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零件编号 | SL1053 | ||
描述 | Advanced Lithium-Ion Linear Battery Charger | ||
制造商 | SiL | ||
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1 Page
SL1053
Advanced Lithium-Ion Linear Battery Charger
General Description
SL1053 is a single Lithium-Ion or Lithium-Polymer cell linear battery charger which is
designed for compact and cost-sensitive handheld devices. It combines charge status indication,
charge termination, battery temperature monitoring, and high accuracy current and voltage
regulation in a SOP-8 package.
SL1053 charges the battery in three modes, precharge, constant current, constant voltage. If
the battery voltage is below the precharge threshold VO(MIN), the SL1053 precharges the battery
with a lower conditioning current. After precharge, the SL1053 applies a constant current to the
battery. An external sense-resister sets the charge current. The constant voltage mode continues
until the battery reaches the regulation
The battery temperature is continuously measured by an external thermistor through the TS
pin. SL1053 inhibits charge until the temperature is within the range defined by users.
Features
For Single Lithium-Ion or Lithium-Polymer Cell Battery Pack 4.2V
A Few External Components are Required
Precharge, Constant Current, Constant Voltage Modes
Battery Temperature Monitor
Charge Status Indication
Automatic Battery Recharge
Charge Termination Detect
Auto Low Power Sleep Mode when VDD Power is removed
MSOP-8 Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Digital Cameras
PDAs
Cellular Phones
Information Appliance
Pin Configurations
1
SL1053
Charge status indication
The SL1053 indicates the status of the charger on the 3-state STAT1 and STAT2 pin. The
following table shows the statuses of this pin.
Condition
STAT1 Pin
STAT2 Pin
In batter charging cycle
High
Low
Charge cycle completed
Low
High
Temperature fault or charge High Impedance
High Impedance
function disable or output
shorted
Selecting an External PNP Pass-Transistor or P-Channel MOSFET:
The SL1053 drives an external PNP transistor or P-Channel MOSFET to control the charging
current. The specifications must be concerned are the voltage and current rating and package
power dissipation. The external switch is performed as a linear regulator. The maximum power
loss occurs when the constant current regulation starts at the beginning, and it can be calculated
approximately from following equation:
PD(MAX) =I(SNS)×(VDD -0.1V -2.8V)
I(SNS) is the constant regulation current.
The minimum voltage drop between the sense-resistor is 100mV, and the minimum precharge
threshold voltage is 2.8V.
The external pass device with PCB heatsinking must be rated for the maximum power dissipation.
Selecting Input/Output Capacitor
In analog circuit applications, to place a high-frequency decoupling capacitor nearby the controller
IC between input power source and ground is very important. A 0.1uF ceramic is recommended. If
a high ripple and noise input power is chosen, it should have enough capacitance to reduce the
disturbance.
A 0.1uF to 1uF output capacitor is recommended to control the output voltage and keep the output
voltage ripple small when the battery is disconnected
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页数 | 9 页 | ||
下载 | [ SL1053.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
SL1051 | Precision linear battery charger control circuit | SiliconLake |
SL1052 | Precision linear battery charger control circuit | SiliconLake |
SL1053 | Advanced Linear Li-ion battery charger controller | SiliconLake |
SL1053 | Advanced Lithium-Ion Linear Battery Charger | SiL |
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