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CN3062 の電気的特性と機能

CN3062のメーカーはConsonanceです、この部品の機能は「600mA USB-Compatible Lithium Battery Charger」です。


製品の詳細 ( Datasheet PDF )

部品番号 CN3062
部品説明 600mA USB-Compatible Lithium Battery Charger
メーカ Consonance
ロゴ Consonance ロゴ 




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CN3062 Datasheet, CN3062 PDF,ピン配置, 機能
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CONSONANCE
600mA USB-Compatible Lithium Battery Charger
CN3062
General Description:
The CN3062 is a complete constant-current /constant
voltage linear charger for single cell lithium
rechargeable battery. The device contains an on-chip
power MOSFET and eliminates the need for the
external current sense resistor and blocking diode.
Furthermore, the CN3062 is specifically designed to
work within USB power specifications. Its low
external component count makes CN3062 ideally
suited for portable applications.
Thermal feedback regulates the charge current to
limit the die temperature during high power
operation or high ambient temperature. The
regulation voltage is internally fixed at 4.2V, it can
also be adjusted with an external resistor. The charge
current can be programmed externally with a single
resistor. When the input supply (wall adapter or USB
supply) is removed, the CN3062 automatically enters
a low power sleep mode, dropping the battery drain
current to less than 3uA. Other features include
under-voltage lockout, automatic recharge, battery
temperature sensing and charging/termination
indicator.
The CN3062 is available in a thermally enhanced
8-pin SOP package.
Applications:
Mobile Phones
Digital Still Cameras
MP4 Players
Electronic Dictionary
Portable Devices
Variety Of Chargers
Features:
Charges Single Cell Li-Ion Batteries Directly
from USB Port or AC Adaptor
Input Voltage Range From 4.35V to 6V
On-chip Power MOSFET
No external Blocking Diode or Current Sense
Resistors Required
Constant Charge Voltage 4.2V, and also can be
adjustable by an external resistor
Precharge Conditioning for Reviving Deeply
Discharged Cells and Minimizing Heat
Dissipation During Initial Stage of Charge
Programmable Continuous Charge Current Up
to 600mA
Constant-Current/Constant-Voltage/Constant-
Temp Operation with Thermal Regulation to
Maximize Charge Rate Without Risk of
Overheating
Automatic Low-Power Sleep Mode When Input
Supply Voltage is Removed
Status Indication for LEDs or uP Interface
C/10 Charge Termination
Automatic Recharge
Battery Temperature Sensing
Available in SOP8 Package
Pb-free Available
Pin Assignment
www.consonance-elec.com
REV 1.1
1
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CN3062 pdf, ピン配列
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In Figure 2, the BAT pin’s voltage in constant voltage mode is given by the following equation:
Vbat 4.23.04×10-6×Rx
WhereVbat’s is in volt
Rx’s is in ohm
Block Diagram
Figure 3 Block Diagram
REV 1.1
3
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3Pages


CN3062 電子部品, 半導体
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Detailed Description
The CN3062 is a linear battery charger designed primarily for charging single cell lithium-ion batteries.
Featuring an internal P-channel power MOSFET, the charger uses a constant-current/constant-voltage to charge
the batteries. Continuous charge current can be programmed up to 600mA with an external resistor. No blocking
diode or current sense resistor is required. The open-drain output
and
indicates the charger’s
status. The internal thermal regulation circuit reduces the programmed charge current if the die temperature
attempts to rise above a preset value of approximate 115. This feature protects the CN3062 from excessive
temperature, and allows the user to push the limits of the power handling capability of a given circuit board
without risk of damaging the CN3062 or the external components. Another benefit of adopting thermal
regulation is that charge current can be set according to typical, not worst-case, ambient temperatures for a given
application with the assurance that the charger will automatically reduce the current in worst-case conditions.
The charge cycle begins when the voltage at the VIN pin rises above the UVLO level, a current set resistor is
connected from the ISET pin to ground. The
pin outputs a logic low to indicate that the charge cycle is
ongoing. At the beginning of the charge cycle, if the voltage at FB pin is below 3V, the charger is in precharge
mode to bring the cell voltage up to a safe level for charging. The charger goes into the fast charge constant
current mode once the voltage on the FB pin rises above 3V. In constant current mode, the charge current is set
by RISET. When the battery approaches the regulation voltage, the charge current begins to decrease as the
CN3062 enters the constant-voltage mode. When the current drops to charge termination threshold, the charge
cycle is terminated,
is pulled low by an internal switch and
pin assumes a high impedance state
to indicate that the charge cycle is terminated. The charge termination threshold is 10% of the current in constant
current mode. To restart the charge cycle, remove the input voltage and reapply it. The charge cycle can also be
automatically restarted if the FB pin voltage falls below the recharge threshold. The on-chip reference voltage,
error amplifier and the resistor divider provide regulation voltage with 1% accuracy which can meet the
requirement of lithium-ion and lithium polymer batteries. When the input voltage is not present, the charger goes
into a sleep mode, dropping battery drain current to less than 3uA. This greatly reduces the current drain on the
battery and increases the standby time. The charging profile is shown in the following figure:
Precharge Constant Current
Phase
Phase
Constant Voltage
Phase
4.2V
3V
Charge Current
Battery Voltage
Charge terminated
Figure 4 Charging Profile
REV 1.1
6
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