 or 8.4V. An
int er nal pr ec is ion r es istor div ider fr om this pin s ets the
f loat v oltage w hic h is disc onnec ted i n s hutdow n mode.
9
( Ex pos ed
Ex pos ed Pad Should be s older ed to PC B Boar d and
PG N D
C onnec ted to G N D .
Pad)
Note: LP28009-42SPF and LP28009-84SPF of
LP28009 – 02
May.-2013
Battery (Pin8) is output pin, the pin connector to Battery.
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Page 2 of 12
Preliminary Datasheet
LP28009
Function Block Diagram
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Preliminary Datasheet
LP28009
LP28009-42 Flow Chart
LP28009
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Preliminary Datasheet
LP28009
Absolute Maximum Ratings
VIN, VBATT, VCHGSB, VPGOOD, VEN
---------------------------------------------------------------------
-0.3V to 15V
Storage Temperature Range------------------------------------------------------------------------------------ -65℃ to 150℃
VISETA
---------------------------------------------------------------------------------------------------------------
-0.3V to 3.6V
Junction Temperat ure (TJ) ---- ---------------- ----------------- ------------ ------------------------ ---- 150℃
Lead Temperature (soldering,10 sec.) --------------------------------------------------------------------------------------
260℃
Operating Ratings
Supply Voltage
--------------------------------------------------------------------------------------------------------------- 9V to 13.5V
Thermal Resistance(θJA) ------------------------------------------------------------------------------------------------------- 46℃/W
Operating Temperature Range
-------------------------------------------------------------------------------------- -40℃ to 85℃
Electrical Characteristics
(TA=25℃, VIN=10V; unless otherwise specified.)
Symbol
VIN
Icc
Parameter
Input
Operating
Conditions
Voltage
Range
Input Supply Current
Min
Typ
Max
Units
9
10
13.5
V
Charge Mode.RSET=30K
300
uA
Standby Mode (Charge Terminated)
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
ITRICKLE
VTRICKLE
VTRHYS
VMSD
VASD
LP28009 – 02
BATT Pin Current
Trickle Charge Current
Trickle Charge Threshold
8.484
V
500
mA
1000
mA
Standby Mode, VBATT=8.4V
-1
0
1
uA
Shutdown Mode
-1
0
1
uA
Sleep Mode, VIN=0V
-1
0
1
uA
VBATT
<VTRICKLE, RSET=1.5K
60
mA
VBATT
<VTRICKLE, RSET=0.75K
120
mA
5.8
V
250
mV
RSET=1.5K, VBATT Rising
Voltage
Trickle Charge Hysteresls
8.4
RSET=1.5K
Voltage
ISETA
Pin Rising
2.15
V
Threshold Voltage
ISETA
Pin Falling
2.05
V
VIN – VBATT Lockout
Vin from High to Low
30
mV
Manual
May.-2013
Shutdown
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Preliminary Datasheet
Threshold Voltage
Vin from Low to High
60
mV
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
25
uA
0.35
V
0.35
V
C/10Termination
ITERM
VSET
ICHG_SB
VCHG_SB
VPGOOD
LP28009
CHG_SB
Current
Pin
Weak
VCHG_SB=5.0V
Pull-Down 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
--
%
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
______________
C H G _ S Pull Down Voltage
VCHG_S
TBD, ICHG_S=5mA
PGOOD Pull Down Voltage
VPGOOD
TBD, IPGOOD=5mA
_________________
Logic-High
Voltage
______
E N Threshold
Logic-Low
Voltage
______
E N Pin Input Current
--
65
--
mV
--
220
--
mV
VIH
1.5
--
--
V
VIL
--
--
0.4
V
IEN
IEN=2V
--
--
2
μA
Protection
Thermal Regulation
Internal Default
OVP SET
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--
125
--
℃
--
6.5
--
V
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Preliminary Datasheet
Parameter
Symbol
Test Conditions
LP28009
Min
Typ
Max
Units
4.4
4.5
V
80
120
mV
Supply Input
ACIN UVP Rising Threshold Voltage
VUV_HIGH
ACIN UVP Hysteresis
VUV_LOW
ACIN Standby Current
ISTBY
VBATT=4.5V
300
500
μA
ACIN Shutdown Current
ISHDN
VEN=HIGH
50
100
μA
150
250
μA
2
5
4.2
4.242
50
VACIN=4V,
ACIN UVP Current
IUVP
VUSB=4V,
VBATT=3V
VACIN=4V,
BATT Sleep Leakage Current
ISLEEP
VUSB=4V,
μA
VBATT=4.5V
Voltage Regulation
BATT Regulation Voltage
VREG
IBATT=60mA
-1
Regulation Voltage Accuracy
ACIN MOSFET
4.158
RDS(ON)_ACIN
+1
IBATT=500mA
600
V
%
mΩ
Current Regulation
ISETA Set Voltage
(Fast Charge Phase)
VISETA
Full Charge Setting Range
ICHG_AC
ACIN Charge Current Accuracy
ICHG_AC
LP28009 – 02
May.-2013
VBATT=3.5V
2.45
100
VBATT=3.8V
RISET=1.5KΩ
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--
2.5
-125
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2.55
V
1200
mA
--
℃
Page 7 of 12
Preliminary Datasheet
LP28009
Typical Operating Characteristics
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Preliminary Datasheet
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LP28009
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Preliminary Datasheet
LP28009
Application Information
Automatically Power Source Selection
The LP28009 is a battery charger IC which is designed
for Li-ion Battery with 4.2V rated voltage.
ACIN Mode : When the ACIN input voltage is higher
than the UVP voltage level (4.4V), the LP28009 will
turn on ACINP-MOSFET. Sleep Mode : The LP28009
will enter Sleep Mode when ACIN input voltage are
removed. This feature provides low leakage current
from the battery during the absence of input supply.
ACIN Over Voltage Protection
The ACIN input voltage is monitored by an internal
Pre- Charge Current Setting
OVP comparator. The comparator has an accurate
During a charge cycle if the battery voltage is below
reference of 2.5V from the band-gap reference. The
the VPRECH threshold, the LP28009 applies a
OVP threshold is set by the internal resistive. The
pre-charge mode to the battery. This feature revives
protection threshold is set to 6.5V. When the input
deeply discharged cell sand protects battery life. The
voltage exceeds the threshold, the comparator outputs
LP28009 internal determines the pre-charge rate as
a logic signal to turn off the power P-MOSFET to
10% of the fast-charge current.
prevent the high input voltage from damaging the
electronics in the handheld system. When the input
Battery Voltage Regulation
over voltage condition is removed (ACIN < 6V), the
The LP28009 monitors the battery voltage through the
comparator re-enables the output by running through
BATT pin. Once the battery voltage level closes to the
the soft-start.
VREG threshold, the LP28009 voltage enters constant
phase and the charging current begins to taper down.
Fast-Charge Current Setting
When battery voltage is over the VREG threshold, the
The LP28009 offers ISETA pin to determine the ACIN
LP28009 will stop charge and keep to monitor the
charge rate from 100mA to 1.2A. The charge current
battery voltage. However, when the battery voltage
can be calculated as following equation.
decreases 100mV below the VREG, it will be
recharged to keep the battery voltage. Charge Status
Outputs. The open-drain CHG_S and PGOOD outputs
indicate various charger operations as shown in the
following table. These status pins can be used to drive
LEDs or communicate to the host processor. Note that
ON indicates the open-drain transistor is turned on and
LED is bright.
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Preliminary Datasheet
LP28009
the BATT pin and GND is typically sufficient.
Layout Consideration
The LP28009 is a fully integrated low cost single-cell
Temperature Regulation and Thermal Protection
Li-Ion battery charger ideal for portable applications.
In order to maximize the charge rate, the LP28009
Careful
features a junction temperature regulation loop. If the
performance, place all peripheral components as close
power dissipation of the IC results in a junction
to the IC as possible. A short connection is highly
temperature greater than the thermal regulation
recommended. The following guide lines should be
threshold (125°C), theLP28009 throttles back on the
strictly followed when designing a PCB layout for the
charge current in order to maintain a junction
LP28009.Input capacitor should be placed close to IC
temperature around the thermal regulation threshold
and connected to ground plane.
(125°C).
The
LP28009
monitors
the
PCB
layout
is
necessary.
For
best
junction
temperature, TJ, of the die and disconnects the battery
The trace of input in the PCB should be placed far
from the input if TJ exceeds 125°C. This operation
away the sensitive devices or shielded by the ground.
continues until junction temperature falls below
The GND should be connected to a strong ground
thermal regulation threshold (125°C) by the hysteresis
plane for heat sinking and noise protection. The
level. This feature prevents the chip from damage.
connection of RSETA should be isolated from other
noisy traces.
Selecting the Input and Output Capacitors
The short wire is recommended to prevent EMI and
In most applications, the most important is the
noise coupling.
high-frequency decoupling capacitor on the input of
Output capacitor should be placed close to IC and
the LP28009.A 1uF ceramic capacitor, placed in close
connected to ground plane to reduce noise coupling.
proximity to input pin and GND pin is recommended. In
When PCB has poor layout, the 10uF is recommended
some applications depending on the power supply
to prevent noise.
characteristics and cable length, it may be necessary
to add an additional 10uFceramic capacitor to the
input.
The LP28009 requires a small output capacitor for
loop stability. A 1uF ceramic capacitor placed between
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Preliminary Datasheet
LP28009
Packaging Information
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Page 12 of 12
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