LX2205
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 2007
Rev. 1.0a, 2007-03-02
WWW.Microsemi .COM
1A Li-Ion Battery Charger with Power Source Management
TM
®
L
L
X
X
2
2
2
2
0
0
5
5
ABSOLUTE MAXIMUM RATINGS
Supply Voltages (MDC, SYS, USB) ................................................................ -0.3V to 7V
Battery Voltage (BAT) ..................................................................................... -0.3V to 6V
All Other Pins ............................................................................................. -0.3V to V
SUPPLY
USB Current .............................................................................................................600mA
BAT Discharge Current ................................................................................................1.6A
Operating Ambient Temperature Range (T
A
) ..............................................-45°C to 125°C
Maximum Operating Junction Temperature (T
J
) ....................................................... 150°C
Storage Temperature Range.........................................................................-65°C to 150°C
Lead Temperature (Soldering 10 seconds)................................................................. 300°C
Package 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
ground. Currents are positive into, negative out of specified terminal
.
THERMAL DATA
LQ
Plastic 4 x 4mm 16-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ
JA
28°C/W*
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x θ
JA
).
*The θ
JA
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow. See layout guidelines section for important details.
PACKAGE PIN OUT
CMP
BAT
SYS
USB
MDC
SHDN
SUSP
UCL
CUS
GND
CCP
CTP
DC OK
CHG
DONE
TFB
1
2
3
4
5678
9
10
11
12
13141516
Connect Bottom
Pad to GND
LQ PACKAGE
(Top View)
RoHS / Pb-free 100% Matte Tin Pin Finish
FUNCTIONAL PIN DESCRIPTION
Name Pin Description
BAT 2 Battery Connection - This pin is wired to the positive terminal of a single cell lithium ion/polymer battery.
CCP 11
Charge Current Programming Pin - A resistor (R
CCP
) is connected between this pin and GND. The constant
charging current is determined by the following relationship: R
CCP
= 50.648 x I
CCL
-1.0855
with R
CCP
in kΩ and I
CCP
in amps.
CHG
14
Charge Indicator - This pin is a logic low level when the battery is being charged, provided V
SYS
is ≥ 4.4V. It is
capable of driving the series combination of an LED and resistor that is powered from the SYS pin.
CMP 1 Compensation – Connect a 0.1µF capacitor from CMP to SYS.
CTP 12
Charge Termination Programming Pin – A resistor (R
CTP
) is connected between this pin and GND. The
charge termination taper current is determined by the following relationship: R
CTP
=0.7354 x I
TERM
-1.0876
with R
CTP
in kΩ and I
TERM
in amps.
CUS 9
USB Current Limit Programming Pin – A resistor (R
CUS
) is connected between this pin and GND. The high
level USB charge current is determined by the following relationship: I
USB
= 1050 / R
CUS.
OK DC
13
Main DC Present – A low level on this logic output indicates that the Main DC power source (typically the wall
adapter) is applied.
DONE
15
Done Indicator - This pin is a logic low level when the battery charge cycle is complete. It is capable of driving
the series combination of an LED and resistor that is powered from the SYS pin.
GND 10 Common Ground – Used as chip ground and as a reference for the battery return.
