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PDF APL3201 Data sheet ( Hoja de datos )
| Número de pieza | APL3201 | |
| Descripción | Li+ Battery Charger | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APL3201
Li+ Battery Charger with Thermal Regulation
Features
• Programmable Charge Current Up to 1A
• Charge Status Output Pins
• Soft-Start Limits Inrush Current
• 4.2V Charge Voltage with ±1% Accuracy
• Fixed 55mA Prequal Charge Current
• Thermal Limiting Simplifies Board Design
• External Thermistor Monitor
• Enable/Disable Control
• 3mm x 3mm DFN-10 Package (DFN3x3-10)
• Disable Charging When VIN > 6.4V
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• PDAs
• MP3 Players
• Cell Phones
• Wireless Appliances
General Description
The APL3201 is a constant-current/constant-voltage
linear charger for single cell Li+ batteries.
The APL3201 needs no external MOSFET or diodes, and
accepts input voltage up to 6.0V. The small packages
and low external component count make the APL3201
ideally suited for portable applications.
On-chip thermal limiting simplifies PC board layout and
allows optimum charging rate without the thermal limits
imposed by worst-case battery and input voltage. When
the APL3201 thermal limit is reached, the charger does
not shut down but simply reduces charging current.
Ambient or battery temperature can be monitored with
an external thermistor. When the temperature is out of
range, charging pauses.
Other features include the STAT1 and 2 outputs to indi-
cate four charge states, and the EN input, switches the
APL3201 on or off.
The APL3201 is available in 3mmx3mm DFN-10 package,
and operates over the -40°C to +85°C temperature range.
Simplified Application Circuit
Pin Configuration
INPUT
Voltage
VIN BATT
LI+
CELL
VIN 1
STAT1 2
ISET 3
GND 4
EN 5
EP
(Bottom)
10 BATT
9 BYP
8 STAT2
7 REF
6 THRM
DFN3x3-10
(Top View)
Note : EP should be connected to GND plane for better heat
dissipation
STAT1
BYP
STAT2
EN
REF
ISET
THRM
GND
NTC
THERMISTOR
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Mar., 2009
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APL3201
Typical Operating Characteristics
VIN Supply Current vs. VIN Input Voltage
4
VEN = 5V
3
VIN Supply Current vs. VIN Input Voltage
4
VEN = 0V
3
22
11
0
0123456
VIN Input Voltage (V)
Off-Battery Leakage Current vs.
VIN Input Voltage
10
7
VEN = 0V
8 VBATT =4.2V
6
4
2
0
01 2345 67
VIN Input Voltage (V)
Charge Current vs. Ambient Temperature
1200
1000
800
600
ICHG = set to 1A
VBATT = 3.9V
VIN =5V
400
200
0
-40 -20 0 20 40 60 80 100 120
Ambient Temperature (°C)
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Mar., 2009
5
0
01234567
VIN Input Voltage (V)
Off-Battery Leakage Current vs. BATT Voltage
8
VEN = 0V
VIN = 0V
6
4
2
0
01 23 45
BATT Voltage (V)
BATT Voltage vs. Junction Temperature
4.25
4.24
4.23
VIN = 5V
4.22
4.21
4.2
4.19
4.18
4.17
4.16
4.15
-40 -20 0 20 40 60 80 100 120 140
Junction Temperature (°C)
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APL3201
Applicaiton Information
STAT Pins
The STAT1 and STAT2 outputs indicate four charger
operations. These two pins can be used to drive LEDs or
communicate to the host processor. When status pins
are monitored by a processor, there should be a 10kΩ
pull-up resistor to connect each status pin and the VCC of
the processor; furthermore, when the status is viewed by
the LED, the LED with a current rating is less than 10mA
and a resistor should be selected to connect the LED in
series, so the current will be limited to the desired cur-
rent value. The resistor is calculated by the following
equation:
R2,3 = (VIN − VLED _ ON)
PD
In other words, the LED and resistor between the input
and each status pin shoule be in series.
Capacitor Selection
Typically, a 4.7µF ceramic capacitor is used to connect
from VIN to GND. For high charging current, it is recom-
mended to use a larger input bypass capacitance to re-
duce supply noise. There is a ceramic capacitor con-
necting from BATT to GND for proper stability. To work
well with most application, at least a 2.2µF X5R ceramic
capacitor is required.
where:
T =device junction temperature
J
TA= ambient temperature
PD=device power dissipation
The device power dissipation, P , is the function of the
D
charge rate and the voltage drop across the internal FET.
It can be calculated by the following equation:
( )PD = VIN − VBATT × ICHG
PCB Layout Consideration
The APL3201 is packaged in a thermally enhanced QFN
package. The package includes a thermal pad to provide
an effective thermal contact between the device and the
printed circuit board. Connecting the exposed pad to a
large copper ground plane on the backside of the circuit
board through several thermal vias for heatsinking is
recommended. Connecting the battery to BATT as close
to the device as possible provides accurate battery volt-
age sensing. All decoupling capacitors and filter capaci-
tors should be placed as close as possible to the device.
The high-current charge path into VIN and from the BATT
pin must be short and wide to minimize voltage drops.
Thermal Consideration
The APL3201 is available in a thermally enhanced QFN
package with an exposed pad. It is recommended to con-
nect the exposed pad to a large copper ground plane on
the backside of the circuit board through several thermal
vias for heatsinking. The exposed pad transfers heat away
from the device, allowing the APL3201 to charge the bat-
tery with maximum current while minimizing the increase
in die temperature.
The most common measure of package thermal perfor-
mance is thermal resistance measured from the device
junction to the air surrounding the package surface (θJA).
The θJA can be calculated by the following equation:
θJA = TJ − TA
PD
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Mar., 2009
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet APL3201.PDF ] | |
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