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产品型号AUR9807的Datasheet PDF文件预览

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

General Description

Features

•

QFN Package

The AUR9807 is a single-cell Li-ion charger IC with

system power management feature. It charges the

battery and power the system simultaneously. The

maximum charging current (up to 1.5A) is set by

external resistor for fast charging. The output

voltage for the system is regulated to a nominal

value (three different versions available: 4.4V, 5V or

6V); the actual value of the output voltage depends

on the input voltage from the adapter, the charging

current and the system loading. With the decrease of

the input voltage or the increase of the system

loading current, the output voltage drops. When the

output voltage drops to a predetermined value

(V_APM-REG), the Active Power Management function

is activated and tries to maintain the output voltage

at V_APM-REG; the AUR9807 will suffice the system

loading with first priority and reduce the charging

current temporarily, i.e. under heavy load condition,

the AUR9807 charges the battery with the remaining

Active Power Management (APM) for

Simultaneously Powering the System and

Charging the Battery

Total Current Supported Up to 2 Amperes

(System Loading Having Higher Priority on the

Budget)

Automatic Power Source Selection (AC Adapter

or Battery)

40mΩ Power Path for the Battery to Supply the

System Power Efficiently

Junction Temperature Detection and Thermal

Regulation During Charging Process

External LED Indicating Charger and Power

Good Status as Well as Fault Condition

Thermal, Short-Circuit, and Reverse Current

Protection

Short-Circuit Protection in the Low Power

Consumption Sleep Mode

SYSOFF Function to Cut Off the Path Between

the System and the Battery

•

available current to keep the output voltage at V_APM

In this manner, the charge and discharge cycle of the

battery can be reduced.

Built-in Over Voltage Protection up to 18V

It is possible that the AUR9807 fails to maintain the

output voltage at V_APM-REG; for example, when the

system loading current exceeds the capability of the

current-limiting AC adapter. In this scenario, the

output voltage drops to the battery voltage, and the

system is allowed to draw current from the battery.

Applications

•

Battery-Powered Devices or Equipment

Mobile Phones, Digital Cameras and MP3

Players

•

Radios, Other Hand-Held Games and Instruments

Solar Power System

The AUR9807 is available in QFN-4.5×3.5-20

package.

QFN-4.5×3.5-20

Figure 1. Package Type of AUR9807

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www.diodes.com

October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Pin Configuration

D Package

(QFN-4.5×3.5-20)

Pin 1 Mark

STAT1

GND

STAT2

/PG

OUT

BAT

Exposed

Pad

ISET2

MODE

TMR

APM

12 TS

Figure 2. Pin Configuration of AUR9807 (Top View)

2 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Pin Description

Pin Number I/O Pin Name

Function

Internal reference; VREF output capacitor not required, but

one with a value of 0.1μF is recommended.

VREF

STAT1

STAT2

Charge status flag 1 (open-drain)

Charge status flag 2 (open-drain)

Chip input voltage

Battery connection; charging or discharging all through this

USB mode total current selection (High=450mA, Low=

90mA) and AC mode charge current selection (High=Full

current, Low=half current)

5 , 6

I/O

BAT

ISET2

MODE

Set AUR9807 in AC(High) or USB(Low) mode

Chip enable (active high)

I/O

ISET1

SYSOFF

Set the maximum charging current

Cut off the power path between the battery and the output pin

Battery Temperature sensing

I/O

Active Power Management set point ※ no need for

capacitors

Timer program by external resistor connected to this pin.

Tying TMR and VREF together to disable the safety timer

APM

TMR

I/O

15 , 16 , 17

OUT

/PG

System output

Power-good status flag (open-drain)

Chip Ground

19 , 20

GND

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Functional Block Diagram

3.3V

VREF

OUT

Short-Circuit

Recovery

15, 16, 17

V_OUT

UVLO

I_SENSE

Power Source

Selection

ISET1

BAT

V_I(ISET1)

V_ISENSE

100mA

500mA

V_SET

5, 6

V_BAT

V_OUT

V_OUT(REG)

SYSOFF

GND

V_BAT

V_BAT(REG)

19, 20

V_I(ISET1)

V_SET

V_APM

TMR

APM

Oscillator

T_J

T_J(REG)

V_BAT

V_OUT

I_AMP

I_TS

V_HTF

AC Charge Enable

BAT Charge Enable

500mA/100mA

Thermal

Shutdown

V_LTF

Fast Precharge

Power Source Selection

1C - 500mA

C/S - 100mA

Charge

Control Timer

and Display

Logic

MODE

ISET2

/PG

V_BAT

V_RCH

Recharge

STAT1

STAT2

V_BAT

V_LOWV

Precharge

Termation

Sleep

V_I(ISET1)

V_TERM

V_BAT

V_IN

Figure 3. Functional Block Diagram of AUR9807

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Ordering Information

AUR9807

Circuit Type

D: QFN-4.5x3.5-20

Output Voltage

VF: 4.4V, CV Mode

DF: 4.4V, Done

VI: 5V, CV Mode

DI: 5V, Done

G: Green

VS: 6V, CV Mode

DS: 6V, Done

CV mode: After charge done, charger will stay in constant

voltage mode until time out.

Done: After charge done, charger will shut down until the

battery voltage drops below the battery recharge threshold.

Temperature

Packing

Type

Package

Output Voltage

Part Number

Marking ID

Range

4.4V, CV Mode

4.4V, Done

5V, CV Mode

5V, Done

AUR9807VFGD

AUR9807DFGD

AUR9807VIGD

AUR9807DIGD

AUR9807VSGD

AUR9807DSGD

A9807VFG

A9807DFG

A9807VIG

A9807DIG

A9807VSG

A9807DSG

Tape & Reel

QFN-4.5x3.5-20

-40 to 85C

6V, CV Mode

6V, Done

BCD Semiconductor's Pb-free products, as designated with "G" in the part number, are RoHS compliant and

green.

5 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Absolute Maximum Ratings (Note 1)

Parameter

Symbol

Value

Unit

Supply Input Voltage

V_IN

-0.3 to 18

V_BAT, V_CE, V_APM, V_/PG

V_MODE, V_OUT, V_ISET1

V_ISET2, V_STAT1, V_STAT2

V_TS

-0.3 to 7

Input Voltage

V_REF

V_TMR

I_IN

-0.3 to V_OUT+0.3

Input Current

3.5

I_OUT

I_BAT

Output Current

-4 to 1.5

Output Source Current

(In Regulation at 3.3V V_REF

I_REF

I_/PG, I_STAT1, I_STAT2

_JA

)

Output Sink Current

Thermal Resistance

(Junction to Ambient)

°C/W

Storage Temperature

Junction Temperature

T_STG

T_J

-65 to 150

-40 to 150

°C

Lead Temperature

(Soldering, 10 Seconds)

300

°C

ESD (Human Body Model)

ESD (Machine Model)

V_HBM

V_MM

2000

200

Note 1: Stresses greater than 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 Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions

Parameter

Supply Voltage

Input Current

Symbol

Min

Max

Unit

AUR9807DSGD, AUR9807VSGD

4.35

6.3

V_IN

AUR9807DFGD,AUR9807VFGD,

AUR9807DIGD, AUR9807VIGD

4.35

-40

5.5

I_IN

Operating Junction Temperature Range

T_OP

125

°C

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Electrical Characteristics

T_A=25^oC, V_INis within the recommended range, unless otherwise specified.

Parameter

Symbol

Test Condition

Min Typ Max Unit

Active Supply Current

I_IN(SPLY)

V_IN>4.35V

V_IN<V_BAT

2.6V<V_BAT<V_BAT(REG)

No load at OUT pin

1.1

Sleep Mode Current into

BAT Pin

I_BAT(SLP)

2.5

μA

V_IN<6V, Total current flow

into IN pin with CE pin

low; no load

Input

Current

Standby

I_IN(STDBY)

200

μA

Total current flow into

BAT Pin Standby Current

I_BAT(STDBY)BAT pin with input source

present and CE pin low

Current flows into BAT

pin after the termination of

the charging process

Charge Done Current,

BAT

I_BAT(TERM)

Q1,Q2 DROP-OUT VOLTAGE

IN to OUT Dropout

Voltage

BAT to OUT Dropout

Voltage

V_DO(IN-OUT)MODE=High , I_IN=1A

V_DO(BAT-OUT)V_BAT> 4V , I_BAT=1A

300

475

100

VOLTAGE REGULATION

Regulation V_OUT

9807VF 9807DF

Regulation V_OUT

9807VI 9807DI

Regulation V_OUT

9807VS 9807DS

V_OUT(REG)

V_IN>4.4V+V_DO(IN-OUT)

V_IN>5V+V_DO(IN-OUT)

V_IN>6V+V_DO(IN-OUT)

4.4

4.9

4.5

5.1

6.3

APM REGULATION

APM Set Point

V_APM-SET

I_APM-SET

V_APM-SET<V_OUT

2.6

3.8

APM Current Source

APM Scale Factor

Input present

100

105

μA

V_APM-REG=V_APM-SETx SF

1.139 1.15 1.162

BATTERY SUPPLEMENT MODE

V_OUT

Run Battery Supplement

Mode

V_BSUP1

V_BAT>2V

V_BAT–

60mV

V_OUT

Escape

Battery

V_BSUP2

V_BAT–

Supplement Mode

20mV

CHARGING-PRECHARGE

Precharge to Fast-charge

Transition Voltage

V_LOWV

I_PRECHG

Voltage on BAT

2.9

3.1

Precharge Current Range

150

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Electrical Characteristics (Continued)

T_A=25^oC, V_INis within the recommended range, unless otherwise specified.

Parameter

Symbol

Test Condition

Min Typ Max Unit

Precharge Set Voltage

V_PRECHG

225

250

275

t_FALL=100ns,

10mV overdrive,

De-glitch Time Between

Fast

Charge

and

t_DGLF

22.5

V_BAT

decreasing

below

Precharge Transition

threshold

CHARGING-CURRENT REGULATION

Fast Charge Current

Range

I_CHG

R_PBAT

V_SET

V_BAT>V_LOWV, Mode=High

100

2.4

1000 1500

1000

BAT to OUT Pull-up

V_BAT<1V

Battery Charge Current

Set Voltage⁽¹⁾

Voltage on ISET1

2.5

2.6

100mA<I_CHG<1.5A

10mA<I_CHG<100mA

375

300

425

450

600

Charge

Factor

Current

Set

K_SET

USB MODE INPUT CURRENT LIMIT

ISET2=High

ISET2=Low

400

500

100

USB Input Current Range

I_USB

CHARGING VOLTAGE REGULATION

Battery-charge-voltage

4.2

V_BAT(REG)T_A=25°C

-0.5

-1

0.5

Battery Charge Voltage

Regulation Accuracy

CHARGE TERMINATION DETECTION

V_BAT>V_RCH

I_TERM=(K_SETx V_TERM)/

R_SET

Charge Done Detection

Current

I_TERM

150

V_BAT>V_RCH, Mode=High

V_BAT>V_RCH, Mode=Low

230

250

100

270

130

Charge Done Set Voltage,

Measured on ISET1

V_TERM

TEMPERATURE SENSE COMPARATORS

High

Temperature Threshold

Low Voltage High

Temperature Threshold

Current Source for

Temperature Sense

Voltage,

Low

V_LTF

V_HTF

I_TS

Temp fault at V_TS>V_LTF

Temp fault at V_TS<V_HTF

2.5

0.5

100

105

μA

BATTERY RECHARGE THRESHOLD

V_BAT(REV_BAT(REV_BAT(RE

Recharge

Voltage

Threshold

V_RCH

-0.125 -0.1 -0.075

(1) For half-charge rate, V_SETis 1.25V.

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Electrical Characteristics (Continued)

T_A=25^oC, V_INis within the recommended range, unless otherwise specified.

Parameter

Symbol

Test Condition

Min Typ Max Unit

STAT1, STAT2, AND /PG

I_OL=5mA,

external pull-up resistor>

1kΩ

requiring

Low-level

Saturation Voltage

Output

V_OL

I_LKG

0.25

Input Leakage Current

μA

ISET2, CE

t_CE-HLDOF

CE Pin Hold-off Time

CE fall low only

Low-level Input Voltage

High-level Input Voltage

V_IL

1.1

V_IH

I_IL1

1.5

CE Pin

Low-level Input Current

CE Pin

High-level Input Current

ISET2 Pin

Low-level Input Current

ISET2 Pin

High-level Input Current

-1

I_IH1

I_IL2

I_IH2

μA

V_ISET2=0.4V

V_ISET2=V_IN

-20

MODE

Falling Hi→Low;

280kΩ±10% applied when 0.975

low

Mode Pin

Low-level Input Voltage

V_IL

1.025

Mode Pin

High-level Input Voltage

Mode Pin

Low-level Input Current

Input R_MODEsets external V_IL+

V_IL+

0.024

V_IH

I_IL

hysteresis

0.01

-1

μA

TIMERS

Timer Set Factor

External Resistor Limits

K_TMR

R_TMR

t_CHG=K_TMRx R_TMR

0.313 0.36 0.414

30 100

s/Ω

kΩ

0.115 0.125 0.135

Precharge Timer

t_PRECHG

R_FAULT

K_EXT1

t_CHG

Timer Fault Recovery

Pull-up from OUT to BAT

kΩ

The actual charge current less

than 50% of maximum fast

charge current

Time

Out

Extension

Factor1

The actual charge current less

than 25% of maximum fast

charge current

Time

Factor2

Out

Extension

K_EXT2

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Electrical Characteristics (Continued)

T_A=25^oC, V_INis within the recommended range, unless otherwise specified.

Parameter

Symbol

Test Condition

Min

Typ Max Unit

CHARGER SLEEP THRESHOLDS

Sleep-mode

Threshold

Sleep-mode

Threshold

Entry

V_BAT

+0.125

V_SLPENT

V_SLPEXIT

Exit

V_BAT

+0.195

DE-GLITCH TIME

De-glitch Time

Charge Done Detection,

for

Temperature

Recharge

Mode Detection

Fault,

Sleep

t_DEG

18.75

150

and

START-UP CONTROL BOOT-UP

On the first application

of input low

Boot-up Time t_BOOT-UP

120

180

SWITCHING POWER SOURCE TIMING

When input applied.

Measure from: [/PG: Lo

→ Hi to I_IN>5 mA ]

Switching Power Source

from Input to Battery

t_SW-BAT

μs

THERMAL SHUTDOWN REGULATION

Temperature Trip

T_SHTDWN

T_J(REG)

V_UVLO

T_J(Q1 and Q3 only)

150

Thermal Hysteresis

°C

Temperature Regulation

Limit

T_J(Q2)

110

2.45

130

2.65

130

UVLO

Under-voltage Lockout

Decreasing V_IN

2.5

Input power detected

when

V_IN>V_BAT+ V_IN(DT)

V_BAT=3.6V

Input Power Detection

Threshold

V_IN(DT)

V_IN: 3.5V → 4V

Hysteresis

VREF OUTPUT

Output

Voltage

Regulation

Active only if ADP or

USB is present

V_REF

3.3

Regulation Accuracy

Output Current

-5

Ω

I_REF

R_DS(ON)

C_OUT

On Resistance

OUT to VREF

Output Capacitance

μF

10 of 23

www.diodes.com

October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Electrical Characteristics (Continued)

T_A=25^oC, V_INis within the recommended range, unless otherwise specified.

SHORT CIRCUIT PROTECTION

Pull-up source from

Short-circuit

Between BAT to OUT

Recovery

BAT to OUT for

short-circuit recovery

V_OUT<V_BAT–200mV

I_OSH1

IN to OUT Short-circuit

Protection

R_SHAC

V_OUT<1V

500

Output

Short-circuit

Threshold,

V_IN>V_UVLOand

V_IN>V_BAT+ V_IN(DT)

Detection

Power-on

Output

V_OUT(SC1)

0.9

1.1

Short-circuit

Threshold,

Detection

Supplement mode

(V_BAT– V_OUT)>V_OUT(SC2)

Indicates Short-circuit

Deglitch

Supplement Mode Short

Circuit

V_OUT(SC2)

V_BAT>2.5V

160

200

512

240

Time,

t_DGL(SC2)

μs

Maximum Short-current

for V_BAT>V_OUT

(2)

I_SHORT

V_BAT>2.5V

(2) For short current>I_SHORT, short-protection may not work due to avalanche breakdown phenomenon.

Typical Performance Characteristics

Figure 4. Output Voltage vs. Output Current

Figure 5. Output Voltage vs. Charge Current

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Typical Performance Characteristics (Continued)

V_OUT

2V/div

V_IN

2V/div

I_CHG

0.5A/div

Time 20ms/div

Figure 6. Charge Current vs. Input Voltage

Figure 7. Power On

V_IN

2V/div

V_OUT

2V/div

V_IN

2V/div

I_CHG

0.5A/div

I_CHG

1A/div

V_MODE

2V/div

V_SYSOFF

2V/div

Time 1ms/div

Time 200s/div

Figure 8. SYSOFF Floating

Figure 9. MODE Pin Pull Low

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Typical Performance Characteristics (Continued)

V_IN

2V/div

V_OUT

V_IN

2V/div

V_OUT

2V/div

I_CHG

0.5A/div

I_CHG

0.5A/div

V_ISET2

2V/div

Time 40s/div

Time 400s/div

Figure 10. ISET2 Pin Pull High

Figure 11. ISET2 Pin Pull Low

V_IN

2V/div

V_OUT

2V/div

I_CHG

0.5A/div

V_MODE

2V/div

Time 40s/div

Figure 12. MODE Pin Pull High

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Power Flow

AC Adapter (or USB)

OUT

BAT

System

VDC

40mΩ

AUR9807

The AUR9807 selects the power source automatically.

In the absence of the input source (AC adapter or USB),

the battery is chosen to power the system. Under this

circumstance, the AUR9807 consumes less than 5μ

Ampere; the power path resistance from the battery to

the system is only 40mΩ ⁽³⁾; all these guarantee a high

efficiency and elongate the battery discharge time. With

this stringent sleep current budget (<5μA), the

AUR9807 is still able to detect an output short

condition and cuts off the power path between the

battery and the system under short condition.

directly, current limiting phenomenon occurs through

Adaptive Power Management in response to the output

voltage drop. The resistor connected to ISET1 pin sets

the maximum charging current. This maximum

charging current can be halved by pulling down the

ISET2 pin. In USB mode, the AUR9807 will limit the

total current within 450mA (ISET2=High) or 90mA

(ISET2=Low). The maximum charging current is still

set by the resistor connected to ISET1 pin; however,

because of this current limiting feature, the actual

charging current is usually less than 450mA (or 90mA).

With the input power present, the MODE pin sets the

AUR9807 in adapter mode or USB mode. In adapter

mode, the AUR9807 does not limit the total current

(3) Q2 design value is 40mΩ.

Power Source Selection and Charge Current Setting

MODE Pin

Level

Loading Power

Source

AC Adapter

Charge Current Setting

Yes

USB

Battery

ISET1, limitation depends on ISET2 setting

Low

High

N/A

AC Adapter

Battery

ISET1, half charging rate by setting ISET2 to low

N/A

14 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Charge Function Descriptions

Charge Flow

Charge current = I_CHG

Current

Voltage

V_BAT= 4.2V

V_BAT=Recharge threshold

V_BAT=3V

Charge Current = 0.1 x I_CHG

Charge Done

Timer Timeout

Time

Precharge

Constant Current

Phase

Constant Voltage

Phase

Charge

Done

Recharge

Process

Pre-charge and Charge Done

Current Setting

Maximum Charging Current Setting

I_CHG,max

I_PRECHG



;

_SETK_SET

R_SET

I_CHG



, V

 2.5

1.25

 2.5

MODE=High ISET2=High

MODE=High ISET2=Low

SET,max

I_CHG,max

I_TERM



;ACMode

I_CHG,max

I_PRECHG



V_SETK_SET

, V

SET,max

R_SET

I_CHG,max

I_TERM



;ACMode

I_CHG,max

I_PRECHG



V_SETK_SET

ISET2=High/L

, V

MODE=Low

SET,max

R_SET

I_CHG,max

I_TERM



;USBMode

15 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Charge Function Descriptions (Continued)

The maximum charging current, the pre-charge

current and charge done current setting are given in

the above table. The charging process begins with a

pre-charge phase; when the battery voltage reaches

the pre-charge threshold V_LOWV, the charger enters

the constant current mode. At this stage, the charger

tries to charge the battery with the maximum

charging current (a constant); however, the actual

charging current may be lower due to Active Power

Management activated by large system loading or

insufficient input current capability. The thermal

fold-back mechanism also reduces the actual

charging current when the junction temperature is

over 110°C. The battery voltage rises gradually with

the constant current entering the battery.

current setting, nominally the charging process is

complete (this can be observed from the external

indicator). Depending on different versions, after the

charge done status indicated, the charger will stop

providing charging current completely or stay in

constant voltage mode till time out. When the battery

voltage drops below the recharge threshold, a new

charge cycle begins.

Example:

With a R_SET=1kΩ, the maximum charging current is

about 1A for ISET2=High and 0.5A for ISET2=Low.

The pre-charge current I_PRECHGis 100mA. The charge

done current setting is 100mA for AC mode and

40mA for USB mode. Note the absolute values of

pre-charge current and charge done current setting do

not vary with ISET2.

When the battery voltage reaches V_BAT(REG), the

charger enters the constant voltage mode. At this

stage, the charger keeps the battery voltage at

V_BAT(REG)with a decreasing charging current. When

the charging current drops below the charge done

Power Source Selecting

AC Adapter

VDC

OUT

System

40mΩ

BAT

AUR9807

V_IN<V_BAT: V_OUT=V_BAT–V_DO(BAT-OUT)

ii.

iii.

iv.

V_BAT<V_IN<V_OUT(REG): V_OUT=V_IN–V_DO(IN-OUT)

V_OUT(REG)+V_DO(IN-OUT)<V_IN<6V: V_OUT=V_OUT(REG)

6V<V_IN: V_OUT=V_BAT–V_DO(BAT-OUT)

The AUR9807 selects power source automatically

depending on the voltage present at the input. When

V_INis lower than V_BAT, the battery is responsible to

the output voltage V_OUTis V_IN–V_DO(IN-OUT); when V_IN

is high enough, which means that V_IN>(V_OUT(REG)

V_DO(IN-OUT)), the output voltage is regulated at

V_OUT(REG). When the input voltage V_INis higher than

6V, the current path between IN and OUT is cut off to

protect the chip; AUR9807 therefore selects the

Battery as the power source; the output voltage V_OUT

power the system. The output voltage V_OUTis V_BAT

–

V_DO(BAT-OUT). When the input voltage V_INis higher

than V_BATand lower than 6V, the input source is used

to supply the system power; the output voltage

depends on V_IN. When V_INis lower than V_OUT(REG)

is then V_BAT–V_DO(BAT-OUT).

16 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Charge Function Descriptions (Continued)

When the output voltage is higher than V_APM-REG, the

input source is capable of providing the charging

current (set by R_SET) and output current (determined by

system loading) simultaneously. When the output

voltage goes down and reaches V_APM-REGdue to an

increasing loading, AUR9807 starts to reduce the

charging current and tries to keep the output voltage at

V_APM-REG. Because AUR9807 uses the remaining

available current to charge the battery, the charging

current can be estimated as I_{supply max}– I_OUT. In AC mode,

the I_{supply max}is determined by the driving capability of

the AC adapter and AUR9807 itself (usually the

limiting factor is the AUR9807, and I_{supply max}is about

2A). The I_{supply max}is determined by the ISET2 setting in

USB mode (I_{supply max}is about 450mA with ISET2 high,

and I_{supply max}is about 90mA with ISET2 low).

Active Power Management (APM)



AC MODE (MODE=HIGH)

V_APM-REG<V_OUT: Normal Mode; I_CHGdetermined

by R_SET

ii.

V_BAT<V_OUT<V_APM-REG: APM mode ; I_CHG= I_supply

_max–I_OUT

iii. V_OUT<V_BAT: BAT supply mode



USB 500 MODE (MODE=LOW ,

ISET2=HIGH)

V_APM-REG<V_OUT: Normal Mode; I_CHGdetermined

by R_SET

ii.

V_BAT<V_OUT<V_APM-REG: APM mode; I_CHG=

450mA – I_OUT

iii. V_OUT<V_BAT: BAT supply mode



USB 100 MODE (MODE=LOW ,

ISET2=LOW)

i. V_APM-REG<V_OUT: Normal Mode; I_CHGdetermined

by R_SET

When the loading current keeps increasing and exceeds

I_{supply max}, the AUR9807 can not prevent the output

voltage dropping below V_APM-REGeven the charging

current is reduced to zero. When the output voltage

drops below the battery voltage, the battery helps to

supply the loading current and keeps the output voltage

roughly at V_BAT. At this situation, we have:

ii.

V_BAT<V_OUT<V_APM-REG: APM mode; I_CHG=

90mA–I_OUT

iii. V_OUT<V_BAT: BAT supply mode

The active power management feature adjusts the

charging current to resist the output voltage drop due to

heavy system loading or insufficient input driving

capability. In the extreme situation, the charging current

flow would be reversed (the battery helps to supply the

system power). The active power management

regulation voltage V_APM-REGis given by:

(5)

I_OUT= I_{supply max}+I_BAT

(4) R_APM<38kΩ: V_APM-REG=I_APM-SET×R_APM×SF

R_APM>41kΩ: The V_APM-REGis set to

predetermined fixed value (4.26V)

(5) I_BAT=(V_BAT–V_OUT) / (40mΩ Power Path

Resistance)

V_APM-REG= I_APM-SET×R_APM× SF⁽⁴⁾

Battery Temperature Protection

AUR9807

BAT

Li Battery

1µF

100µA

V_HTF

NTC

V_LTF

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Charge Function Descriptions (Continued)

The AUR9807 interrupts the charging process when the

battery temperature is out of normal range. It provides a

100μA sensing current to the negative-temperature

coefficient resistor (on the battery side) through the TS

pin. The battery protection is achieved by constantly

monitoring the voltage at the TS pin. When this voltage

is higher than V_LTF(nominally 2.5V) or lower than

V_HTF(nominally 0.5V), an under-temperature or

over-temperature condition is detected. For an usual

103AT-type NTC resistor, the corresponding

temperature range is between 0°C and 45°C. The

normal battery temperature range can be modified by

adjusting the NTC resistor or by adding extra resistor

Once the abnormal condition is removed (high

temperature or heavy loading), the charging current

resumes the maximum values (set by R_SET), and the

time out counter will operate in normal rate.

Charge Status Indicator

Status

STAT1 STAT2

Pre-charge

Constant current and constant

voltage charge

Charge done

Fault condition (time out,

sleep mode, or OTP)

OFF

network

between

the

TS pin

and

the

negative-temperature coefficient resistor. The charging

process would resume after the battery temperature

goes back within the normal range.

The open drain pins STAT1 and STAT2 provides the

information about the charger status when the CE pin

(chip enable) is set to high. The various charger status

and the corresponding STAT1 and STAT2 levels are

given in the above Table. Connect these pins to the host

processor or LEDS to indicate the charger status.

Charge Timeout Setting

The charge timeout setting is programmed by the

resistor R_TMRconnected between the TMR and ground

pin. The timeout setting is given by:

Short Circuit Protection

t_CHG= K_TMR× R_TMR

AUR9807 provides short circuit protection for both the

input and the battery. When V_INis larger than V_BAT, AC

adapter (or USB port) is chosen as the power source. If

the output voltage is lower than 1V (V_OUT(SC1)) for more

than t_DGL(SC), a short circuit condition is detected; the

power path between the input and the output will be cut

off. The charging process will be interrupted. A 500Ω

resistor is used to pull up the output voltage; if the load

at the output is removed, the output voltage can be

pulled up and the short circuit condition is dissolved.

A suggested 36kΩ R_TMRgives a 3.6 hrs timeout setting

because the nominal value of K_TMRis 0.36 sec/Ω. In the

actual charging process, the charging duration is

elongated if the charging current can not reach the

maximum current setting (again this relates to system

loading and environment temperature); therefore, it is

possible that the charging process is still on progress

while the 3.6 hrs timeout limit has been reached. To

circumvent this problem, the actual charging current is

monitored and the clock rate of the timer counter is

halved if the charging current is less than 50% of the

maximum fast charging current. This is equivalent to

modify the timeout setting temporarily by the following

equation:

Similarly, when the battery is chosen as the power

source, an output voltage lower than the battery voltage

by 200mV (V_OUT(SC2)) longer than t_DGL(SC)will trigger

the short circuit protection mechanism (this

corresponds to a 5A loading current). A 10mA current

source is used to pull up the output and detect the

removal of the short condition. The power consumption

is less than 5μA under the battery supply mode;

however, AUR9807 is still able to monitor the output

voltage and detect a short circuit condition with this

limiting current budget.

t_CHG= K_EXT1x K_TMR× R_TMR, where K_EXT1=2

If the actual charging current is less than one fourth the

maximum fast charging current, the time out counter

rate is reduced to 25%. The temporary timeout setting

is given by:

SYSOFF Function

The SYSOFF function is used to cut off the power path

t_CHG= K_EXT2x K_TMR× R_TMR, where K_EXT2=4

between the battery and the output. This means the

18 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Charge Function Descriptions (Continued)

charger function can be disabled by pulling up the

SYSOFF pin; in this mode, the AUR9807 is almost a

regulator to power the system. Because the power path

is cut off, the output voltage will drop to zero when the

input source is removed, the battery will not be used to

power the system. The SYSOFF pin is pulled high

internally; therefore, this pin should be pulled to ground

for normal operation.

charge cycle starts.

If timeout occurs and the battery voltage is lower

than the recharge threshold, the charger will indicate

a fault condition and an internal resistor between

output and battery will try to pull up the battery

voltage. If the internal resistor is unable to pull up the

battery voltage to the recharge threshold, the charger

will stay in fault condition. Once the battery voltage

is higher than the recharge threshold, the charger

removes the pull-up resistor, leaves the fault

condition and stay in the charge done mode

temporarily. The charger then waits the battery

voltage to drop below the recharge threshold and

starts a new charge cycle.

Recharge Process and Timer Fault

Elimination

If timeout occurs and the battery voltage is higher

than the recharge threshold, the charger will stay in

the charge done mode until the battery voltage drops

below the recharge threshold. Once the battery

voltage drops below the recharge threshold, a new

19 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

PC Board Layout Considerations

It is important to pay special attention to the PCB

layout. The following provides some guidelines.

1. To obtain optimal performance, the decoupling

capacitor from the input terminal to GND and the

output filter capacitor from OUT to GND should be

placed as close as possible to the AUR9807, with

short trace runs to both signal and GND pins.

separate from the high-current charge or discharge

paths from the battery. Use a single-point ground

technique incorporating both the small signal

ground path and the power ground path.

3. The high-current charge paths into IN and from the

BAT and OUT pins must be sized appropriately for

the maximum charge current in order to avoid

voltage drops in these traces.

2. All low-current GND connections should be kept

STAT1

R1 1k

R2 1k

R3 1k

V_OUT

LED1 - Green

STAT2

JP5

V_OUT

+5V

LED2 - Red

/PG

R16

5.1V ZENER

LED3 - Green

0.1μF

V_OUT

10μF/16V

/opt

V_IN

R13

/opt

VREF

GND

/PG

STAT1

STAT2

/opt

10μF/35V

R14

30k

R15

50k

V_IN

TP4

OUT

BAT

OUT

V_BAT

OUT

TMR

ISET2

MODE

TMR

APM

/opt

1μF

R11

27k

R12

20k

TP3

ISET1

SYSOFF

APM

AUR9807

R10

10k

TP1

TP2

ISET1

10k

100k

SYS_OFF

ISET2

MODE

JP1

JP2

JP3

JP4

Figure 13. The Evaluation Board Schematic

20 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

PC Board Layout Considerations (Continued)

Figure 14. Top Side View of The Evaluation Board

Figure 15. Bottom Side View of The Evaluation Board

21 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Typical Application

VREF

GND

Adapter or USB

STAT1

STAT2

GND

/PG

10μF

OUT

TMR

SYSTEM

BAT

10μF

BATTERY

BAT

1μF

ISET2

MODE

R_TMR

R_APM

R_SET

APM

NTC

ISET1

SYSOFF

Control Signals and

Status Indicators

Figure 16. Typical Application of AUR9807

22 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

NOT RECOMMENDED FOR NEW DESIGN

Data Sheet

Single-cell Li-Ion Charger IC with System Power Management AUR9807

Mechanical Dimensions

QFN-4.5×3.5-20

Unit: mm(inch)

1.500(0.059)

BSC

Pin 1 Mark

0.300(0.012)

0.500(0.020)

N20

N19

2.950(0.116)

3.100(0.122)

4.500(0.177)

BSC

N12

N11

N10

3.500(0.138)

BSC

1.950(0.077)

2.100(0.083)

0.700(0.027)

0.800(0.031)

0.180(0.007)

0.300(0.012)

0.500(0.020)

BSC

0.200(0.008)

REF

0.000(0.000)

0.050(0.002)

23 of 23

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October 2014

AUR9807

Document number: DS37580 Rev. 1 - 3

BCD Semiconductor Manufacturing Limited

http://www.bcdsemi.com

IMPORTANT NOTICE

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cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any

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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

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型号:	AUSB3-AFN-BTR
是否Rohs认证：	符合
生命周期：	Active
Reach Compliance Code：	compliant
风险等级：	5.7
Base Number Matches：	1

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