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Preliminary GB5305

Features Automatically identifies the polarity of the

battery

Constant-current / constant-voltage operation

Over-temperature protection

Typical current to 500mA (RSEN = 0.6Ω) Preset 4.2V charge voltage with ± 1%

accuracy

Short circuit protection

Low external component

Support 2-LED schemes

DIP-8 package

Applications Li battery chargers

Description The GB5305 is a complete constant-current /

constant-voltage linear charger for single-cell

lithium-ion battery. The DIP-8 package and low

external component count make the GB5305

well-suited for portable applications.

The GB5305 will automatically detect the polarity of

the inserted battery and charge the battery at the

correct polarity. The final charge voltage is fixed at

4.2V. The GB5305 automatically terminates the

charge cycle when the charge current drops to 30 ~

40mA after the final float voltage is reached.

The GB5305 also includes thermal feedback to limit

the chip temperature during high power operation or

high ambient temperature conditions.

GB5305 supports LED drivers, which will be

explained in detail in the application notes.

Ordering and Marking Information

DIP-8

GB5305

X X XXX Serial No.Code 2Code 1 Code 1 8 9 A B G H I J Year 2008 2009 2010 2011 2016 2017 2018 2019 Code 2 1 2 3 4 9 A B C Month Jan. Feb. Mar. Apr. Sep. Oct. Nov. Dec.

Advanced Li-Ion Battery Charger IC with Capacity Indicator

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Preliminary GB5305

Pin Configuration

Pin Description

Pin No. Name Function

1 COMP Compensation pin

2 OUT Photo diode connect pin for open-drain out of the Internal Op-Amps.

3 BAT+ Battery connect pin for charging current (BAT+/BAT- can be reversed)

4 GND Ground

5 VSEN Current sense pin for constant current setting

6 BAT- Battery connect pin for charging current (BAT+/BAT- can be reversed)

7 VCC Power supply pin

8 LEDO LED control pin for displaying battery status

Absolute Maximum Ratings

Supply voltage VCC -------------------------------------------------------------------------------------------------------- 7.0V

VSEN, COMP, LEDO ------------------------------------------------------------------------------------------------------ 5.5V

BAT+, BAT- Pin current ------------------------------------------------------------------------------------------------ ±600mA

LEDO current --------------------------------------------------------------------------------------------------------------- ±15mA

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Block Diagram

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Electrical characteristics (TJ = 25 °C, VCC = 5 V, unless otherwise specified)

Parameter Symbol Test condition Min. Typ. Max. Unit

Voltage operating range Vcc 2.7 5.5 V

Operating current ICC 350 600 µA

Charging final voltage VFLOAT 4.16 4.2 4.24 V

Current sense voltage VSEN 270 300 330 mV

Charging current IBAT RSEN = 0.6Ω 500 mA

LED driver/sink current ILEDO 10 mA

1. Specification referred to 0 °C < Ta < 70 °C

Typical Performance Characteristics

IBAT set

An external resistor is used to program the output current (600mA Maximum)

R

VI

SEN

BAT=

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Application Information

Detection Description Supply Condition Battery Condition Green LED Red LED

Disconnected Connected and VBAT>4.1V Bright Dark Battery detection

Disconnected Connected and VBAT<4.1V Dark Bright

Battery charge Connected Connected and IBAT>30mA Dark Bright

Battery full Connected Connected and IBAT<30mA Bright Dark

Battery unload Connected Disconnected Bright Dark

Battery shorted Shorted Dark Dark

LEDO

OUT

GN

D

BAT+

BAT-

VSEN

VC

C

COMP

RCCFLYBACK CIRCUIT

Battery

+

-

+

-USB

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Preliminary GB5305

Typical Application Circuit

Non-USB solution

GND

VCC

USB solution

GND

VCC

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Preliminary GB5305

Package Information

DIP-8

MILLIMETERS INCHES SYMBOL

MIN. MAX. MIN. MAX.

A 5.33 0.210

A1 0.38 0.015

A2 2.92 4.95 0.115 0.195

b 0.36 0.56 0.014 0.022

b2 1.14 1.78 0.045 0.070

c 0.20 0.35 0.008 0.014

D 9.01 10.16 0.355 0.400

D1 0.13 0.005

E 7.62 8.26 0.300 0.325

E1 6.10 7.11 0.240 0.280

e 2.54 BSC 0.100 BSC

eA 7.62 BSC 0.300 BSC

eB 10.92 0.430

L 2.92 3.81 0.115 0.150

Note: 1. Followed from JEDEC MS-001 BA.

2. Dimension D, D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not

exceed 10 mil.