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### bq24030 Datasheet：单芯片充电与系统电源路径管理IC (bqTINY™) #### 概述 bq24030 是一款由德州仪器（TI）开发的高度集成的单芯片锂离子线性充电器及系统电源路径管理设备，主要应用于空间受限的便携式设备中。这款芯片不仅提供了充电功能，还具备了智能的电源路径管理能力，能够确保系统的持续运行同时对电池进行高效充电。 #### 特点 1. **高度集成**：集成了USB端口、直流供电（AC适配器）、自主电源选择等功能。 2. **小型封装**：采用3.5mm x 4.5mm QFN封装，适用于小型设备。 3. **动态电源路径管理 (DPPM)**：允许AC适配器或USB端口同时为系统供电并为电池充电。 4. **电源补充模式**：当USB或AC输入电流不足时，可以利用电池补充电源。 5. **自主电源选择**：自动识别AC适配器或USB作为主电源源。 6. **USB充电控制**：集成USB充电控制功能，支持最大100mA和500mA输入电流限制。 7. **动态总电流管理**：针对USB应用，支持高达2A的总电流。 8. **内置低压差稳压器 (LDO)**：提供3.3V稳定输出电压。 9. **热调节**：通过温度监控来控制充电过程，防止过热。 10. **状态指示输出**：提供LED指示灯接口，指示充电状态和故障情况。 11. **多重保护机制**：包括反向电流保护、短路保护和过热保护等。 #### 应用场景 - **智能手机和平板电脑 (PDA)**：适用于需要高性能电池管理和充电功能的移动设备。 - **MP3播放器**：为小型音频设备提供高效的电源管理解决方案。 - **数码相机及其他手持设备**：支持单节锂电池或锂聚合物电池的小型便携设备。 - **互联网设备**：满足便携式互联网设备对于可靠电源的需求。 #### 工作原理 bq24030 的核心优势在于其独特的动态电源路径管理功能 (DPPM)，它能够确保在不同电源供应条件下系统始终处于工作状态。具体来说： 1. **电源路径管理**： - 当连接AC适配器时，bq24030 将优先使用AC适配器为系统供电，并同时为电池充电。 - 当仅连接USB端口时，芯片会根据USB提供的电流限制，合理分配给系统和充电需求。 - 在某些情况下，如USB输入电流不足时，bq24030 可以自动启用电池来补充电源，确保系统正常运行。 2. **充电管理**： - 支持单节锂离子或锂聚合物电池的线性充电方式。 - 内置精确的电流和电压调节机制，确保充电效率的同时避免过充或过放。 - 集成热调节功能，防止在充电过程中因过热而损坏电池。 3. **自主电源选择**： - 当AC适配器和USB端口都可用时，芯片会自动选择最合适的电源为系统供电和充电。 - 在AC适配器不可用的情况下，芯片将自动切换到USB供电模式。 - 支持电池包不存在或故障情况下的正常运行，即使电池严重放电也能快速启动系统。 #### 总结 bq24030 是一款专为小型便携式设备设计的高度集成电源管理芯片，通过其独特的动态电源路径管理和自主电源选择功能，确保了系统的连续供电和电池的有效管理。无论是智能手机、MP3播放器还是其他便携式电子设备，都可以从这款芯片所提供的高效、可靠的电源解决方案中获益。

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USB BAT

OUT

bq2403x

PACK+

PACK−

System

VDC

GND

VBUS

GND

D+

D −

USB Port

AC Adapter

Q2Q3

UDG−04082

40 mΩ

(2)

bq24030, bq24031

bq24032A, bq24035, bq24038

www.ti.com

............................................................................................................................................... SLUS618H –AUGUST 2004–REVISED OCTOBER 2009

SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY™)

Check for Samples: bq24030, bq24031 bq24032A, bq24035, bq24038

FEATURES

APPLICATIONS

• Smart Phones and PDA

• Small 3,5 mm × 4,5 mm QFN Package

• MP3 Players

• Designed for Single-Cell Li-Ion- or

• Digital Cameras Handheld Devices

Li-Polymer-Based Portable Applications

• Internet Appliances

• Integrated Dynamic Power-Path Management

(DPPM) Feature Allowing the AC Adapter or

DESCRIPTION

the USB Port to Simultaneously Power the

System and Charge the Battery

The bqTINY™ III-series of devices are highly

• Power Supplement Mode Allows Battery to integrated Li-ion linear chargers and system

power-path management devices targeted at

Supplement the USB or AC Input Current

space-limited portable applications. The bqTINY

• Autonomous Power Source Selection (AC

III-series offer integrated USB-port and DC supply

Adapter or USB)

(AC adapter), power-path management with

• Integrated USB Charge Control With

autonomous power-source selection, power FETs

Selectable 100-mA and 500-mA Maximum

and current sensors, high accuracy current and

Input Current Regulation Limits

voltage regulation, charge status, and charge

termination, in a single monolithic device.

• Dynamic Total Current Management

for USB

The bqTINY III-series powers the system while

independently charging the battery. This feature

• Supports Up to 2-A Total Current

reduces the charge and discharge cycles on the

• 3.3-V Integrated LDO Output

battery, allows for proper charge termination and

• Thermal Regulation for Charge Control

allows the system to run with an absent or defective

battery pack. This feature also allows for the system

• Charge Status Outputs for LED or System

to instantaneously turn on from an external power

Interface Indicates Charge and Fault

source in the case of a deeply discharged battery

Conditions

pack. The IC design is focused on supplying

• Reverse Current, Short-Circuit, and Thermal

continuous power to the system when available from

Protection

the AC, USB, or battery sources.

• Power Good (AC Adapter and USB Port

Present) Status Outputs

• Charge Voltage Options: 4.1V, 4.2V, or 4.36V

POWER FLOW DIAGRAM

(1) See Figure 2 and functional block diagram for more detailed feature information.

(2) P-FET back gate body diodes are disconnected to prevent body diode conduction.

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.

2bqTINY is a trademark of Texas Instruments.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

bq24030, bq24031

bq24032A, bq24035, bq24038

SLUS618H –AUGUST 2004–REVISED OCTOBER 2009...............................................................................................................................................

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

DESCRIPTION (CONTINUED)

The power select pin, PSEL, defines which input source is to be used first (primary source – AC or USB). If the

primary source is not available, then the IC automatically switches over to the other secondary source if available

or the battery as the last option. If the PSEL is set low, the USB input is selected first and if not available, the AC

line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature

allows the use of one input connector, where the host programs the PSEL pin according to what source is

connected (AC adaptor or USB port).

The bq24038 replaces USBPG with pin VBSEL, to enable user selection of the charge voltage. In addition, pin

ACPG was modified to PG. PG is active low when either ac power or USB power is detected.

The ISET1 pin programs the battery's fast charge constant current level with a resistor. During normal AC

operation, the input supply provides power to both the OUT (System) and BAT pins. For peak or excessive loads

(typically when operating from the USB power, PSEL = Low) that would cause the input source to enter current

limit (or Q3 - USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic

power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in

system voltage. This feature allows the selection of a lower current rated adaptor based on the average load

SYS-AVG

+ I

BAT-PGM

) rather than a high peak transient load.

ORDERING INFORMATION

(1)

BATTERY OUT PIN FOR AC PART PACKAGE

VOLTAGE (V) INPUT CONDITIONS

(2)

NUMBER

(3) (4)

MARKING

4.2 Regulated to 6 V

(5)

bq24030RHLR ANB

4.2 Regulated to 6 V

(5)

bq24030RHLT ANB

4.1 Regulated to 6 V

(5)

bq24031RHLR BZJ

4.1 Regulated to 6 V

(5)

bq24031RHLT BZJ

4.2 Regulated to 4.4 V

(5)

bq24032ARHLR BPE

–40°C to 125°C

4.2 Regulated to 4.4 V

(5)

bq24032ARHLT BPE

4.2 Cutoff for AC overvoltage

(6)

bq24035RHLR ANA

4.2 Cutoff for AC overvoltage

(6)

bq24035RHLT ANA

4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLR BOW

4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLT BOW

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

Web site at www.ti.com.

(2) When power is applied via the USB pin (PSEL=low), the input voltage is switched straight through to the OUT pin, unless the USB input

current limit is active, and then the OUT pin voltage will typically drop to the DPPM-OUT threshold or Battery voltage (which ever is

higher).

(3) The RHL package is available in the following options:

R - taped and reeled in quantities of 3,000 devices per reel.

T - taped and reeled in quantities of 250 devices per reel.

(4) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for

use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including

bromine (Br) or antimony (Sb) above 0.1% of total product weight.

(5) If AC < V

O(OUT-REG)

, the AC is connected to the OUT pin by a P-FET, (Q1).

(6) If AC > V

(CUT-OFF)

the P-FET disconnects the OUT pin from the AC.

Product Folder Link(s): bq24030, bq24031 bq24032A, bq24035, bq24038

bq24030, bq24031

bq24032A, bq24035, bq24038

www.ti.com

............................................................................................................................................... SLUS618H –AUGUST 2004–REVISED OCTOBER 2009

ABSOLUTE MAXIMUM RATINGS

(1)

over operating free-air temperature range (unless otherwise noted)

bq24030, bq24031, bq24032A,

bq24035, bq24038

AC (DC voltage wrt (with respect to) VSS) –0.3 V to 18 V

Input voltage

USB (DC voltage wrt VSS) –0.3 V to 7 V

BAT, CE, DPPM, ACPG, PSEL, OUT, ISET1, ISET2, STAT1,

–0.3 V to 7 V

STAT2, TS, USBPG , PG, VBSEL (all DC voltages wrt VSS)

Input voltage

LDO (DC voltage wrt VSS) –0.3 V to V

O(OUT)

+ 0.3 V

TMR –0.3 V to V

O(LDO)

+ 0.3 V

AC 3.5 A

Input current

USB 1000 mA

OUT 4 A

Output current

BAT

(2)

–4 A to 3.5 A

Output source current (in

LDO 30 mA

regulation at 3.3 V LDO)

Output sink current ACPG, STAT1, STAT2, USBPG, PG 15 mA

Storage temperature range, T

stg

–65°C to 150°C

Junction temperature range, T

–40°C to 150°C

Lead temperature (soldering, 10 seconds) 300°C

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage

values are with respect to the network ground terminal unless otherwise noted.

(2) Negative current is defined as current flowing into the BAT pin.

RECOMMENDED OPERATING CONDITIONS

MIN MAX UNIT

bq24030/31/32A/35, bq24038 (at VBSEL = LOW) 4.35 16

Supply voltage (from AC input)

(1) (2)

bq24038 (at VBSEL = HIGH) 4.55 16 V

Supply voltage (from USB input)

(1)

4.35 6

Input current, AC 2

USB

Input current, USB 0.5

Operating junction temperature range –40 125 °C

(1) V

is defined as the greater of AC or USB input.

(2) Verify that power dissipation and junction temperatures are within limits at maximum V

DISSIPATION RATINGS

≤ 40°C DERATING FACTOR

PACKAGE θ

POWER RATING T

> 40°C

20-pin RHL

(1)

1.81 W 21 mW/°C 46.87 °C/W

(1) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. This is

connected to the ground plane by a 2×3 via matrix.

Product Folder Link(s): bq24030, bq24031 bq24032A, bq24035, bq24038

bq24030, bq24031

bq24032A, bq24035, bq24038

SLUS618H –AUGUST 2004–REVISED OCTOBER 2009...............................................................................................................................................

www.ti.com

ELECTRICAL CHARACTERISTICS

over junction temperature range (0°C ≤ T

≤ 125°C) and the recommended supply voltage range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

INPUT BIAS CURRENTS

CC(SPLY)

Active supply current, VCC V

VCC

> V

VCC(min)

1 2 mA

(AC)

< V

(BAT)

, V

(USB)

< V

(BAT)

CC(SLP)

Sleep current (current into BAT pin) 2.6 V ≤ V

I(BAT)

≤ V

O(BAT-REG)

, 2 5

Excludes load on OUT pin

I(AC)

≤ 6 V, Total current into AC pin with chip disabled,

CC(AS-STDBY)

AC standby current 200

Excludes all loads, CE=LOW, after t

(CE-HOLDOFF)

delay

CC(USB-

Total current into USB pin with chip disabled, Excludes all μA

USB standby current 200

STDBY)

loads, CE=LOW, after t

(CE-HOLDOFF)

delay

Total current into BAT pin with AC and/or USB present

CC(BAT-

BAT standby current and chip disabled; Excludes all loads (OUT and LDO), 45 60

STDBY)

CE=LOW, after t

(CE-HOLDOFF)

delay, 0°C ≤ T

≤ 85°C

(1)

IB(BAT)

Charge done current, BAT Charge DONE, AC or USB supplying the load 1 5

HIGH AC CUTOFF MODE

I(AC)

> 6.8 V, AC FET (Q1) turns off, USB FET (Q3) turns

CUT-OFF

Input ac cutoff voltage, bq24035 on if USB power present, otherwise BAT FET (Q2) turns 6.1 6.4 6.8 V

on.

LDO OUTPUT

Active only if AC or USB is present,

O(LDO)

Output regulation voltage 3.3 V

I(OUT)

≥ V

O(LDO)

+ (I

O(LDO)

× R

DS(on)

)

Regulation accuracy

(2)

–5% 5%

O(LDO)

Output current 20 mA

DS(on)

On resistance OUT to LDO 50 Ω

(OUT)

(3)

Output capacitance 1 μF

OUT PIN-VOLTAGE REGULATION

(4)

bq24030/31 V

I(AC)

≥ 6 V+V

6.0 6.3

Output

O(OUT-REG)

regulation bq24032A V

I(AC)

≥ 4.4 V+V

4.4 4.5 V

voltage

bq24038 VBSEL = HIGH or VBSEL = LOW, V

I(AC)

> 4.4 V+V

4.4 4.5

OUT PIN – DPPM REGULATION

(DPPM-SET)

DPPM set point

(5)

DPPM-SET

< V

OUT

2.6 5 V

(DPPM-SET)

DPPM current source AC or USB present 95 100 105 μA

SF DPPM scale factor V

(DPPM-REG)

= V

(DPPM-SET)

× SF 1.139 1.150 1.162

(1) This includes the quiescent current for the integrated LDO.

(2) In standby mode (CE low) the accuracy is ±10%.

(3) LDO output capacitor not required but one with a value of 0.1 μF is recommended.

(4) When power is applied to the USB pin and PSEL is low, the USB input is switched straight through to the OUT pin (not regulated). This

voltage may drop to the DPPM-OUT threshold or battery voltage (which ever is higher) if the USB input current limit is active.

(5) V

(DPPM-SET)

is scaled up by the scale factor for controlling the output voltage V

(DPPM-REG)

Product Folder Link(s): bq24030, bq24031 bq24032A, bq24035, bq24038

bq24030, bq24031

bq24032A, bq24035, bq24038

www.ti.com

............................................................................................................................................... SLUS618H –AUGUST 2004–REVISED OCTOBER 2009

ELECTRICAL CHARACTERISTICS (continued)

over junction temperature range (0°C ≤ T

≤ 125°C) and the recommended supply voltage range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

OUT PIN – FET (Q1, Q3, AND Q2) DROP-OUT VOLTAGE (RDSon)

I(AC)

≥ V

CC(min)

, PSEL = High, I

I(AC)

= 1 A,

(ACDO)

AC to OUT dropout voltage

(6)

300 475

O(OUT)

+ I

O(BAT)

), or no AC

I(USB)

≥ V

CC(min)

, PSEL = Low, ISET2 = High,

140 180 mV

I(USB)

= 0.4 A, (I

O(OUT)

O(BAT)

), or no AC

(USBDO)

(7)

USB to OUT dropout voltage

I(USB)

≥ V

CC(min)

, PSEL = Low, ISET2 = Low,

28 36

I(USB)

= 0.08 A, (I

O(OUT)

+ I

O(BAT)

)

BAT to OUT dropout voltage

(BATDO)

I (BAT)

≥ 3 V, I

i(BAT)

= 1.0 A, V

< V

i(BAT)

40 100 mV

(discharging)

OUT PIN - BATTERY SUPPLEMENT MODE

Enter battery supplement mode V

I(OUT)

BSUP1

(battery supplements OUT current V

I(BAT)

> 2 V ≤ V

I(BAT)

in the presence of input source – 60 mV

I(OUT)

BSUP2

Exit battery supplement mode V

I(BAT)

> 2 V ≥ V

I(BAT)

– 20 mV

OUT PIN - SHORT CIRCUIT

Current source between BAT to OUT for short-circuit

OSH1

BAT to OUT short-circuit recovery 10 mA

recovery to V

I(OUT)

≤ V

I(BAT)

–200 mV

SHAC

AC to OUT short-circuit limit V

I(OUT)

≤ 1 V 500

Ω

SHVSB

USB to OUT short-circuit limit V

I(OUT)

≤ 1 V 500

BAT PIN CHARGING – PRECHARGE

Precharge to fast-charge transition

(LOWV)

Voltage on BAT 2.9 3 3.1 V

threshold

Deglitch time for fast-charge to t

FALL

= 100 ns, 10 mV overdrive,

DGL(F)

22.5 ms

precharge transition

(8)

I(BAT)

decreasing below threshold

1 V < V

I(BAT)

< V

(LOWV)

, t < t

(PRECHG)

O(PRECHG)

Precharge range 10 150 mA

O(PRECHG)

= (K

(SET)

× V

(PRECHG)

)/ R

SET

(PRECHG)

Precharge set voltage 1 V < V

I(BAT)

< V

(LOWV)

, t < t

(PRECHG)

230 250 270 mV

BAT PIN CHARGING - CURRENT REGULATION

i (BAT)

> V

(LOWV)

, V

I(OUT)

- V

I (BAT)

> V

(DO-MAX)

O(BAT)

AC battery charge current range

(9)

PSEL = High I

OUT(BAT)

= (K

(SET)

× V

(SET)

/ R

SET

), 100 1000 1500 mA

(OUT) > V

(OUT-REG) + V

(DO-MAX)

PBAT

BAT to OUT pullup V

i (BAT)

< 1 V 1000

Ω

AC to OUT and USB to OUT

POUT

I(OUT)

< 1 V 500

short-circuit pullup

Battery charge current set Voltage on ISET1, V

VCC

≥ 4.35 V,

(SET)

2.475 2.500 2.525 V

voltage

(10)

I(OUT)

- V

I(BAT)

> V

(DO-MAX)

, V

I(BAT)

> V

(LOWV)

100 mA ≤ I

O(BAT)

≤ 1 A 400 425 450

(SET)

Charge current set factor, BAT

10 mA ≤ I

O(BAT)

≤ 100 mA

(11)

300 450 600

(6) V

DO(max)

, dropout voltage is a function of the FET, R

DS(on)

, and drain current. The dropout voltage increases proportionally to the

increase in current.

(7) R

DS(on)

of USB FET Q3 is calculated by: (V

USB

– V

OUT

) / (I

OUT

+ I

BAT

) when I

I(USB)

≤ I

I(USB-MIN)

(FET fully on, not in regulation).

(8) All deglitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that the

program current is reduced.

(9) When input current remains below 2 A, the battery charging current may be raised until the thermal regulation limits the charge current.

(10) For half-charge rate, V

(SET)

is 1.25 V ± 25 mV for bq24032A/38 only.

(11) Specification is for monitoring charge current via the ISET1 pin during voltage regulation mode, not for a reduced fast-charge level.

Product Folder Link(s): bq24030, bq24031 bq24032A, bq24035, bq24038

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bq24030 datasheet

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