Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Surge/undervoltage protection Li-Ion WSON 8 (2x2) Surface-mount

FEATURES DESCRIPTION

APPLICATIONS

APPLICATION SCHEMATIC

VDC

GND

1 Fm

OUT

VBAT

bq24380

1 Fm

Charging

Circuit

SYSTEM

AC Adapter

VSS

bq24380

bq24381

bq24382

www.ti.com

......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009

Overvoltage and Overcurrent Protection IC and Li+ Charger Front-End Protection IC With

LDO Mode

• Input Overvoltage Protection

The bq2438x family are charger front-end integrated

circuits designed to provide protection to Li-ion

• Accurate Battery Overvoltage Protection

batteries from failures of the charging circuitry. The IC

• Output Short-Circuit Protection

continuously monitors the input voltage and the

• Soft-Start to Prevent Inrush Currents

battery voltage. The device operates like a linear

• Soft-Stop to Prevent Voltage Spikes regulator, maintaining a 5.5-V (bq24380) or 5-V

(bq24381, bq24382) output with input voltages up to

• 30-V Maximum Input Voltage

the Input overvoltage threshold. During input

• Supports up to 1.7-A Load Current

overvoltage conditions, the IC immediately turns off

• Thermal Shutdown

the internal pass FET disconnecting the charging

circuitry from the damaging input source. Additionally,

• Enable Function

if the battery voltage rises to unsafe levels while

• Fault Status Indication

charging, power is removed from the system. The IC

• Small 2 mm × 2 mm 8-Pin SON Package

checks for short-circuit or overload conditions at its

output when turning the pass FET on, and if it finds

unsafe conditions, it switches off, and then rechecks

the conditions. Additionally, the IC also monitors its

• Smart Phones, Mobile Phones

die temperature and switches off if it exceeds 140 ° C.

• PDAs

When the IC is controlled by a processor, the IC

• MP3 Players

provides status information about fault conditions to

• Low-Power Handheld Devices

the host.

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.

2 PowerPAD is a trademark of Texas Instruments.

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 (19 pages)

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bq24380 bq24381 bq24382 www.ti.com.........................................................................................................................................................
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bq24380 bq24381 bq24382 SLUS805B – APRIL 2008 – 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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bq24380 bq24381 bq24382 www.ti.com......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009 ELECTRICAL CHARACTERISTICS Over junction temperature range -40°C ≤ TJ ≤ 125°C and recommended supply voltage (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IN UVLO Undervoltage lock-out, input power detected threshold CE = LO or HI, VIN: 0 V → 3 V 2.
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bq24380 bq24381 bq24382 SLUS805B – APRIL 2008 – REVISED MARCH 2009......................................................................................................................................................... www.ti.com DEVICE INFORMATION IN 1 VSS 2 8 OUT 7 NC bq2438x NC 3 6 VBAT FAULT 4 5 CE TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION IN 1 I Input power, connected to external DC supply.
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bq24380 bq24381 bq24382 www.ti.com......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS NORMAL POWER-ON SHOWING SOFT-START (bq24380) OVP at POWER-ON ROUT = 6.6 W VIN 5 V/div VIN 2 V/div VOUT 500 mV/div VOUT 2 V/div IOUT 500 mA/div VFAULT 2 V/div t - Time - 2 ms/div Figure 2. t - Time - 2 ms/div Figure 1.
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bq24380 bq24381 bq24382 SLUS805B – APRIL 2008 – REVISED MARCH 2009......................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) SOFT-STOP DURING OCP EVENT (bq24380) BATTERY OVP EVENT (bq24380) VBAT 1 V/div VIN 5 V/div VOUT 2 V/div VOUT 500 mV/div VFAULT 2 V/div IOUT 1 A/div VBAT = 3.8 V to 4.5 V step t - Time - 50 ms/div t - Time - 20 ms/div Figure 7.
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bq24380 bq24381 bq24382 www.ti.com......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009 TYPICAL CHARACTERISTICS (continued) OVP THRESHOLD, VBOVP vs FREE-AIR TEMPERATURE LEAKAGE CURRENT (VBAT PIN) vs FREE-AIR TEMPERATURE 4.40 25 4.35 IIkg - Bat Leakage Current - nA VBOVP - Threshold - V VBAT Rising 4.30 4.25 4.20 4.15 20 15 10 5 VBAT Falling 4.10 4.
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bq24380 bq24381 bq24382 SLUS805B – APRIL 2008 – REVISED MARCH 2009......................................................................................................................................................... www.ti.com AC Adapter OUT 8 1 IN VDC GND Charging Circuit 1 mF 1 mF RBAT VBAT 6 100 kW SYSTEM bq24380 FAULT 4 VSS 2 RPU 47 kW RFAULT 47 kW RCE 47 kW CE 5 Figure 17.
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bq24380 bq24381 bq24382 www.ti.com......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009 DETAILED FUNCTIONAL DESCRIPTION The bq2438x is a highly integrated circuit designed to provide protection to Li-ion batteries from failures of the charging circuit and the input source. The IC continuously monitors the input voltage and the battery voltage.
PAGE 10
bq24380 bq24381 bq24382 SLUS805B – APRIL 2008 – REVISED MARCH 2009......................................................................................................................................................... www.ti.com Start-Up Short-Circuit Protection The bq2438x features overload current protection during start-up. The condition 1 in Figure 18 illustrates start-up into an overload condition.
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bq24380 bq24381 bq24382 www.ti.com......................................................................................................................................................... SLUS805B – APRIL 2008 – REVISED MARCH 2009 APPLICATION INFORMATION Selection of R(BAT) It is recommended that the battery not be tied directly to the VBAT pin of the device, as under some failure modes of the IC, the voltage at the IN pin may appear on the VBAT pin.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (3) 11-Apr-2013 MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.
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PACKAGE MATERIALS INFORMATION www.ti.com 4-Sep-2010 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing BQ24380DSGR WSON DSG 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24380DSGT WSON DSG 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24381DSGR WSON DSG 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24381DSGT WSON DSG 8 250 179.
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PACKAGE MATERIALS INFORMATION www.ti.com 4-Sep-2010 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24380DSGR WSON DSG 8 3000 195.0 200.0 45.0 BQ24380DSGT WSON DSG 8 250 195.0 200.0 45.0 BQ24381DSGR WSON DSG 8 3000 195.0 200.0 45.0 BQ24381DSGT WSON DSG 8 250 195.0 200.0 45.0 BQ24382DSGR WSON DSG 8 3000 195.0 200.0 45.0 BQ24382DSGT WSON DSG 8 250 195.0 200.0 45.
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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.