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FEATURES

DESCRIPTION

TYPICAL APPLICATION

bq24200, bq24201

bq24202, bq24203

bq24204, bq24205

SLUS501C – OCTOBER 2001 – REVISED MARCH 2008

www.ti.com

SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED

APPLICATIONS

• Designed Specifically to Work With

Current-Limited Wall Supplies

The bq2420x series are simple Li-Ion linear charge

management devices targeted at low-cost and space

• Ideal for Low Dropout Charger Design for

limited charger applications. The bq2420x series offer

Single-Cell Li-Ion Packs With Coke or Graphite

integrated powerFET, high-accuracy voltage

Anodes

regulation, temperature monitoring, charge status,

• Integrated PowerFET for 500 mA

and charge termination, in a single monolithic device.

• Integrated Voltage Regulation With 0.5%

The bq2420x is designed to work with a

Accuracy

current-limited wall-mount transformer and therefore

• Battery Insertion and Removal Detection

does not provide any current regulation. However,

these devices offer a fixed internal current limit to

• Charge Termination by Minimum Current and

prevent damage to the internal powerFET. A

Time

time-limited pre-conditioning phase is provided to

• Pre-Charge Conditioning With Safety Timer

condition deeply discharged cells. Once the battery

• Sleep Mode for Low-Power Consumption

reaches the charge voltage, the high accuracy

voltage regulation loop takes over and completes the

• Charge Status Output for LED or Host

charge cycle. Charge is terminated based on

Processor Interface Indicates

minimum current. An internal charge timer provides a

• Charge-in-Progress, Charge Completion, and

backup safety for charge termination.

Fault Conditions

Other standard features include an automatic sleep

• Optional Temperature Monitoring Before and

mode activated when V

falls below the battery

During Charge

voltage and a recharge feature activated when the

• Small, 8-Pin Power-Pad MSOP Package

battery voltage falls below the V

RCH

threshold.

In addition to the standard features, the core product

provides two additional enhancements: temperature

monitoring and status display. The temperature-

sense circuit continuously measures battery

temperature using an external thermistor and inhibits

charge until the battery temperature is within the

user-defined thresholds. The STAT pin indicates

three conditions of operation of the charger. These

conditions are charge-in-progress, charge complete,

and fault. This output can be used to drive an LED or

an interface to a microcontroller.

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 (20 pages)

PAGE 1
www.ti.com bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED APPLICATIONS FEATURES 1 • • • • • • • • • • • • Designed Specifically to Work With Current-Limited Wall Supplies Ideal for Low Dropout Charger Design for Single-Cell Li-Ion Packs With Coke or Graphite Anodes Integrated PowerFET for 500 mA Integrated Voltage Regulation With 0.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 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. AVAILABLE OPTIONS TJ CHARGE REGULATION VOLTAGE OPTIONAL FUNCTIONS MARKING PACKAGED DEVICES (DGN) (1) 4.2 V STAT and TS AZC bq24200DGN 4.1 V STAT and TS AZD bq24201DGN 4.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VALUE UNIT Supply voltage (Vcc with respect to GND) 16.5 V Input voltage, IN, STAT, TS (all with respect to GND) 16.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 OUTPUT CURRENT over 0°C ≤ TJ ≤ 125°C and supply voltage range (unless otherwise noted) PARAMETER TEST CONDITIONS IO(OUT) Output current See (1) I(SC) Short-circuit trip current See (1) (1) MIN TYP 1 MAX UNIT 500 mA 1.6 A Assured by design, not production tested.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 CE over 0°C ≤ TJ ≤ 125°C and supply voltage range (unless otherwise noted) PARAMETER VIL(CE) VIH(CE) TEST CONDITIONS Input (low) voltage IIL = 5 µA Input (high) voltage IIH = 20 µA MIN TYP 0 MAX UNIT Vcc–1 V Vcc–0 .
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 FUNCTIONAL BLOCK DIAGRAM DETAILED DESCRIPTION IN: This pin is connected to the source of the internal P-channel powerFET. OUT: This pin is connected to the drain of the internal P-channel powerFET. Battery voltage sense (BAT): Voltage sense-input tied directly to the positive side of the battery. Temperature sense input (TS): Input for an external battery-temperature monitoring circuit.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 TYPICAL CHARACTERISTICS OUTPUT VOLTAGE vs JUNCTION TEMPERATURE DROPOUT VOLTAGE vs JUNCTION TEMPERATURE Figure 1. Figure 2. DROPOUT VOLTAGE vs OUTPUT VOLTAGE SUPPLY CURRENT vs JUNCTION TEMPERATURE Figure 3. Figure 4.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 APPLICATION INFORMATION Figure 5. Low Dropout Single-Cell Li-Ion/Li-Pol Charger FUNCTIONAL DESCRIPTION The bq2420x supports a precision Li-Ion or Li-Pol charging system suitable for single-cells with either coke or graphite anodes. Figure 5 shows an application schematic and Figure 6 shows the typical charge profile.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 Figure 6. Typical Charge Profile Figure 7.
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bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 OPERATIONAL FLOW DIAGRAM Figure 8.
PAGE 11
bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com R T1 + R T2 + SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 ǒ5 RT CǓ RT H ǒ3 ǒRT C * RT HǓǓ ǒ5 ǒ2 (1) RT CǓ RT H RT CǓ * ǒ7 RT HǓ (2) For PTC Thermisters: R T1 + R T2 + ǒ5 ǒ3 ǒRT H * RT CǓǓ ǒ5 ǒ2 RT CǓ RT H RT H RT HǓ * ǒ7 (3) RT CǓ RT CǓ (4) Where RTC is the cold temperature resistance and RTH is the hot temperature resistance of thermistor, as specified by the thermistor manufacturer.
PAGE 12
bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 www.ti.com SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 After a charge termination, the bq2420x restarts the charge once the voltage on the BAT pin falls below the V(RCH) threshold. This feature keeps the battery at full capacity at all times. SLEEP MODE The bq2420x enters the low-power sleep mode if the Vcc is removed from the circuit (i.e., the Vcc and IN pins are floating).
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 31-Oct-2013 LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 31-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 BQ24200DGNR MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 BQ24202DGNR MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 31-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24200DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 35.0 BQ24202DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 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.