LX2201CLQ Microsemi Analog Mixed Signal Group, LX2201CLQ Datasheet - Page 8

• Manufacturer Part Number: LX2201CLQ
• Description: IC CHARGER BATT USB LI-ION 20MLP
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of LX2201CLQ

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 4.5 V ~ 6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-MLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 2000
Rev. 1.3, 2006-02-09
G
Ion battery using two steps: a constant current step
followed by a constant voltage step. The basic charger
function uses the VDD pins as an input and BAT pins as
the output. The LX2201 charger has a programmable
maximum current (programmable by the resistor value
between pin CCP to GND) which is the maximum
charging current during the Constant Current Mode of the
charging profile. The low dropout of the pass element
allows the battery to be charged from a loosely regulated
power supply. In the Constant Voltage Mode, the battery
terminal voltage can be regulated to 4.1V or 4.2V by
strapping the VM pin to VDD or GND, respectively. The
charger will terminate constant voltage charging once the
current drops below the minimum current setting
(programmable by the resistor value between pin CTP to
GND).
thermal regulation loop that will throttle back the charging
current to prevent the internal die temperature from
exceeding 150ºC. This feature prevents damage to the
system board when the IC exceeds its thermal temperature.
C
deeply discharged and have a terminal voltage less than
60% of the constant voltage level. The conditioning current
is 5% of the CCP programmable constant current level
(except where it might be limited in the USB states). Once
the battery terminal voltage exceeds the 60% level, the full
constant current level is applied (unless charging current is
limited by one of the other charger control loops).
C
the LX2201 turns off the pass element once the battery has
been fully charged. The charge termination state occurs at
the end of constant voltage mode. The charge status
changes state when charging is completed.
URRENT
HARGE
ENERAL
The LX2201 is designed to charge a single cell Lithium
The LX2201 has an integrated thermostat with a linear
A conditioning current is applied to batteries that are
To increase system battery life and avoid float charging,
TM
T
D
C
ERMINATION
ESCRIPTION
HARGE
M
ODE
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
M
ODE
T H E O R Y O F O P E R A T I O N
Integrated Products Division
®
Microsemi
Not Recommended for New Design:
T
power remains applied, the LX2201 enters a Voltage
Monitoring mode. In this mode the LX2201 monitors the
battery terminal voltage and applies a top off charge if the
battery voltage drops by more than 3% of full scale. This
feature is especially important for charging systems in
equipment where usage is infrequent.
USB C
USB specifications – the Low Power Peripheral (100mA)
and High Power Peripherals (500mA). VID1 logic input
selects USB charge currents.
current flowing from the VIN terminal to the VDD
terminal; then it limits the VIN current by reducing the
current
Charge Limit circuit does not limit the input current and
only scales the charging current.
D
enable. The system load is connected to VDD. The input
power is connected to VDD through an internal diode.
When the input power is removed, the battery current
flows from V
the LX2201 in a discharge mode configuration with both
AC adapter and USB inputs. The USB input is diode
ORed to the VDD pin and uses a MOSFET to reduce the
diode drop across the ORing diode. The LX2201 provides
a signal “PSW” to control the MOSFET for charge and
discharge modes. When both AC and USB power are
applied the PSW signal is overridden by the AC adapter
diode and the MOSFET is turned off
OP
ISCHARGE
Once the charger has completed a charge cycle, if
The LX2201 is fully compliant with, and supports, the
In discharge mode, VID0 is, indicate discharge mode
O
FF
HARGE
USB Li-Ion Battery Charger
C
flowing from V
HARGE
M
P
M
ODE
RODUCTION
BAT
ODE
M
to VDD. The circuit of Figure 3 shows
ODE
DD
D
ATA
to V
The LX2201 senses the
S
BAT
HEET
.
Note: the USB
See the LX2202
LX2201
Page 8