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PDF PT6112EESO Data sheet ( Hoja de datos )
| Número de pieza | PT6112EESO | |
| Descripción | Standalone Linear Li-Ion Battery Charger | |
| Fabricantes | Powtech | |
| Logotipo |  |
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PT6112
Standalone Linear Li-Ion Battery
Charger with Thermal Regulation
GENERAL DESCRIPTION
The PT6112 is a highly integrated Li-ion battery linear
charging management device targeted at space limited
portable applications. The PT6112 offers an integrated
MOSFET and current sensor, reverse blocking
protection, high accuracy current and voltage regulation,
charge status indication, and charge termination in a
SOT23 or ESOP8 package. The PT6112 has low
external component count. The PT6112 charges a
battery in three phases: trickle charging, constant
current, and constant voltage. No external sense resistor
is needed, and no blocking diode is required due to the
internal MOSFET architecture. The thermal feedback
regulates the charging current to limit the chip
temperature during high power operation or high
ambient temperature to maximize the charge rate
without risk of overheating. The charge voltage is fixed
at 4.2V, and the charge current can be programmed
externally with a single resistor. The PT6112
automatically terminates the charge cycle when the
charge current drops to 1/10 the programmed value
after the final float voltage is reached. The PT6112
automatically re-starts the charge if the battery voltage
falls below an internal threshold.
ORDERING INFORMATION
FEATURES
z Charges Single Cell Li-Ion Batteries Directly from
USB Port
z Programmable Charge Current Up to 800mA
z No MOSFET, Sense Resistor or Blocking Diode
Required
z Complete Linear Charger in SOT23-5 or ESOP8
Package for Single Cell Lithium-Ion Batteries
z Constant-Current/Constant-Voltage Operation with
Thermal Regulation to Maximize Charge Rate Without
Risk of Overheating
z Preset 4.2V Charge Voltage with ±1% Accuracy
APPLICATIONS
z Cellular Telephones, PDAs, MP3 Players
z Bluetooth Applications
z Digital Cameras
z Charging Docks and Cradles
PACKAGE
SOT23-5
ESOP8
TEMPERATURE
RANGE
-40℃ to 85℃
-40℃ to 85℃
ORDERING PART
NUMBER
PT6112E23E
PT6112EESO
TRANSFER
MEDIA
Tape & Reel
Tape & Reel
MARKING
6112
PT6112
xxxxxX
TYPICAL APPLICATION CIRCUIT
KEY PERFORMANCE CHART
Complete Charging Cycle(900mAh Battery)
700 4.25
Constant current
600
Constant voltage
4.20
4.15
500
4.10
400 Charge terminated
4.05
300 4.00
200 3.95
100
VCC=5V,
RPROG=1.65K,
3.90
TA=25?
0
3.85
3.80
0 20 40 60 80 100 120
Time (Minutes)
China Resources Powtech (Shanghai) Limited
PT6112_DS Rev EN_1.0
WWW.CRPOWTECH.COM
Page 1
1 page  
SIMPLIFIED BLOCK DIAGRAM
120oC
TDIE
TA
SHDN
1 CHG
STANDBY
PT6112
Standalone Linear Li-Ion Battery
Charger with Thermal Regulation
4
VCC
1X
MA
1.5uA
1000X
BAT 3
R1
R3
1V
R4
0.1V
R5
R2
VREF
1.21V
BAT
2.9V
3uA
PROG
5
VCC
GND
2
OPERATION DESCRIPTION
The PT6112 is a standalone linear Li-ion battery
charger with thermal regulation. With the internal 0.6
ohms MOSFET, the minimum operating voltage can be
less than 4.25V. One external 1% precision resistor is
required to set the charging current value. When the
voltage at the VCC pin rises above the UVLO threshold,
the normal charging cycle begins. If the battery
voltage is less than 2.9V, the device will operate in a
trickle charging mode. The charging current in the
trickle charging mode is 1/10th of the programmed
value, which effectively protects the battery from
damage and prolongs its lifetime. When the voltage at
the BAT pin rises above 2.9V, the charger enters the
constant-current mode in which case the charging
current equals to the programmed value. Once the
voltage at the BAT pin reaches 4.2V, the charger goes
into the constant voltage mode where the charging
current decreases. Once the charging current drops to
1/10th the programmed value, the charging cycle ends.
After a charge cycle is complete and the charging
operation is terminated, the PT6112 keeps monitoring
the BAT voltage. It will recharge the battery as soon as
the BAT voltage drops below 4.05V. The PT6112
includes a soft-start circuit to minimize the inrush
current at the start of a charge cycle. When the PROG
pin is floating, the charger goes into the shutdown
mode. It acts as chip enable pin.
China Resources Powtech (Shanghai) Limited
PT6112_DS Rev EN_1.0
WWW.CRPOWTECH.COM
Page 5
5 Page 
PACKAGE INFORMATION
PT6112
Standalone Linear Li-Ion Battery
Charger with Thermal Regulation
SOT23-5
SYMBOL
A
A1
A2
A3
b
b1
c
c1
D
E
E1
e
e1
L
L1
L2
R
R1
θ
θ1
θ2
MIN
-
0
1.00
0.60
0.36
0.36
0.14
0.14
2.826
2.60
1.526
0.35
0.10
0.10
0°
3°
6°
MILLIMETERS
TYP
-
-
1.10
0.65
-
0.38
-
0.15
2.926
2.80
1.626
0.95BSC
1.90BSC
0.45
0.59REF
0.25BSC
-
-
-
5°
8°
MAX
1.25
0.15
1.20
0.70
0.50
0.45
0.20
0.16
3.026
3.00
1.726
0.60
-
0.25
8°
7°
10°
China Resources Powtech (Shanghai) Limited
PT6112_DS Rev EN_1.0
WWW.CRPOWTECH.COM
Page 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PT6112EESO.PDF ] | |
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