lx2208 Microsemi Corporation, lx2208 Datasheet - Page 2

• Manufacturer Part Number: lx2208
• Description: 2 Amp Three Level Lithium Ion Battery Charger
• Manufacturer: Microsemi Corporation

Copyright © 2007
Rev. 1.0, 2007-04-03
DC
Name
STAT
CMP
GND
TMP
Supply Input Voltage (IN, BAT) ...................................................................... -0.3V to 7V
All other pins ............................................................................................-0.3V to V
Battery Charging Current .............................................................................................2.5A
Operating Ambient Temperature Range (T
Maximum Operating Junction Temperature .............................................................. 150°C
Storage Temperature Range.........................................................................-65°C to 150°C
Lead Temperature (Soldering 10 seconds)................................................................. 300°C
Peak Temp. for Solder Reflow (40 seconds maximum exposure).................. 260°C (+0 -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
HCP
H/ L
20%
Junction Temperature Calculation: T
*The θ
the above assume no ambient airflow. See layout guidelines section for important details.
BAT
LCP
SD
IN
THERMAL RESISTANCE
OK
JA
Ground. Currents are positive into, negative out of specified terminal.
LD
numbers are guidelines for the thermal performance of the device/pc-board system. All of
Pin
12
10
11
2
4
7
8
1
9
5
3
6
TM
Output, Battery Connection – This pin is wired to the positive terminal of a single cell Lithium Ion/Polymer battery.
Input, Compensation – Connect a series combination of a 1k resistor and 0.47µF capacitor from IN to CMP.
Output, Power status logic pin and LED driver – This pin is an open drain output that can sink 10mA of current to
drive an external LED. This pin is low impedance to GND when the IN pin input voltage is high enough to charge
the battery.
Common Ground – Used as chip ground and as a reference for the battery return.
Input, High Current Programming and Termination Current Programming – A resistor (R
GND sets the constant current high level. The following relationship determines the charging current of constant
current mode: Typically I
current level, and the conditioning current is set to 1/20 of the HCP current level.
High or Low load select logic input – A logic high selects the constant charge current level set by the HCP pin
resistor R
Input Power – Connect to a wall adapter or a USB port.
Input, Low Current Programming – A resistor (R
level. The following relationship determines the charging current of constant current mode: Typically
I
Input, Shutdown – A logic high places the LX2208 in shut down mode; it can also be used for USB suspend
mode.
Output, Charging status logic pin and LED driver – This pin can source or sink 5mA of current to drive an external
LED in either output state. This pin is low when the battery is in charging mode and becomes high when the
charge cycle is finished. It becomes high impedance when the input power is removed.
Input, Battery Temperature Monitor – This sense pin determines the battery temperature. It is connected to a
resistor network as defined in the application note. When the TMP pin falls below 29% (typ) of V
74% (typ) of V
constant charge current level set by the LCP pin resistor R
current level set by the LCP pin resistor R
20% Select logic input – This pin is only monitored when the H/ L pin is low. A logic high on 20% pin selects the
BAT
A B S O L U T E M A X I M U M R A T I N G S
=7150/R
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Plastic Micro Leadframe Package 12-Pin
HCP
-
JUNCTION TO
LCP
T H E R M A L D A T A
and a logic low selects the constant charge current level set by the LCP pin resistor R
IN
J
= T
when H/ L is low and 20% is high.
it suspends charging. Ground the TMP pin if it is not used.
A
+ (P
D
A
F U N C T I O N A L P I N D E S C R I P T I O N
) ..................................................-40 to 125°C
x θ
BAT
A
JA
MBIENT
=7150/R
).
Analog Mixed Signal Group
, θ
HCP
Microsemi
JA
®
when H/ L is high. The termination current is set to 1/10 of the HCP
LCP
.
2 Amp Three Level Lithium Ion Battery Charger
LCP
Description
) between this pin and GND sets the constant current low
33°C/W*
LCP.
SUPPLY
P
A logic low selects 20% of the constant charge
RODUCTION
DC OK
STAT
CMP
RoHS / Pb-free 100% matte Tin Pin Finish
D
20%
SD
IN
ATA
P A C K A G E P I N O U T
S
1
2
3
4
5
6
HEET
HCP
LD Package
(Top View)
) between this pin and
IN
LX2208
or rises above
LCP
.
12
11
10
9
8
7
Page 2
BAT
TMP
HCP
LCP
H/L
GND