Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion WSON 10 (3x2) Surface-mount

FEATURES

APPLICATIONS

DESCRIPTION

LDO

BAT

VBUS

GND

D+

D-

USBPort

DC+

GND

Adaptor

APPLICATIONSCHEMATIC

25040

EN/SET

680 W

2kW

ISET

1mF

ABB

IFULL

R 2

1 kW

3,7

9 8

CHG

VSS

bq25040

www.ti.com

...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009

1.1A, Single-Input, Single Cell Li-Ion Battery Charger

With 50mA LDO and 2.3A Production Test Support

• Soft-Start Feature to Reduce Inrush Current

• 30V Input Rating, with Overvoltage Protection • Status Indication – Power Good and

(OVP) Charging/Done

• Input Voltage Dynamic Power Management • Available in Small 2mm × 3mm DFN-10

Feature Package

• 50mA Integrated Low Dropout Linear

Regulator (LDO)

• Mobile Phones

• 1% Charge Voltage Regulation Accuracy

• Smart Phones

• 10% Charge Current Accuracy

• Portable Media Players

• Single-Input Interface Selects USB 100mA,

• Portable Navigation Devices

500mA or User-Programmable Maximum Input

• Low-Power Handheld Devices

Current Limit

• 4.2V at 2.3A Production Test Mode

• Thermal Regulation and Thermal Shutdown

Protection for Output Current Control

The bq25040 is an integrated Li-ion linear battery charger targeted at space-limited portable applications. It

operates from either a USB port or AC adapter and charges a single cell Li-Ion battery with up to 1.1A of charge

current.

The bq25040 has a single power output that charges the battery. A system load can be placed in parallel with

the battery. The charge current is programmed using the ISET and EN/SET inputs. The input current limit is

programmable to USB100, USB500 or a user programmed current limit up to 1.1A. Additionally, a 4.9V ± 3%

50mA LDO is integrated into the IC for supplying low power external circuitry. The single-input interface

(EN/SET) is used to select the charge current and to place the bq25040 into Production Test Mode. In

Production Test Mode, the bq25040 operates as a linear regulator without a battery connected, where the output

is regulated at 4.2V and supplies up to 2.3A to calibrate GSM transceivers.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (26 pages)

PAGE 1
bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 1.1A, Single-Input, Single Cell Li-Ion Battery Charger With 50mA LDO and 2.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) IN voltage range VIN IN operating voltage range MIN MAX 4.35 26 4.35 (1) 6.7 UNITS V IIN Input current, IN pin (charging) 1.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 PIN CONFIGURATION 10-Pin 2mm × 3mm DFN (TOP VIEW) IN 1 10 BAT ISET 2 9 PG VSS 3 8 CHG bq25040 LDO 4 7 VSS IFULL 5 6 EN/SET PIN FUNCTIONS PIN NAME IN NO. 1 I/O DESCRIPTION I Input power supply. IN is connected to the external dc supply (ac adapter or USB port).
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com BLOCK DIAGRAM Q1 Q2 BAT VIN 80mV + Charge Pump + VIN(DPM) TJ(REG) TJ + + - ISET Min Current Selector VBAT(REG) - USB Enable + + USB Sense Element VBAT(PTM) Charge Pump Fastcharge Precharge 75mA 1.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 TYPICAL APPLICATION CIRCUITS USB or TA VBUS GND D+ D- bq25040 C1 1 mF R1 680 W IN BAT ISET R2 2 kW VCHG R3 1 kW VSS R4 1 kW C2 1 mF + ABB PG CHG IFULL EN/SET GPIO VCHG DET LDO C2 1 mF PWRPD USB DET VUSBIN Figure 1.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS (continued) USB500 Mode, Circuit of Figure 2, TA = 25°C UB500 to PTM Transition Using EN/SET ROUT=8.4Ω, No battery connected LDO Load Transient RLDO = 1kΩ to 100Ω ROUT = 8.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) USB500 Mode, Circuit of Figure 2, TA = 25°C Output Regulation Voltage vs Temperature IC in PTM or CV Regulation Output Regulation Voltage vs Input Voltage IC in PTM or CV Regulation 4.21 4.35 ILOAD = 1 A 4.208 4.3 ILOAD = 1 A 4.206 4.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS (continued) USB500 Mode, Circuit of Figure 2, TA = 25°C Fastcharge Current vs Battery Voltage Precharge Current vs Battery Voltage 800 0.165 RISET = 680 W 790 780 0.16 770 IBAT - A IBAT - A 760 750 0.155 740 730 0.15 720 710 700 2.5 3 3.5 VBAT - V 4 4.5 0.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com DETAILED FUNCTIONAL DESCRIPTION The bq25040 has a single power output that charges a single cell Li-Ion battery from a USB or AC Adapter source. A system load can be placed in parallel with the battery. The charge current is programmed using the ISET and EN/SET inputs.
PAGE 13
bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 Single Input Interface (EN/SET) EN/SET is used to enable/disable the device as well as select the input current limit and Production Test mode. EN/SET is pulled low to enable the device. After the 50µs deglitch expires, the IC enters the 32ms WAIT state.
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bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com Any State IC Enabled EN/SET Rising Edge Detected? IC Disabled NO EN/SET = 0? YES NO YES Begin 1.5ms OFF Timer USB500 Mode ICHARGE = 395mA NO Falling Edge Detected? NO Has 1.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 Input Current Limit (ISET, EN/SET) The fast charge current is programmed using the EN/SET and ISET inputs. The EN/SET input allows the user to select USB100 mode, USB500 mode, or the user programmable current set by ISET.
PAGE 16
bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com 500mV/div VISET 2V/div VIN 200mA/div IOUT USB500 Time - 1ms/div Figure 24. VIN-DPM Protects from Crashing Poor Input Sources 50 mA LDO (LDO) The LDO output of the bq25040 is a low dropout linear regulator (LDO) that supplies up to 50mA while regulating to VLDO.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 Table 2. CONDITION PG DEGLITCH (MEASURED FROM EVENT TO PG HIGH OR LOW) bq25040 ENABLED (EN/SET low) bq25040 DISABLED (EN/SET high) Entering OVP (VIN = 5.5V→10V) 100 µs 0 Leaving OVP (VIN = 10V→5.5V) 450 µs 500 µs Entering SLEEP (VIN = 5.5V→3.6V) 32 ms 0 Leaving SLEEP(VIN = 3.6V→5.
PAGE 18
bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com APPLICATION INFORMATION Selection of Input/Output Capacitors In most applications, all that is needed is a high-frequency decoupling capacitor on the input power pin. For normal charging applications, a 1µF ceramic capacitor, placed in close proximity to the IN pin and GND pad works best.
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bq25040 www.ti.com ...................................................................................................................................................... SLUS910B – MARCH 2009 – REVISED MARCH 2009 Thermal Considerations The bq25040 is packaged in a thermally enhanced SON package. The package includes a thermal pad to provide an effective thermal contact between the IC and the printed circuit board (PCB).
PAGE 20
bq25040 SLUS910B – MARCH 2009 – REVISED MARCH 2009 ...................................................................................................................................................... www.ti.com PCB Layout Considerations It is important to pay special attention to the PCB layout.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 22
PACKAGE MATERIALS INFORMATION www.ti.com 14-Aug-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant BQ25040DQCR WSON DQC 10 3000 180.0 8.4 2.25 3.25 1.05 4.0 8.0 Q1 BQ25040DQCT WSON DQC 10 250 180.0 8.4 2.25 3.25 1.05 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ25040DQCR WSON DQC 10 3000 210.0 185.0 35.0 BQ25040DQCT WSON DQC 10 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.