LM3658SD-A [TI]

LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications; LM3658双源USB / AC锂化学充电器IC，适用于便携式应用


型号：	LM3658SD-A
厂家：	TEXAS INSTRUMENTS
描述：	LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications LM3658双源USB / AC锂化学充电器IC，适用于便携式应用便携式
文件：	总20页 (文件大小：792K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LM3658

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SNVS328E –MAY 2005–REVISED MARCH 2007

LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

Check for Samples: LM3658

FEATURES

DESCRIPTION

The LM3658 is a single chip charger IC designed for

handheld applications. It can safely charge and

maintain a single cell Li-Ion/Polymer battery operating

from an AC wall adapter or USB power source. Input

power source selection of USB/AC is automatic. With

both power sources present, the AC power source

has priority. Charge current is programmed through

an external resistor when operating from an AC wall

adapter allowing charge currents from 50 mA to 1000

mA. When the battery is charged using USB power,

charge currents of 100 mA or 500 mA are pin-

selectable. The termination voltage is controlled to

within ±0.35% of 4.2V.

•

Integrated Power FETs with Thermal

Regulation

•

Charges from Either an AC Wall Adapter or

USB Power Source with Automatic Source

Selection

•

50 mA to 1000 mA Charge Currents Using AC

Wall Adapter

Pin-Selectable USB Charge Currents of 100

mA or 500 mA

LDO Mode with 1A of Source Current is

Automatically Invoked When the Battery is

Absent and the AC Wall Adapter is Connected

The LM3658 requires few external components and

integrates internal power FETs, reverse current

protection and current sensing. The internal power

FETs are thermally regulated to obtain the most

•

Continuous Battery Temperature Monitoring

Built-in Multiple Safety Timers

Charge Status Indication

efficient charging rate for

temperature.

given ambient

Continuous Over-current and Temperature

Protection

The LM3658 operates in five modes: pre-qualification

mode, constant-current mode, constant-voltage

mode, top-off mode and maintenance mode.

Additionally, the charger IC operates as a linear

regulator in “LDO mode”, when the AC wall adapter is

connected and no battery is present. Optimal battery

management is obtained through thermal regulation,

battery temperature measurement and multiple safety

timers. The LM3658 provides two open-drain outputs

for LED status indication or connection to GPIOs.

•

Near-depleted Battery Pre-conditioning

Sleep Mode with Ultra Low Quiescent Current

On-board Kelvin-sensing Achieves ±0.35%

Termination Accuracy

•

Maintenance Mode with Automatic Recharge

Thermally Enhanced 3 mm x 3 mm WSON

Package

APPLICATIONS

Typical Application

•

Smartphones

CHG_IN

4.5V to 6V

Digital Still Cameras

PDAs

BATT

1 mF

Battery

Pack

Hard Drive and Flash-based MP3 Players

USB-powered Devices

USBpwr

4.5V to 6V

LM3658

Iset

GND

USB_sel

EN_b

Stat1

Stat2

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.

All trademarks are the property of their respective owners.

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.

LM3658

SNVS328E –MAY 2005–REVISED MARCH 2007

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Connection Diagram and Package Mark Information

Die-Attach

Pad (DAP)

Die-Attach

Pad (DAP)

GND

Top View

Bottom View

Figure 1. WSON10 Package Drawing

Pin Descriptions

Pin #

Name

CHG_IN

Description

AC wall adapter input pin.

USB power input pin.

USBpwr

GND

Power and signal ground pin.

USB_sel

Pulling this pin low limits the USB charge current to 100 mA. Pulling this pin high limits the USB charge current to

500 mA.

EN_b

Pulling this pin low enables the charger. Pulling this pin high disables the charger.

STAT2

Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIOs.

See Operation Description section for more detail.

STAT1

I_SET

Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIO. See

Operation Description section for more detail.

A resistor is connected between this pin and GND. The resistor value determines the full-rate charge current when

using the AC source.

T_S

Battery temperature sense pin. This pin must be connected to battery pack’s temperature sense output pin.

For the LM3658SD-B version, leaving this pin open indicates that the battery pack is not present. The charger IC

will invoke LDO mode if this pin is left floating. See Operation Description section for more detail.

BATT

Positive battery terminal connection.

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.

(1)(2)(3)

ABSOLUTE MAXIMUM RATINGS

CHG_IN, USBpwr (V_CC

)

−0.3V to +6.5V

−0.3V to CHG_IN or USBpwr

Internally Limited

+150°C

All other pins except GND

(4)

Power Dissipation

Junction Temperature (T_J-MAX)

Storage Temperature Range

−65°C to +150°C

2.0 kV

(5)

ESD Rating

Human Body Model:

Machine Model:

200V

(1) All voltages are with respect to the potential at the GND pin.

(2) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under

which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits

and associated test conditions, see the Electrical Characteristics tables.

(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(4) The LM3658 has built-in thermal regulation to regulate the die temperature to 120ºC. See Operation Description section for more detail.

(5) The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF

capacitor discharged directly into each pin. MIL-STD-883 3015.7

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(1)(2)

OPERATING RATINGS

Input Voltage Range for CHG_IN

4.5V to 6.0V

4.35V to 6.0V

Input Voltage Range for USB_pwr

Recommended Load Current

Power Dissipation⁽³⁾

0 to 1000 mA

Internally Limited

−40°C to +125°C

−40°C to +85°C

Junction Temperature (T_J) Range

Ambient Temperature (T_A) Range

(1) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under

which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits

and associated test conditions, see the Electrical Characteristics tables.

(2) All voltages are with respect to the potential at the GND pin.

(3) The LM3658 has built-in thermal regulation to regulate the die temperature to 120ºC. See Operation Description section for more detail.

THERMAL PROPERTIES

θ_JA, Junction-to-Ambient Thermal Resistance

(1)

54°C/W

(1) Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power

dissipation exists, special care must be paid to thermal dissipation issues in board design. Please refer to application note AN-1187

(SNOA401) for more detail.

ELECTRICAL CHARACTERISTICS

Unless otherwise noted, V_CC(V_{CHG_IN}and/or V_USBpwr) = 5V, V_BATT= 3.5V. C_{CHG_IN}= 1 µF, C_USBpwr= 1 µF, C_BATT= 1 µF. Typical

values and limits appearing in normal type apply for T_J= 25°C. Limits appearing in boldface type apply over T_J= 0°C to

(1)(2)(3)

+85°C.

Symbol

CHARGER

V_{CHG_IN}

Parameter

Conditions

Min

Typ

Max

Units

AC Wall Adapter Input Voltage

Range

4.5

6.0

V_USBpwr

I_{CC_PD}

USB Input Voltage Range

4.35

Quiescent Current in Power

Down Mode

V_BATT> V_CC–V_{OK_CHG}

µA

I_{CC_STBY}Quiescent Current in Standby

Mode

V_BATT< V_CC− V_{OK_CHG}

V_CC> V_POR

400

600

µA

EN_b = High

I_{BATT_PD}Battery Leakage Current in

Power Down Mode

V_BATT> V_CC+ V_{OK_CHG}

0.01

2.0

µA

I_{BATT_MAI}Battery Leakage Current in

STAT1 = off, STAT2 = on, adapter or USB

connected, V_BATT= 4.2V

Maintenance Mode

V_{OK_CHG}CHG_IN or USBpwr OK Trip-

Point

V_CC– V_BATT(Rising)

V_CC– V_BATT(Falling)

200

V_POR

V_CCPOR Trip-Point

V_CC(Rising)

V_BATT< V_CC– V_{OK_CHG}

V_{FULL_RATE}< V_BATT< V_TERM

3.0

4.2

V_TERM

Battery Charge Termination

Voltage

I_CHG= 10% of its value when V_BATT= 3.5V

Battery Charge Termination

Voltage Tolerance

T_A= 25°C

−0.35

−1.5

+0.35

T_A= 0°C to 85°C

+1.5

V_{CHG_DO}CHG_IN Drop-Out Voltage

V_{USB_DO}USBpwr Drop-Out Voltage

V_BATT= V_TERM, I_CHG= 1A

V_CC> V_BATT+ V_{CHG_DO_MAX}

500

250

V_BATT= V_TERM, USB_sel = high

V_CC> V_BATT+ V_{USB_DO_MAX}

(1) All voltages are with respect to the potential at the GND pin.

(2) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not specified, but do represent the most

likely norm.

(3) LM3658 is not intended as a Li-Ion battery protection device; battery used in this application should have an adequate internal

protection.

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ELECTRICAL CHARACTERISTICS (continued)

Unless otherwise noted, V_CC(V_{CHG_IN}and/or V_USBpwr) = 5V, V_BATT= 3.5V. C_{CHG_IN}= 1 µF, C_USBpwr= 1 µF, C_BATT= 1 µF. Typical

values and limits appearing in normal type apply for T_J= 25°C. Limits appearing in boldface type apply over T_J= 0°C to

(1)(2)(3)

+85°C.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

I_CHG

CHG_IN Full-Rate Charge

Current Range (see full-rate

charge mode description)

6V ≥ V_CC≥ 4.5V

V_BATT< V_CC– V_{OK_CHG}

V_{FULL_RATE}< V_BATT< V_TERM

I_CHG= K_ISET/R_ISET

1000

I_CHG

CHG_IN Full Rate Charge

Current

R_ISET= 10kΩ

R_ISET= 5 kΩ

R_ISET= 3.3kΩ

220

465

700

245

500

760

270

535

820

K_ISET

Charge Current Set Coefficient 6V ≥ V_CC≥ 4.5V

I_CHG= K_ISET/R_ISET(see full-rate V_BATT< V_CC– V_{OK_CHG}

2500

AΩ

charge mode description)

V_{FULL_RATE}< V_BATT< V_TERM

V_ISET

Charge Current Set Voltage

6V ≥ V_CC≥ 4.5V

V_BATT< V_CC– V_{OK_CHG}

V_{FULL_RATE}< V_BATT< V_TERM

2.5

I_{USB_L}

I_{USB_H}

USB Full-Rate Charge Low

Current

100

USB Full-Rate Charge High

Current

400

450

500

I_PREQUALPre-Qualification Current

V_{FULL_RA}Full-Rate Qualification

V_BATT= 2V, for both AC adapter and USB

V_BATTrising, transition from pre-qualification to full-

rate charging

2.9

3.0

3.1

Threshold

Full Rate Hysteresis

V_BATTfalling

I_EOC

End-of-Charge Current, Percent 6V ≥ V_CC≥ 4.5V

from Full-Range Current

V_BATT< V_CC– V_{OK_CHG}

V_{FULL_RATE}< V_BATT< V_TERM

I_TOPOFF

Minimum Top-Off Charge

Current

6V ≥ V_CC≥ 4.5V

V_BATT< V_CC– V_{OK_CHG}

V_BATT= V_TERM

1.25

3.94

0.46

2.5

4.0

3.75

4.07

0.52

V_RESTARTRestart Threshold Voltage

V_BATTfalling, transition from EOC to pre-

qualification mode

V_TL

Battery Temperature Sense

Comparator Low-Voltage

Threshold

0.49

V_TH

Battery Temperature Sense

Comparator High-Voltage

Threshold

2.44

2.49

2.54

106

I_TSENSE

T_REG

T_SD

Battery Temperature Sense

Current

100

120

165

4.0

µA

°C

Regulated Junction

Temperature

Thermal Shutdown

Temperature

V_TLDO

V_LDO

LDO mode detection threshold TS pin voltage for entry into LDO mode.

For LM3658SD-B only

3.95

-3.0

LDO Mode Regulation

6V ≥ V_{CHG_IN}≥ 4.5V

T_S= Floating

4.2

+3.0

I_BATT= 100mA

DETECTION AND TIMING

T_POK

Power OK Deglitch Time

V_BATT< V_CC– V_{OK_CHG}

100

T_PREQUALPre-Qualification Timer

mins

T_{PQ_FULL}Deglitch Time for Pre-

Qualification to Full-Rate

Charge Transition

270

300

330

T_{FULL_PQ}Deglitch Time for Full-Rate to

Pre-Qualification Transition

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ELECTRICAL CHARACTERISTICS (continued)

Unless otherwise noted, V_CC(V_{CHG_IN}and/or V_USBpwr) = 5V, V_BATT= 3.5V. C_{CHG_IN}= 1 µF, C_USBpwr= 1 µF, C_BATT= 1 µF. Typical

values and limits appearing in normal type apply for T_J= 25°C. Limits appearing in boldface type apply over T_J= 0°C to

(1)(2)(3)

+85°C.

Symbol

Parameter

Charge Timer

Conditions

Min

270

540

270

Typ

300

600

300

Max

330

660

330

Units

T_CHG

LM3658SD, LM3658SD-B and LM3658SD-A with

USB_sel=high

mins

LM3658SD-A with USB_sel=low

T_EOC

Deglitch Time for End-of-

Charge Transition

T_BATTEMPDeglitch Time for Battery

Temperature Fault

T_DGL

Deglitch Time for EN_b and

USB_sel Pins

270

300

330

T_ITOPOFFDeglitch Time for I_TOPOFF

T_TOPOFFTop-Off Charging Timer

LM3658SD, LM3658SD-B and LM3658SD-A with

USB_sel=high

mins

LM3658SD-A with USB_sel=low

I/O

V_IL

Low-Level Input Voltage

High-Level Input Voltage

EN_b

0.7

1.5

USB_sel

V_IH

EN_b

1.4

2.5

USB_sel

I_OL

I_OH

Low-Level Output Current

High-Level Output Current

STAT1, STAT2, output voltage = 0.25V

STAT1, STAT2, output voltage = 6.0V

µA

0.01

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BLOCK DIAGRAM

Body

Switcher

CHG_IN

BATT

Power

Supply

Body

Switcher

USBpwr

Current

Setting

Block

Voltage

References

and Thermo

Sensor

Iset

Current/Voltage

Control Loop with

GND

Voltage/Current Limits

LDO_on

USB_sel

BATT

TEMP

Iset

EOC

RESTART

TERM

FULL_RATE

Logic

and

STAT1

STAT2

Timers

EN_b

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Li-Ion Charging Profile

Battery Voltage

4.2V

4.0V

Battery

Current

3.0V

0.1C

50 mA

0.025C

Time

Pre-

qualification

Constant

Current

Constant Current

Constant Voltage

Maintenance

CHG

TOPOFF

PREQUAL

STAT1

STAT2

OFF

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LM3658 OPERATION DESCRIPTION

POWER-DOWN MODE

The LM3658 will power down automatically when the voltage on the USBpwr or CHG_IN pin drops below the

battery voltage with an amount that is equal to V_{OK_CHG}(V_BATT> V_CC- V_{OK_CHG}). Power-Down mode shuts off the

internal power FETs as well as the open-drain pull-down transistors on the status pins STAT1 and STAT2. The

only current consumed by the LM3658 is an ultra-low quiescent current of 1 µA typical.

POWER-ON RESET

As soon as the voltage of one of the power sources rises above V_BATT+ V_{OK_CHG}, the charger will wake up.

However, charging will not be initiated unless the supply voltage source exceeds the V_POR

AUTOMATIC POWER SOURCE DETECTION

When the voltage of one of the power sources exceeds the V_PORthreshold, the LM3658 detects which power

source is a valid charge supply. When both supply voltages are valid and present, CHG_IN will automatically be

selected over USBpwr. The USBpwr will be the designated power source only if no CHG_IN is present or when

the voltage on the CHG_IN pin is less than the battery voltage.

THERMAL POWER FET REGULATION

The internal power FETs are thermally regulated to the junction temperature of 120ºC to specify optimal charging

of the battery. At all times is the charge current limited by the I_SETresistor setting, the USB 100 mA/500 mA

selection, or the 100ºC junction temperature of the LM3658. The charge current is therefore a function of the

charge current settings, the thermal conductivity of the package and the ambient temperature as described in the

following equation:

120°C - T

K_ISET

R_ISET

]

= min [

or USB_sel or

CHG

(V - V

JA CC

)

BATT

Where T_Ais the ambient temperature and θ_JAis the thermal resistance of the package. Thermal regulation

specifies maximum charge current and superior charge rate without exceeding the power dissipation limits of the

LM3658.

PRE-QUALIFICATION MODE

During pre-qualification, STAT1 is on and STAT2 is off, and the charger supplies a constant current of 50 mA to

the battery. When the battery voltage reaches V_{FULL_RATE}, the charger transitions from pre-qualification to full-rate

charging. The pre-qualification mode aborts when the battery doesn’t reach V_{FULL_RATE}within the time allowed in

T_PREQUALtimer. In this event, charging stops and STAT1 and STAT2 will both be on, indicating a bad battery

condition.

CHG_IN FULL-RATE CHARGING MODE

The full-rate charge cycle is initiated following the successful completion of the pre-qualification mode. Timer

T_CHGstarts to count when the charger enters full-rate charging, with STAT1 on and STAT2 off. When charging

with an AC wall adapter, the full-rate charge current is proportional to the value of the resistor that is connected

to the I_SETpin as described in the following equation:

K_ISET

CHG

R_ISET

It is recommended to charge Li-Ion batteries at 1C rate, where “C” is the capacity of the battery. As an example,

it is recommended to charge a 750 mAh battery at 750 mA, or 1C. Charging at a higher rate can cause damage

to the battery.

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USBpwr FULL-RATE CHARGING MODE

The full-rate charge cycle is initiated following the successful completion of the pre-qualification mode. Timer

T_CHGstarts to count when the charger enters full-rate charging, with STAT1 on and STAT2 off. If the USB bus

provides the charger supply, then the default full-rate charge current is 100 mA max unless the USB_sel pin is

pulled high, which sets the charge current to 500 mA max.

CONSTANT-VOLTAGE CHARGING MODE AND END-OF-CHARGE (EOC) DETECTION

The battery voltage increases rapidly as a result of full-rate charging and will reach the 4.2V termination voltage,

triggering the constant-voltage charge cycle. Timer T_CHGcontinues to count in this cycle. STAT1 is on and

STAT2 is off. The charge current gradually decreases during constant-voltage charging until it reaches the End-

Of-Charge (EOC), which is equal to 10% of the full-rate current set either by the resistor connected to the I_SETpin

or the USB_sel pin. If Timer T_CHGtimes out before EOC is reached, charging stops and STAT1 and STAT2 will

both be on, indicating a bad battery condition.

TOP-OFF CHARGING MODE

Once EOC has been reached, a top-off cycle continues to charge the battery. Timed top-off cycle provides

optimal battery capacity following a complete charge cycle. During this cycle, charging terminates when I_CHG

reaches 2.5% of the full-rate charge current or when T_TOPOFFtimes out, whichever occurs first. STAT1 will turn

off and STAT2 will turn on once the top-off cycle completes successfully, indicating that charging is done.

MAINTENANCE MODE

Maintenance mode begins immediately after the charger successfully finishes the top-off cycle. In the

maintenance mode, the battery voltage is being monitored by the LM3658 continuously. If the battery voltage

drops 200 mV below V_TERM, a new full-rate charge cycle starts to replenish the battery. As this new full-rate

charge cycle begins, STAT1 will turn on and STAT2 will turn off, and all the timers will reset. Refer to the

LM3658 Flowchart.

CHARGE STATUS OUTPUTS

The LM3658 provides two open-drain outputs STAT1 and STAT2 that can be connected to external LEDs or to

General Purpose I/O’s (GPIO) of a peripheral IC. All charge status of the LM3658 is illustrated in Table 1. “ON”

means that STATx pin is pulled low as its pull-down transistor is turned on, representing a logic 0.

Table 1. Status Pins Summary

STAT1

OFF

STAT2

OFF

Condition

Power-Down, charging is suspended or

interrupted

OFF

Pre-qualification mode, CC and CV

charging, Top-off mode

OFF

Charge is completed

Bad battery (Safety timer expired), or LDO

mode

SAFETY TIMERS

In order to prevent endless charging of the battery, which can cause damage to the battery, there are three

safety timers that forcefully terminate charging if the charging mode is not completed within the time allowed.

Pre-Qualification Timer (T_PREQUAL

)

The pre-qualification timer starts with the initiation of the pre-qualification mode and allows 30 minutes to

transition from pre-qualification to full rate charging. If the battery voltage does not reach V_{FULL_RATE}in 30

minutes, charging stops and status pins STAT1 and STAT2 both turn on to indicate a bad battery status.

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Charger Timer (T_CHG

)

The charge timer starts with the initiation of full-rate charging and has a duration of 5 hours for the LM3658. If the

charge current does not reach EOC, charging stops and STAT1 and STAT2 both turn on to indicate a bad

battery status. Once the charge control declares a bad battery, removing the input source is the only means to

clear the bad battery status.

Top-Off Timer (T_TOPOFF

)

Once the charger successfully completes constant current constant voltage charging, it enters top-off mode and

starts T_TOPOFFtimer. Topoff lasts 30 minutes for the LM3658. During top-off, charging stops when T_TOPOFF

reaches its count or when I_CHGreaches 2.5% of the full-rate charge current. There is no time-out condition in top-

off mode.

When charging is interrupted either by battery temperature out of range or disabling the LM3658, the applicable

safety timer will store its count value for the duration of the interruption and subsequently resumes counting from

its stored count value when charging continues, only if the charger resumes to the same operation mode it was

in before the interrupt.

The LM3658SD-A version has selectable timers for T_CHGand T_TOPOFF. Based on the logic level applied to the

USB_sel pin, timers can be chosen as follow:

Input

USB_SEL

Low

T_PREQUAL

T_CHG

T_TOPOFF

CHG_IN

USBpwr

30 minutes

10 hours

5 hours

10 hours

5 hours

60 minutes

30 minutes

60 minutes

30 minutes

High

Low

High

BATTERY TEMPERATURE MONITORING (SUSPEND MODE)

The LM3658 is equipped with a battery thermistor interface to continuously monitor the battery temperature by

measuring the voltage between the T_Spin and ground. Charging is allowed only if the battery temperature is

within the acceptable temperature range set by a pair of internal comparators inside the LM3658. If the battery

temperature is out of range, STAT1 and STAT2 both turn off and charging is suspended. Timer holds its count

value.

The TS pin is only active during charging and draws no current from the battery when no external power source

is present.

If the TS pin is not used in the application, it should be connected to GND through 10kΩ pulldown resistor.

When the TS pin is left floating (battery removal), then the charger will be disabled as the TS voltage exceeds

the upper temperature limit.

ntc

hiRef

loRef

Logic

charger

control

The LM3658 battery temperature feature is tailored to use negative temperature coefficient (NTC) 103AT

thermistors with 10kΩ impedance. If alternative thermistors need to be used in the system, supplemental external

resistors are needed to create a circuit with equivalent impedance.

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ntc

hiRef

Logic

charger

control

loRef

DISABLING CHARGER (CHARGE INTERRUPT MODE)

Charging can be safely interrupted by pulling the EN_b pin high and charging can resume upon pulling the EN_b

pin low. The enable pin can be permanently tied to GND with no extra current consumption penalty during power

down mode. When the charger is disabled, timer holds its count value, and STAT1 and STAT2 are both off.

LDO MODE (AVAILABLE ONLY IN LM3658SD-B VERSION)

The LM3658SD-B version enters LDO mode when the T_spin is floating and AC wall adapter is still connected to

CHG_IN pin. In LDO mode, STAT1 and STAT2 are both on. The LM3658SD-B becomes a linear regulator

capable of delivering 1A of source current. Normally the T_spin is connected to the thermistor from the battery

pack for temperature monitoring purpose. If this pin is disconnected, the LM3658SD-B assumes that there is no

battery present and will automatically invoke the LDO mode. LDO mode allows applications to operate without a

battery provided that the AC wall adapter supplies power to the CHG_IN pin. The LDO mode is not possible in

USB mode.

For the other versions of the LM3658, floating the T_spin does not invoke LDO mode. Instead, it will go to

suspend mode. Please refer to “ Battery Temperature Monitoring” section for more detail.

5 HOUR/ 10 HOUR SELECTABLE TIMER (AVAILABLE ONLY IN LM3658SD-A VERSION)

The LM3658SD-A allows the user to select between 5 hour or 10 hour timer based on the polarity of the

USB_sel pin, in both CHG_IN mode and USBpwr mode. By pulling the USB_sel pin high, the timer is set to 5

hours. In the USBpwr mode, the polarity of the USB_sel pin determines the charge current as well as the timer.

In CHG_IN mode, the polarity of the USB_sel pin determines only the timer. The charge current is set by the

resistor at I_setpin.

INPUT/OUTPUT BYPASS CAPACITORS

Care should be taken to support the stability of the charge system by connecting a 1 µF capacitor as close as

possible to the BATT pin. An input capacitor ranging from 1.0 µF– 10.0 µF must be connected to the CHG_IN

and USBpwr input pins. Low cost ceramic capacitors can be selected.

THERMAL PERFORMANCE OF THE WSON PACKAGE

The LM3658 is a monolithic device with integrated power FETs. For that reason, it is important to pay special

attention to the thermal impedance of the WSON package and to the PCB layout rules in order to maximize

power dissipation of the WSON package.

The WSON package is designed for enhanced thermal performance and features an exposed die attach pad at

the bottom center of the package that creates a direct path to the PCB for maximum power dissipation.

Compared to the traditional leaded packages where the die attach pad is embedded inside the molding

compound, the WSON reduces one layer in the thermal path.

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LM3658

SNVS328E –MAY 2005–REVISED MARCH 2007

www.ti.com

The thermal advantage of the WSON package is fully realized only when the exposed die attach pad is soldered

down to a thermal land on the PCB board with thermal vias planted underneath the thermal land. Based on

thermal analysis of the WSON package, the junction-to-ambient thermal resistance (θ_JA) can be improved by a

factor of two when the die attach pad of the WSON package is soldered directly onto the PCB with thermal land

and thermal vias, as opposed to an alternative with no direct soldering to a thermal land. Typical pitch and outer

diameter for thermal vias are 1.27 mm and 0.33 mm respectively. Typical copper via barrel plating is 1 oz,

although thicker copper may be used to further improve thermal performance. The LM3658 die attach pad is

connected to the substrate of the IC and therefore, the thermal land and vias on the PCB board need to be

connected to ground (GND pin).

For more information on board layout techniques, refer to Application Note 1187 (SNOA401) “Leadless Lead

Frame Package (LLP).” This application note also discusses package handling, solder stencil and the assembly

process.

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LM3658

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SNVS328E –MAY 2005–REVISED MARCH 2007

LM3658 FLOWCHARTS

Suspend Mode

From any mode except

POR and Powerdown

If Ts pin is not in desired

range, LM3658 enters

Suspend mode. Timer stops.

LDO mode

From any mode (except POR &

power down)

If Ts pin is floating, LM3658 goes to

Powerdown Mode

the LDO mode after 300 msec

deglitch

+ V

Ts pin

out of window

Yes

Ts pin

Is floating

Yes

BATT

Yes

POR Mode

Yes

POR

Yes

CHG_IN

present

USBpwr

present

Yes

Charge Interrupt

Mode

CHG_IN Mode

USBpwr Mode

Timer stops

En_b

low

Yes

Bad Battery Mode

Disconnect power

Source to restart

Charger.

Maintenance Mode

Yes

BATT

RESTART

Figure 2. LM3658 Flowchart

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LM3658

SNVS328E –MAY 2005–REVISED MARCH 2007

www.ti.com

USBpwr

Topoff Mode

CCCV Mode

CHG_IN

present

CHG_IN

present

Yes

Go to

POR

Go to

POR

USBpwr Mode

USB_SEL is

High

USB_SEL is

High

Set Ichg =

500 mA

Set Ichg =

500 mA

Set

Ichg=100

SetIchg=

100 mA

Prequalification

Mode

Maintenance Mode

Go to

Charger

Interrupt

Mode

Go to

Charger

Interrupt

Mode

CHG_IN

present

Yes

Go to

POR

En_b

High

En_b

High

Yes

Go to

Bad

Battery

Mode

Charger

Interrupt

Mode

En_b

High

BATT

CHG

Go to

POR

RESTART

expire

Go to

Bad

Battery

Mode

BATT

Yes

PREQUAL

expire

TOPOFF

expire

FULL_RATE

BATT

CHG

EOC

Yes

FULL_RATE

detected

TOPOFF

Figure 3. LM3658 USBpwr Mode Flowchart

CHG_IN Mode

CHG_IN

Prequalification

Mode

CHG_IN

Topoff Mode

Maintenance Mode

CCCV Mode

Go to

Charger

Interrupt

Mode

Go to

Charger

Interrupt

Mode

Charger

Interrupt

Mode

En_b

High

En_b

High

En_b

High

Yes

Go to

Bad

Battery

Mode

Go to

Bad

Battery

Mode

BATT

Go to

POR

CHG

expire

PREQUAL

expire

RESTART

BATT

Yes

TOPOFF

expire

FULL_RATE

CHG

EOC

Yes

detected

TOPOFF

Figure 4. LM3658 CHG_IN Mode Flowchart

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PACKAGE OPTION ADDENDUM

www.ti.com

1-Nov-2013

PACKAGING INFORMATION

Orderable Device

Status Package Type Package Pins Package

Eco Plan

Lead/Ball Finish

MSL Peak Temp

Op Temp (°C)

Device Marking

Samples

Drawing

Qty

1000

(1)

(2)

(6)

(3)

(4/5)

LM3658SD

NRND

ACTIVE

WSON

DSC

TBD

Call TI

CU SN

Call TI

-40 to 85

L111B

LM3658SD-A/NOPB

DSC

Green (RoHS

& no Sb/Br)

Level-1-260C-UNLIM

L155B

L156B

L111B

L155B

L156B

L111B

LM3658SD-B/NOPB

LM3658SD/NOPB

ACTIVE

WSON

DSC

1000

4500

Green (RoHS

& no Sb/Br)

CU SN

Level-1-260C-UNLIM

-40 to 85

Green (RoHS

& no Sb/Br)

LM3658SDX-A/NOPB

LM3658SDX-B/NOPB

LM3658SDX/NOPB

Green (RoHS

& no Sb/Br)

Green (RoHS

& no Sb/Br)

Green (RoHS

& no Sb/Br)

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

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.

⁽²⁾Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability

information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight

in homogeneous material)

⁽³⁾MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

⁽⁴⁾There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

1-Nov-2013

⁽⁵⁾Multiple Device Markings will be inside parentheses. Only one Device 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 Device Marking for that device.

⁽⁶⁾Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish

value exceeds the maximum column width.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 2

PACKAGE MATERIALS INFORMATION

www.ti.com

11-Oct-2013

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device

Package Package Pins

Type Drawing

SPQ

Reel

Pin1

Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant

(mm) W1 (mm)

LM3658SD

WSON

DSC

1000

4500

178.0

330.0

12.4

3.3

1.0

8.0

12.0

LM3658SD-A/NOPB

LM3658SD-B/NOPB

LM3658SD/NOPB

LM3658SDX-A/NOPB

LM3658SDX-B/NOPB

LM3658SDX/NOPB

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

11-Oct-2013

*All dimensions are nominal

Device

Package Type Package Drawing Pins

SPQ

Length (mm) Width (mm) Height (mm)

LM3658SD

WSON

DSC

1000

4500

210.0

367.0

185.0

367.0

35.0

LM3658SD-A/NOPB

LM3658SD-B/NOPB

LM3658SD/NOPB

LM3658SDX-A/NOPB

LM3658SDX-B/NOPB

LM3658SDX/NOPB

Pack Materials-Page 2

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

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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms

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LM3658SD-A [TI]

相关型号：

LM3658SD-A/NOPB

LM3658SD-B

LM3658SD-B/NOPB

LM3658SD/NOPB

LM3658SDX

LM3658SDX

LM3658SDX-A

LM3658SDX-A/NOPB

LM3658SDX-B

LM3658SDX-B/NOPB

LM3658SDX/NOPB

LM3661