|
|
PDF TP4054 Data sheet ( Hoja de datos )
| Número de pieza | TP4054 | |
| Descripción | Standalone Linear Li-lon Battery Charger | |
| Fabricantes | NanJing Top Power | |
| Logotipo |  |
|
1. TP4054 datasheet circuit  Hay una vista previa y un enlace de descarga de TP4054 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
TP4054 Standalone Linear Li-lon Battery Charger with Thermal
Regulation in SOT
DESCRIPTION
The TP4054 is a complete constant-current/constant-voltage linear charger for single cell
lithium-ion batteries. Its SOT package and low external component count make the TP4054
ideally suited for portable applications. Furthermore, the TP4054 can work within USB and wall
adapter.
No external sense resistor is needed, and no blocking diode is required due to the internal
PMOSFET architecture and have prevent to negative Charge Current Circuit. Thermal feedback
regulates the charge current to limit the die temperature during high power operation or high
ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be
programmed externally with a single resistor. The TP4054 automatically terminates the charge
cycle when the charge current drops to 1/10th the programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply) is removed, the TP4054 automatically enters
a low current state, dropping the battery drain current to less than 2uA. The TP4054 can be put
into shut down mode, reducing the supply current to 45uA. Other features include current monitor,
under voltage lockout, automatic recharge and a status pin to indicate charge termination and the
presence of an input voltage.
FEATURES
· Programmable Charge Current Up to
800mA
·No MOSFET, Sense Resistor or Blocking
Diode Required
· Complete Linear Charger in SOT23-5
Package for Single Cell Lithium-Ion
Batteries
·Constant-Current/Constant-Voltage
Operation with Thermal Regulation to
Maximize Charge Rate Without Risk of
Overheating
·Charges Single Cell Li-Ion Batteries Directly
Complete Charge Cycle (650mAh Battery)
from USB Port
·Preset 4.2V Charge Voltage with 1%
Accuracy
·Charge Current Monitor Output for Gas
Gauging
·Automatic Recharge
·Charge Status Output Pin
·C/10 Charge Termination
·45uA Supply Current in Shutdown
·2.9V Trickle Charge Threshold (TP4054)
·Soft-Start Limits Inrush Current
·Available in 5-Lead SOT-23 Package
APPLICATIONS
·Cellular Telephones, PDAs, MP3 Players
·Charging Docks and Cradles
·Blue tooth Applications
TYPICAL APPLICATION
600mA Single Cell Li-lon Charger
ABSOLUTE MAXIMUM RATINGS
·Input Supply Voltage(VCC)：-0.3V～10V
·PROG：-0.3V～VCC+0.3V
·BAT：-0.3V～7V
· CHRG：-0.3V～10V
·BAT Short-Circuit Duration：Continuous
·BAT Pin Current：800mA
·PROG Pin Current：800uA
·Maximum Junction Temperature：145℃
·Operating Ambient Temperature Range：-40
℃～85℃
·Storage Temp. Range：-65℃～125℃
·Lead Temp.(Soldering, 10sec)：260℃
2
1 page  
PIN FUNCTIONS
（Pin 1）：Open-Drain Charge Status
Output. When the battery is charging, the
pin is pulled low by an internal
N-channel MOSFET. When the charge cycle
is completed, a weak pull-down of
approximately 20µA is connected to the
pin, indicating an “AC present” condition.
When the TP4054 detects an under voltage
lockout condition,
is forced high
impedance.
GND（Pin 2）：Ground
BAT（Pin 3）：Charge Current Output. Provides
charge current to the battery and regulates the
final float voltage to 4.2V. An internal precision
resistor divider from this pin sets the float
voltage which is disconnected in shutdown
mode.
VCC（Pin 4）：Positive Input Supply Voltage.
Provides power to the charger. VCC can range
from 4V to 9V and should be bypassed with at
least a 1µF capacitor. When VCC drops to within
30mV
BLOCK DIAGRAM
of the BAT pin voltage, theTP4054 enters
shutdown mode, dropping IBAT to less than 2µA
PROG（Pin 5）：Charge Current Program,
Charge Current Monitor and Shutdown Pin.
The charge current is programmed by
connecting a 1% resistor, RPROG,to ground.
When charging in constant-current mode,
this pin servos to 1V.
The PROG pin can also be used to shut down
the charger. Disconnecting the program resistor
from ground allows a 2.5µA current to pull the
PROG pin high. When it reaches the 2.70V
shutdown threshold voltage, the charger enters
shutdown mode, charging stops and the input
supply current. drops to 45µA. Reconnecting
RPROG to ground will return the charger to
normal operation.
6
5 Page 
pull-down current of approximately 20mA
indicates that sufficient voltage is applied to
VCC to begin charging. When a discharged
battery is connected to the charger, the
constant current portion of the charge cycle
begins and the
pin pulls to ground. The
pin can sink up to 10mA to drive an LED
that indicates that a charge cycle is in progress.
When the battery is nearing full charge, the
charger enters the constant-voltage portion of
the charge cycle and the charge current begins
to drop. When the charge current drops below
1/10 of the programmed current, the charge
cycle ends and the strong pull-down is replaced
by the 20mA pull-down, indicating that the
charge cycle has ended. If the input voltage is
removed or drops below the undervoltage
lockout threshold, the
pin becomes high
impedance. Figure 5 shows that by using two
different value pull-up resistors, a
microprocessor can detect all three states from
this pin.
Figure 5. Using a Microprocessor to
Determine
State
To detect when the TP4054 is in charge mode,
force the digital output pin (OUT) high and
measure the voltage at the
pin. The
N-channel MOSFET will pull the pin voltage low
even with the 2k pull-up resistor. Once the
charge cycle terminates, the N-channel
MOSFET is turned off and a 20mA current
source is connected to the
pin. The IN
pin will then be pulled high by the 2k pull-up
resistor. To determine if there is a weak
pull-down current, the OUT pin should be
forced to a high impedance state. The weak
current source will pull the IN pin low through
the 800k resistor; if
is high impedance,
the IN pin will be pulled high, indicating that the
part is in a UVLO state.
Reverse Polarity Input Voltage Protection:
In some applications, protection from reverse
polarity voltage on VCC is desired. If the supply
voltage is high enough, a series blocking diode
can be used. In other cases, where the voltage
drop must be kept low a P-channel MOSFET
can be used (as shown in Figure 6).
Figure 6. Low Loss Input Reverse
Polarity Protection
USB and Wall Adapter Power:
The TP4054 allows charging from both a wall
adapter and a USB port. Figure 7 shows an
example of how to combine wall adapter and
USB power inputs. A P-channel MOSFET, MP1,
is used to prevent back conducting into the
USB port when a wall adapter is present and a
Schottky diode, D1, is used to prevent USB
power loss through the 1k pull-down resistor.
Typically a wall adapter can supply more
current than the 500mA-limited USB port.
Therefore, an N-channel MOSFET, MN1, and
an extra 10k program resistor are used to
increase the charge current to 600mA when the
wall adapter is present.
Figure 7.Combining Wall Adapter and
USB power
12
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TP4054.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TP4054 | Standalone Linear Li-lon Battery Charger | NanJing Top Power |
| TP4055 | 500mA Linear Li-Ion Battery Charger | NanJing Top Power |
| TP4056 | 1A Standalone Linear Li-lon Battery Charger | NanJing Top Power |
| TP4057 | 500mA Linear Li-Ion Battery Charger | NanJing Top Power |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |