AUR9807DSGD [BCDSEMI]
Single-cell Li-Ion Charger IC with System Power Management;
| 型号： | AUR9807DSGD |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | Single-cell Li-Ion Charger IC with System Power Management |
| 文件： | 总24页 (文件大小：1434K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
(VAPM-REG), the Active Power Management function
is activated and tries to maintain the output voltage
at VAPM-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 VAPM
.
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 VAPM-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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October 2014
© Diodes Incorporated
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
1
20
STAT1
2
GND
19
18
17
16
15
14
13
3
4
STAT2
IN
/PG
OUT
OUT
OUT
5
6
BAT
BAT
Exposed
Pad
ISET2
MODE
CE
7
8
9
TMR
APM
12 TS
10
11
Figure 2. Pin Configuration of AUR9807 (Top View)
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October 2014
© Diodes Incorporated
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.
1
O
VREF
2
3
4
O
O
I
STAT1
STAT2
IN
Charge status flag 1 (open-drain)
Charge status flag 2 (open-drain)
Chip input voltage
Battery connection; charging or discharging all through this
pin
USB mode total current selection (High=450mA, Low=
90mA) and AC mode charge current selection (High=Full
current, Low=half current)
5 , 6
7
I/O
I
BAT
ISET2
8
I
I
MODE
CE
Set AUR9807 in AC(High) or USB(Low) mode
Chip enable (active high)
9
10
11
12
I/O
I
ISET1
SYSOFF
TS
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
13
14
I
APM
TMR
I/O
15 , 16 , 17
18
O
O
I
OUT
/PG
System output
Power-good status flag (open-drain)
Chip Ground
19 , 20
GND
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© Diodes Incorporated
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
1
3.3V
VREF
OUT
Short-Circuit
Recovery
15, 16, 17
VOUT
4
Q1
IN
UVLO
ISENSE
Power Source
Selection
10
ISET1
BAT
VI(ISET1)
Q2
VISENSE
100mA
500mA
VSET
5, 6
VBAT
VOUT
VOUT(REG)
11
SYSOFF
GND
VBAT
VBAT(REG)
19, 20
VI(ISET1)
VSET
VSET
VAPM
14
13
TMR
APM
Oscillator
TJ
TJ(REG)
VBAT
VOUT
IAMP
1V
ITS
VHTF
AC Charge Enable
BAT Charge Enable
500mA/100mA
12
1V
Thermal
Shutdown
TS
VLTF
Fast Precharge
Power Source Selection
8
9
1C - 500mA
C/S - 100mA
Charge
Control Timer
and Display
Logic
MODE
CE
7
18
2
ISET2
/PG
VBAT
VRCH
Recharge
STAT1
STAT2
VBAT
VLOWV
Precharge
Termation
Sleep
VI(ISET1)
VTERM
3
VBAT
VIN
Figure 3. Functional Block Diagram of AUR9807
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October 2014
© Diodes Incorporated
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
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
QFN-4.5x3.5-20
-40 to 85C
6V, CV Mode
6V, Done
BCD Semiconductor's Pb-free products, as designated with "G" in the part number, are RoHS compliant and
green.
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October 2014
© Diodes Incorporated
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
VIN
-0.3 to 18
V
VBAT, VCE, VAPM, V/PG
,
VMODE, VOUT, VISET1
VISET2, VSTAT1, VSTAT2
VTS
,
,
-0.3 to 7
V
Input Voltage
VREF
VTMR
IIN
-0.3 to VOUT+0.3
V
V
A
A
A
-0.3 to VOUT+0.3
Input Current
3.5
4
IOUT
IBAT
Output Current
-4 to 1.5
Output Source Current
(In Regulation at 3.3V VREF
IREF
I/PG, ISTAT1, ISTAT2
JA
30
15
52
mA
mA
)
Output Sink Current
Thermal Resistance
(Junction to Ambient)
°C/W
Storage Temperature
Junction Temperature
TSTG
TJ
-65 to 150
-40 to 150
°C
°C
Lead Temperature
(Soldering, 10 Seconds)
300
°C
ESD (Human Body Model)
ESD (Machine Model)
VHBM
VMM
2000
200
V
V
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
VIN
AUR9807DFGD,AUR9807VFGD,
AUR9807DIGD, AUR9807VIGD
4.35
-40
5.5
V
IIN
2
A
Operating Junction Temperature Range
TOP
125
°C
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© Diodes Incorporated
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
TA=25oC, VIN is within the recommended range, unless otherwise specified.
Parameter
Symbol
Test Condition
Min Typ Max Unit
Active Supply Current
IIN(SPLY)
VIN>4.35V
VIN<VBAT
2.6V<VBAT<VBAT(REG)
No load at OUT pin
1.1
2
mA
,
Sleep Mode Current into
BAT Pin
IBAT(SLP)
2.5
5
μA
VIN<6V, Total current flow
into IN pin with CE pin
low; no load
Input
Current
Pin
Standby
IIN(STDBY)
200
65
5
μA
μA
μA
Total current flow into
BAT Pin Standby Current
IBAT(STDBY) BAT pin with input source
present and CE pin low
45
1
Current flows into BAT
pin after the termination of
the charging process
Charge Done Current,
BAT
IBAT(TERM)
Q1,Q2 DROP-OUT VOLTAGE
IN to OUT Dropout
Voltage
BAT to OUT Dropout
Voltage
VDO(IN-OUT) MODE=High , IIN=1A
VDO(BAT-OUT) VBAT> 4V , IBAT=1A
300
40
475
100
mV
mV
VOLTAGE REGULATION
Regulation VOUT
9807VF 9807DF
Regulation VOUT
9807VI 9807DI
Regulation VOUT
9807VS 9807DS
VOUT(REG)
VOUT(REG)
VOUT(REG)
VIN>4.4V+VDO(IN-OUT)
VIN>5V+VDO(IN-OUT)
VIN>6V+VDO(IN-OUT)
4.4
4.9
6
4.5
5.1
6.3
V
V
V
APM REGULATION
APM Set Point
VAPM-SET
IAPM-SET
SF
VAPM-SET<VOUT
2.6
95
3.8
V
APM Current Source
APM Scale Factor
Input present
100
105
μA
VAPM-REG=VAPM-SET x SF
1.139 1.15 1.162
BATTERY SUPPLEMENT MODE
VOUT
<
Run Battery Supplement
Mode
VBSUP1
VBAT>2V
VBAT>2V
VBAT–
V
V
60mV
VOUT
>
Escape
Battery
VBSUP2
VBAT–
Supplement Mode
20mV
CHARGING-PRECHARGE
Precharge to Fast-charge
Transition Voltage
VLOWV
IPRECHG
Voltage on BAT
2.9
10
3
3.1
V
Precharge Current Range
150
mA
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© Diodes Incorporated
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)
TA=25oC, VIN is within the recommended range, unless otherwise specified.
Parameter
Symbol
Test Condition
Min Typ Max Unit
Precharge Set Voltage
VPRECHG
225
250
275
mV
tFALL=100ns,
10mV overdrive,
De-glitch Time Between
Fast
Charge
and
tDGLF
22.5
ms
VBAT
decreasing
below
Precharge Transition
threshold
CHARGING-CURRENT REGULATION
Fast Charge Current
Range
ICHG
RPBAT
VSET
VBAT>VLOWV, Mode=High
100
2.4
1000 1500
1000
mA
Ω
BAT to OUT Pull-up
VBAT<1V
Battery Charge Current
Set Voltage(1)
Voltage on ISET1
2.5
2.6
V
100mA<ICHG<1.5A
10mA<ICHG<100mA
375
300
425
450
450
600
Charge
Factor
Current
Set
KSET
USB MODE INPUT CURRENT LIMIT
ISET2=High
ISET2=Low
400
80
500
100
USB Input Current Range
IUSB
mA
90
CHARGING VOLTAGE REGULATION
Battery-charge-voltage
4.2
V
%
%
VBAT(REG) TA=25°C
-0.5
-1
0.5
1
Battery Charge Voltage
Regulation Accuracy
CHARGE TERMINATION DETECTION
VBAT>VRCH
,
ITERM=(KSET x VTERM)/
RSET
Charge Done Detection
Current
ITERM
10
150
mA
mV
VBAT>VRCH, Mode=High
VBAT>VRCH, Mode=Low
230
95
250
100
270
130
Charge Done Set Voltage,
Measured on ISET1
VTERM
TEMPERATURE SENSE COMPARATORS
High
Temperature Threshold
Low Voltage High
Temperature Threshold
Current Source for
Temperature Sense
Voltage,
Low
VLTF
VHTF
ITS
Temp fault at VTS>VLTF
Temp fault at VTS<VHTF
2.5
0.5
100
V
V
,
95
105
μA
BATTERY RECHARGE THRESHOLD
VBAT(RE VBAT(RE VBAT(RE
Recharge
Voltage
Threshold
VRCH
V
G)
G)
G)
-0.125 -0.1 -0.075
(1) For half-charge rate, VSET is 1.25V.
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© Diodes Incorporated
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)
TA=25oC, VIN is within the recommended range, unless otherwise specified.
Parameter
Symbol
Test Condition
Min Typ Max Unit
STAT1, STAT2, AND /PG
IOL=5mA,
external pull-up resistor>
1kΩ
requiring
an
Low-level
Saturation Voltage
Output
VOL
ILKG
0.25
5
V
Input Leakage Current
1
μA
ISET2, CE
tCE-HLDOF
CE Pin Hold-off Time
CE fall low only
4
6
ms
V
F
Low-level Input Voltage
High-level Input Voltage
VIL
0
1.1
VIH
IIL1
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
IIH1
IIL2
IIH2
1
μA
VISET2=0.4V
VISET2=VIN
-20
40
MODE
Falling Hi→Low;
280kΩ±10% applied when 0.975
low
Mode Pin
Low-level Input Voltage
VIL
1
1.025
V
Mode Pin
High-level Input Voltage
Mode Pin
Low-level Input Current
Input RMODE sets external VIL+
VIL+
0.024
VIH
IIL
V
hysteresis
0.01
-1
μA
TIMERS
Timer Set Factor
External Resistor Limits
KTMR
RTMR
tCHG=KTMR x RTMR
0.313 0.36 0.414
30 100
s/Ω
kΩ
0.115 0.125 0.135
Precharge Timer
tPRECHG
RFAULT
KEXT1
x
x
x
s
tCHG
tCHG
tCHG
Timer Fault Recovery
Pull-up from OUT to BAT
1
2
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
KEXT2
4
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© Diodes Incorporated
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)
TA=25oC, VIN is 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
VBAT
+0.125
VSLPENT
VSLPEXIT
mV
Exit
VBAT
+0.195
DE-GLITCH TIME
De-glitch Time
Charge Done Detection,
for
Temperature
Recharge
Mode Detection
Fault,
Sleep
tDEG
18.75
150
ms
and
START-UP CONTROL BOOT-UP
On the first application
of input low
Boot-up Time tBOOT-UP
120
180
50
ms
SWITCHING POWER SOURCE TIMING
When input applied.
Measure from: [/PG: Lo
→ Hi to IIN>5 mA ]
Switching Power Source
from Input to Battery
tSW-BAT
μs
THERMAL SHUTDOWN REGULATION
Temperature Trip
TSHTDWN
TJ(REG)
VUVLO
TJ (Q1 and Q3 only)
TJ (Q1 and Q3 only)
150
25
Thermal Hysteresis
°C
Temperature Regulation
Limit
TJ (Q2)
110
2.45
55
130
2.65
130
UVLO
Under-voltage Lockout
Decreasing VIN
2.5
80
V
mV
mV
V
Input power detected
when
VIN>VBAT + VIN(DT)
VBAT=3.6V
Input Power Detection
Threshold
VIN(DT)
VIN: 3.5V → 4V
Hysteresis
27
VREF OUTPUT
Output
Voltage
Regulation
Active only if ADP or
USB is present
VREF
3.3
Regulation Accuracy
Output Current
-5
+5
20
50
1
%
mA
Ω
IREF
RDS(ON)
COUT
On Resistance
OUT to VREF
Output Capacitance
μF
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© Diodes Incorporated
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)
TA=25oC, VIN is 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
VOUT<VBAT–200mV
IOSH1
10
mA
IN to OUT Short-circuit
Protection
RSHAC
VOUT<1V
500
1
Ω
Output
Short-circuit
Threshold,
VIN>VUVLO and
VIN>VBAT + VIN(DT)
Detection
Power-on
Output
VOUT(SC1)
0.9
1.1
V
Short-circuit
Threshold,
Detection
Supplement mode
(VBAT – VOUT)>VOUT(SC2)
Indicates Short-circuit
Deglitch
Supplement Mode Short
Circuit
VOUT(SC2)
VBAT>2.5V
160
200
512
240
mV
Time,
tDGL(SC2)
μs
Maximum Short-current
for VBAT>VOUT
(2)
ISHORT
VBAT>2.5V
9
A
(2) For short current>ISHORT , 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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© Diodes Incorporated
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)
VOUT
2V/div
VIN
2V/div
ICHG
0.5A/div
Time 20ms/div
Figure 6. Charge Current vs. Input Voltage
Figure 7. Power On
VIN
2V/div
VOUT
VOUT
2V/div
2V/div
VIN
2V/div
ICHG
0.5A/div
ICHG
1A/div
VMODE
2V/div
VSYSOFF
2V/div
Time 1ms/div
Time 200s/div
Figure 8. SYSOFF Floating
Figure 9. MODE Pin Pull Low
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© Diodes Incorporated
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)
VIN
2V/div
VOUT
VIN
2V/div
VOUT
2V/div
2V/div
ICHG
0.5A/div
ICHG
0.5A/div
VISET2
VISET2
2V/div
2V/div
Time 40s/div
Time 400s/div
Figure 10. ISET2 Pin Pull High
Figure 11. ISET2 Pin Pull Low
VIN
2V/div
VOUT
2V/div
ICHG
0.5A/div
VMODE
2V/div
Time 40s/div
Figure 12. MODE Pin Pull High
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© Diodes Incorporated
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)
IN
OUT
BAT
Q1
System
VDC
Q2
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
No
Yes
No
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
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© Diodes Incorporated
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 = ICHG
Current
Voltage
VBAT = 4.2V
VBAT=Recharge threshold
VBAT=3V
Charge Current = 0.1 x ICHG
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
ICHG,max
IPRECHG
;
V
SET KSET
RSET
10
ICHG
ICHG
ICHG
, V
2.5
1.25
2.5
MODE=High ISET2=High
MODE=High ISET2=Low
SET,max
ICHG,max
ITERM
;ACMode
10
ICHG,max
IPRECHG
VSET KSET
20
, V
SET,max
RSET
ICHG,max
ITERM
;ACMode
20
ICHG,max
IPRECHG
VSET KSET
10
ISET2=High/L
, V
MODE=Low
ow
SET,max
RSET
ICHG,max
ITERM
;USBMode
25
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© Diodes Incorporated
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 VLOWV, 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 RSET=1kΩ, the maximum charging current is
about 1A for ISET2=High and 0.5A for ISET2=Low.
The pre-charge current IPRECHG is 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 VBAT(REG), the
charger enters the constant voltage mode. At this
stage, the charger keeps the battery voltage at
VBAT(REG) with a decreasing charging current. When
the charging current drops below the charge done
Power Source Selecting
AC Adapter
VDC
IN
OUT
Q
1
System
Q2
40mΩ
+
-
BAT
AUR9807
i.
VIN<VBAT : VOUT=VBAT–VDO(BAT-OUT)
ii.
iii.
iv.
VBAT<VIN<VOUT(REG) : VOUT=VIN–VDO(IN-OUT)
VOUT(REG) +VDO(IN-OUT)<VIN<6V: VOUT=VOUT(REG)
6V<VIN: VOUT =VBAT–VDO(BAT-OUT)
The AUR9807 selects power source automatically
depending on the voltage present at the input. When
VIN is lower than VBAT, the battery is responsible to
the output voltage VOUT is VIN–VDO(IN-OUT); when VIN
is high enough, which means that VIN>(VOUT(REG)
+
VDO(IN-OUT)), the output voltage is regulated at
VOUT(REG). When the input voltage VIN is 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 VOUT
power the system. The output voltage VOUT is VBAT
–
VDO(BAT-OUT). When the input voltage VIN is higher
than VBAT and lower than 6V, the input source is used
to supply the system power; the output voltage
depends on VIN. When VIN is lower than VOUT(REG)
,
is then VBAT–VDO(BAT-OUT).
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© Diodes Incorporated
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 VAPM-REG, the
input source is capable of providing the charging
current (set by RSET) and output current (determined by
system loading) simultaneously. When the output
voltage goes down and reaches VAPM-REG due to an
increasing loading, AUR9807 starts to reduce the
charging current and tries to keep the output voltage at
VAPM-REG. Because AUR9807 uses the remaining
available current to charge the battery, the charging
current can be estimated as Isupply max – IOUT. In AC mode,
the Isupply max is determined by the driving capability of
the AC adapter and AUR9807 itself (usually the
limiting factor is the AUR9807, and Isupply max is about
2A). The Isupply max is determined by the ISET2 setting in
USB mode (Isupply max is about 450mA with ISET2 high,
and Isupply max is about 90mA with ISET2 low).
Active Power Management (APM)
AC MODE (MODE=HIGH)
i.
VAPM-REG<VOUT : Normal Mode; ICHG determined
by RSET
ii.
VBAT<VOUT<VAPM-REG : APM mode ; ICHG= Isupply
max–IOUT
iii. VOUT<VBAT : BAT supply mode
USB 500 MODE (MODE=LOW ,
ISET2=HIGH)
i.
VAPM-REG<VOUT: Normal Mode; ICHG determined
by RSET
ii.
VBAT<VOUT<VAPM-REG : APM mode; ICHG =
450mA – IOUT
iii. VOUT<VBAT: BAT supply mode
USB 100 MODE (MODE=LOW ,
ISET2=LOW)
i. VAPM-REG<VOUT : Normal Mode; ICHG determined
by RSET
When the loading current keeps increasing and exceeds
Isupply max, the AUR9807 can not prevent the output
voltage dropping below VAPM-REG even 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 VBAT. At this situation, we have:
ii.
VBAT<VOUT<VAPM-REG : APM mode; ICHG=
90mA–IOUT
iii. VOUT<VBAT : 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 VAPM-REG is given by:
(5)
IOUT = Isupply max+IBAT
(4) RAPM<38kΩ: VAPM-REG=IAPM-SET×RAPM×SF
RAPM>41kΩ: The VAPM-REG is set to
predetermined fixed value (4.26V)
(5) IBAT=(VBAT–VOUT) / (40mΩ Power Path
Resistance)
a
VAPM-REG = IAPM-SET×RAPM × SF(4)
Battery Temperature Protection
AUR9807
BAT
Li Battery
1µF
100µA
VHTF
NTC
TS
VLTF
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October 2014
© Diodes Incorporated
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 VLTF (nominally 2.5V) or lower than
VHTF (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 RSET), 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)
ON
ON
OFF
ON
ON
OFF
OFF
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 RTMR connected between the TMR and ground
pin. The timeout setting is given by:
Short Circuit Protection
tCHG = KTMR × RTMR
AUR9807 provides short circuit protection for both the
input and the battery. When VIN is larger than VBAT, AC
adapter (or USB port) is chosen as the power source. If
the output voltage is lower than 1V (VOUT(SC1)) for more
than tDGL(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 RTMR gives a 3.6 hrs timeout setting
because the nominal value of KTMR is 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 (VOUT(SC2)) longer than tDGL(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.
tCHG = KEXT1 x KTMR × RTMR, where KEXT1=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
tCHG = KEXT2 x KTMR × RTMR, where KEXT2=4
between the battery and the output. This means the
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© Diodes Incorporated
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
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© Diodes Incorporated
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
H
VOUT
LED1 - Green
STAT2
JP5
VOUT
+5V
3
2
1
H
LED2 - Red
/PG
R16
1k
D1
5.1V ZENER
LED3 - Green
C1
0.1μF
VOUT
C4
10μF/16V
C5
/opt
VIN
U1
R13
/opt
1
2
20
19
18
17
16
15
14
13
12
11
VREF
GND
GND
/PG
C6
C2
STAT1
STAT2
IN
3
/opt
10μF/35V
R14
30k
R15
50k
4
VIN
TP4
OUT
5
BAT
BAT
OUT
6
VBAT
OUT
TMR
7
ISET2
MODE
CE
TMR
8
APM
C7
/opt
C3
1μF
9
R11
27k
R12
20k
TS
10
TP3
ISET1
SYSOFF
APM
AUR9807
R10
10k
TP1
TP2
TS
ISET1
R8
1k
R9
10k
R4
100k
R5
100k
R6
100k
R7
100k
L
L
L
3
2
1
3
2
1
3
2
1
L
CE
H
3
2
1
SYS_OFF
ISET2
H
MODE
H
H
JP1
JP2
JP3
JP4
H
Figure 13. The Evaluation Board Schematic
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© Diodes Incorporated
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
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© Diodes Incorporated
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
2
19
STAT1
STAT2
IN
GND
/PG
3
4
5
6
7
8
9
18
17
16
15
14
13
12
10μF
OUT
OUT
OUT
TMR
SYSTEM
BAT
10μF
BATTERY
BAT
1μF
ISET2
MODE
CE
RTMR
RAPM
RSET
APM
TS
NTC
ISET1
SYSOFF
Control Signals and
Status Indicators
Figure 16. Typical Application of AUR9807
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© Diodes Incorporated
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
N1
N19
N2
2.950(0.116)
3.100(0.122)
4.500(0.177)
BSC
N12
N9
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
© Diodes Incorporated
AUR9807
Document number: DS37580 Rev. 1 - 3
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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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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of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
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