Datasheet LA9010 Datasheet (Inno)

Oct. 2

6

, 2013

Rev01

1A Linear Charger with Thermal Regulation for 1-cell/4.2V Li-Ion Battery

General Description

LA9010 is a linear charger for single cell Li-Ion battery. It provides maximum 1A charge current, and presets 4.2V charge voltage. The charge current can be programmed by an external resistor. The thermal regulation is build-in for limit maximum power to prevent overheating. LA9010 is well suited for portable devices due to the SOT-23-5 small package and few external components.

For 1-cell / 4.2V battery application, the input voltage range of LA9010 is from 4.25V to 5.5V that is specifically designed to meet USB power specifications. The supply current is only 100uA in standby mode, and under 45uA in shutdown.

This device consumes zero reverse current from the battery in shutdown and standby mode. No external blocking diode required. Other features of charge current monitor, under-voltage lockout, auto recharge, soft-start, and status indicator are also included.

LA9010

Features

Adjustable charge current up to 1A

ll

Preset 4.2V charge voltage with +/-1%

ll

4.25V to 5.5V Input for 1-cell 4.2V Battery

ll

45uA Shutdown Current

ll

2.9V Trickle Charge Threshold

ll

Auto Recharge

ll

Zero Reverse Current from Battery

ll

No External Blocking Diode Required

ll

Max. Power Limit by Thermal Regulation

ll

Charge Status Indicator

ll

C/10 Charge Termination

ll

Soft-Start

ll

Under Voltage Lockout

ll

SOT-23-5 Package

ll

Meet RoHS Standard

ll

Applications

Portable Device

ll

Wireless Handset

ll

Bluetooth Application

ll

Ordering Information

LA9010 1 2 3 4 1 (Package Type) => C: SOT-23

2 (Number of Pins) => D: 5pin 3 (Charge Voltage) => 42: 4.2V 4 (Special Feature) => Blank: N/A

Available Part Number

LA9010CD42

Marking Information

1 2 3 4

1 2 (Product Code)

LA9010CD42: S2

3 4 (Date Code)

For date code rule, please contact our sales representative directly.

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www.inno.com.tw

Oct. 2

6

, 2013

Rev01

Typical Application

LA9010

4.25V~5.5V

Charge Cycle

1uF

330

IN BAT

4

LA9010CD42

CHGB PROG

1

GND

3

480mA

5

2K

2

4.2V Li-Ion Battery

VIN=5V R

=2K (Charge Current=480mA)

PORG

Battery Capability=890mA/h

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www.inno.com.tw

Oct. 2

6

, 2013

Rev01

Functional Block Diagram

2.9V

BAT

CHGB

GND

-

+

Logic

Control

UVLO

Thermal

Control

LA9010

IN

Regulation

Control

+

-

1.18V

+

-

BAT

PROG

Pin Configurations

Pin No. Name Description

This pin is an open-drain output for status indicator. The internal MOSFET

1 CHGB

2 GND

3 BAT

4 IN

pulls-down to ground when battery is charging. After charge cycle is completed, this pin pulls-down with 24uA weak current. When the under voltage lockout is triggered, LA9010 forces this pin to high-impedance.

Connect this pin to the circuit ground.

Charge current output and voltage feedback. It provides charge current to battery, and regulates the final float voltage to 4.2V. The internal voltage divider is disconnected in shutdown and standby mode.

Supply voltage input. Connect at least 1uF capacitor to ground. The input voltage range is from V LA9010 enters shutdown mode and drops I

45

SOT-23-5

1 32

+0.5V to 5.5V. When VIN drops to V

BAT

to less than 1uA.

BAT

+0.03V,

BAT

5 PROG

Charge current programming and shutdown pin. Connect this pin to ground with an 1% resistor to set the charge current by the following formula:

I

= (V

BAT

Disconnect R

PROG/RPROG

will pull V

PROG

) x 960 ; V

to 2.4V internally, and then LA9010 will

PROG

=1V in constant current mode

PROG

enter shutdown mode. Do not connect this pin to ground directly.

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LA9010

Oct. 2

6

, 2013

Rev01

Absolute Maximum Ratings

Parameter Rating

IN, BAT, and CHGB Voltage Range

PROG Voltage Range

-0.3V ~ 6V

-0.3V ~ VIN+0.3V

BAT Output Current

1A

Storage Temperature Range -65

Junction Temperature

o

C ~ 160oC

150 oC

Lead Soldering Temperature (5 sec)

These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground.

260 oC

Recommended Operating Conditions

Parameter Rating

Input Voltage Range

4.25V ~ 5.5V

Ambient Temperature Range

-40oC ~ 85oC

Junction Temperature Range

These are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions, please see the Electrical Specifications.

-40oC ~ 125oC

Package Information

Parameter Package Symbol Rating

Thermal Resistance (Junction to Case)

Thermal Resistance (Junction to Ambient)

SOT-23-5

θ

JC

θ

250

JA

110 oC/W

o

C/W

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LA9010

Oct. 2

6

, 2013

Rev01

Electrical Specifications

VIN=5V, TA=25ºC, unless otherwise noted.

Parameter Test Condition Min. Typ. Max. Units

Supply Current

Regulated Output (Float) Voltage

BAT Current

Trickle Charge Current V

Trickle Charge Threshold Voltage

Trickle Charge Hysteresis Voltage

Charge Mode ; (R

Standby Mode ; (Charge Terminated)

Shutdown Mode ; (PROG Floating, VIN<V

TA=0ºC ~85ºC 4.158 4.2 4.242 V

Current Mode ; (R

Standby Mode ; (V

Shutdown Mode ; (PROG Floating)

Sleep Mode ; (VIN=0V)

BAT<VTRICKLE

R

PROG

R

PROG

, R

=10K, V

=10K 0.2 V

BAT

=10K) 250 330 uA

PROG

100 150 uA

, VIN<V

BAT

PROG

BAT

=2K 20 50 75 mA

PROG

rising 2.8 2.9 3.0 V

)

UVLO

=2K) 447 480 513 mA

=4.2V) -1 0 1 uA

45 80 uA

-1 0 1 uA

Input UVLO

Input UVLO Hysteresis

VIN rising 2.45 3 3.75 V

0.2 V

V

Manual Shutdown Threshold

PROG Voltage

rising 1.25 V

PROG

R

=10K, Current Mode 0.93 1 1.07 V

PROG

Recharge Threshold Voltage

Thermal Regulation Constant Junction Temperature 120

V

FLOAT-VRECHARGE

0.16 V

MOSFET ON-Resistance

0.53 Ohm

Soft-Start Time

=0~(960/R

BAT

) 100 us

PROG

I

o

C

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www.inno.com.tw

Oct. 2

6

, 2013

Rev01

Evaluation Board Layout

LA9010

Evaluation Board Schematic

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www.inno.com.tw

Oct. 2

6

, 2013

Rev01

Package Outline

SOT-23-5

LA9010

D e1

(REF.)

L

E

E1

A

e

Symbol

A 0.900 1.250 0.036 0.050 A1 0.000 0.100 0.000 0.004 A2 0.900 1.150 0.041 0.045

b 0.300 0.400 0.012 0.016

C 0.100 0.200 0.004 0.008

D 2.820 3.020 0.111 0.119

E 2.650 2.950 0.104 0.116 E1 1.500 1.700 0.060 0.068

L 0.300 0.600 0.012 0.024

L1

e

e1

Z 0

Min. Max. Min. Max.

(TYP.)

b

A1 A2

Dimensions

Millimeters Inches

0.700 REF.

0.95 Bsc.

1.90 Bsc.

°

8

°

0.028 REF.

0.038 Bsc.

0.076 Bsc.

0

°

8

°

c (REF.)

Z

(REF.)

L1

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www.inno.com.tw

LA9010

Oct. 2

6

, 2013

Rev01

NOTICE

The specifications and product information of INNO-TECH Co., Ltd. are subject to change without any prior notice, and customer should contact INNO-TECH Co., Ltd. to obtain the latest relevant information before placing orders and verify that such information is current and complete. The information provided here is believed to be reliable and accurate; however INNO-TECH Co., Ltd. makes no guarantee for any errors that appear in this document.

LIFE SUPPORT POLICY

INNO-TECH products are not designed or authorized for use as critical components in life support devices or systems without the express written approval of the president of INNO-TECH Co., Ltd. As used herein:

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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