LX2201 datasheet(2/11 Pages) MICROSEMI

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LX2201

PRODUCTION DATA SHEET

Microsemi

Integrated Products Division

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

Page 2

Rev. 1.2b, 2005-04-13

USB Li-Ion Battery Charger

ABSOLUTE MAXI MUM RATI NGS

Supply Voltage (VIN)..........................................................................-0.3V to 7V

Analog Input Signals (VIDx, VM, SNS) .............................................-0.3V to 7V

Battery Charging Current (IBAT).........................................................................2A

Discharge Current (IVDD)....................................................................................3A

Operating Junction Temperature.................................................................. 150

°C

Storage Temperature Range...........................................................-65

°C to 150°C

Peak Package Solder Reflow Temp. (40 second max. exposure) ... 260°C (+0, -5)

VIN Maximum DC Current..........................................................................500mA

VIN Maximum Surge Current.............................................................................2A

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

TH ERM A L DATA

LQ Plastic Micro Lead Frame Quad Package 20-Pin

THERMAL RESISTANCE

-JUNCTION TO AMBIENT,

θJA

°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.

PACKAGE PI N OUT

VDD

VIN

CMP

BAT

Pad Is GND

LQ PACKAGE

(Top View)

N.C. – No Internal Connection

RoHS / Pb-free 100% Matte Tin Lead Finish

FUNCTIONAL PIN DESCRIPTION

Name

Description

BAT

Charging Output - This pin is wired to the positive terminal of the battery. (The negative battery terminal is wired to GND.)

CCP

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

determined by the following relationship:

BAT(MAX)

65000

RCP

CMP

Compensation Pin – Connect a 0.1uF compensation capacitor from this pin to VDD.

CTP

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

current is determined by the following relationship:

BAT(MIN)

7500

RTP

CUS

Maximum VIN Current Programming Pin – A resistor (RUS) is connected between this pin and GND. The Hi Level charge

current is determined by the following relationship:

IN(HI))

1211

RUS

GND

Common Ground

Not Connected. This pin is connected internally and should be left floating.

PSW

PMOS Switch driver – This output is designed to drive the gate of an external PMOS power switch. The driver is pulled low

(PMOS on state) when VDD > VBAT.

VDD

Common Power Node – Connects to system power bus.

VIDx

State Select Input – Applying a two bit TTL compatible signal sets the desired state of the charger corresponding to the Truth

Table.

VIN

Voltage Input – Current limited USB input. Apply a USB compliant power input.

Voltage Mode Select - Selects the constant voltage. VM = Low to select 4.2V charge level. VM = High to select 4.1V charge

level.

STAT

Status - This pin is a logic high level when the battery is being charged. A low signal indicates either under voltage lockout,

charge completed, or VBAT > VDD, or VID0 = VID1 = 0.

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