LX2205 データシートの表示（PDF） - Microsemi Corporation

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LX2205

1A Li-Ion Battery Charger with Power Source Management

Microsemi Corporation 

LX2205

® 1A Li-Ion Battery Charger with Power Source Management

TM

PRODUCTION DATA SHEET

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 VSUPPLY

USB Current .............................................................................................................600mA

BAT Discharge Current ................................................................................................1.6A

Operating Ambient Temperature Range (TA) ..............................................-45°C to 125°C

Maximum Operating Junction Temperature (TJ) ....................................................... 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, θJA

28°C/W*

Junction Temperature Calculation: TJ = TA + (PD x θJA).

*The θJA 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

16 15 14 13

CMP 1

12 CTP

BAT 2

11 CCP

SYS 3

USB 4

Connect Bottom

Pad to GND

10 GND

9 CUS

5678

LQ PACKAGE

(Top View)

RoHS / Pb-free 100% Matte Tin Pin Finish

Name Pin

BAT

2

CCP 11

CHG 14

CMP 1

CTP 12

CUS

9

DC OK 13

DONE 15

GND 10

FUNCTIONAL PIN DESCRIPTION

Description

Battery Connection - This pin is wired to the positive terminal of a single cell lithium ion/polymer battery.

Charge Current Programming Pin - A resistor (RCCP) is connected between this pin and GND. The constant

charging current is determined by the following relationship: RCCP = 50.648 x ICCL-1.0855

with RCCP in kΩ and ICCP in amps.

Charge Indicator - This pin is a logic low level when the battery is being charged, provided VSYS is ≥ 4.4V. It is

capable of driving the series combination of an LED and resistor that is powered from the SYS pin.

Compensation – Connect a 0.1µF capacitor from CMP to SYS.

Charge Termination Programming Pin – A resistor (RCTP) is connected between this pin and GND. The

charge termination taper current is determined by the following relationship: RCTP =0.7354 x ITERM -1.0876

with RCTP in kΩ and ITERM in amps.

USB Current Limit Programming Pin – A resistor (RCUS) is connected between this pin and GND. The high

level USB charge current is determined by the following relationship: IUSB = 1050 / RCUS.

Main DC Present – A low level on this logic output indicates that the Main DC power source (typically the wall

adapter) is applied.

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.

Common Ground – Used as chip ground and as a reference for the battery return.

Copyright © 2007

Rev. 1.0a, 2007-03-02

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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