RT9513
Linear Single Cell Li-Ion Battery Charger IC
General Description
The RT9513 is a fully integrated low cost single-cell Li-
Ion battery charger IC ideal for portable applications. The
RT9513 is capable of being powered up from AC adapter.
The RT9513 enters sleep mode when AC adapter is
removed.
The RT9513 optimizes the charging task by using a control
algorithm including preconditioning mode, fast charge
mode and constant voltage mode. The charging task is
terminated as the charge current drops below the preset
threshold. The AC adapter charge current can be
programmed up to 1A with an external resister. The internal
thermal feedback circuitry regulates the die temperature
to optimize the charge rate for all ambient temperatures.
The RT9513 features 18V maximum rating voltages for
AC adapter. The other features are under voltage
protection, over voltage protection for AC adapter supply.
Features
18V Maximum Rating for AC Adapter
Internal Integrate P-MOSFETs
AC Adapter Power Good Status Indicator
Charge Status Indicator
Under Voltage Protection
Over Voltage Protection
Automatic Recharge Feature
Small 10-Lead WDFN Package
Thermal Feedback Optimizing Charge Rate
RoHS Compliant and Halogen Free
Applications
Digital Cameras
Cellular Phones
Personal Data Assistants (PDAs)
MP3 Players
Hand Held PCs
Ordering Information
RT9513
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
ACIN
1
NC
2
CHG_S
3
PGOOD
4
GND
5
GND
11
10
BATT
9
NC
8
EN
7
NC
ISETA
WDFN-10L 3x3
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Typical Application Circuit
Battery Pack
AC
Adapter
+
RT9513
10
1
BATT
ACIN
1uF
3
8
6
Chip Shutdown
Chip Enable
R
SET
To System
CHG_S
4 PGOOD
To System
5,
GND
Exposed Pad (11)
EN
ISETA
DS9513-01 April 2011
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1
RT9513
Functional Pin Description
Pin No.
1
2, 7, 9
3
4
5
6
8
10
Pin Nam e
ACIN
NC
CHG_S
PGOOD
GND
ISETA
EN
BATT
Pin Function
Wall Adaptor Charge Input Supply.
No Internal Connection.
Charge Status Indicator Output (open drain).
Power Good Indicator Output (open drain).
Ground.
Wall Adaptor Supply Charge Current Set Point.
Charge Enable Input (active low).
Battery Charge Current Output.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Exposed Pad (11) GND
Function Block Diagram
ACIN
OVP
Comparator
2.5V
+
-
SENSE
FET
ISETA
2.5V
V
REF
Thermal
Sense
115 C
2.5V
Recharge
Comparator
+
2.5V
0.25V
2.5V
Precharge
Voltage
Amplifier
Charge Done
Charge
Disable
1uA
Logic
VCC
-
-
+
Precharge
Comparator
+
2.5V
-
ACIN
PFET
GND
Charge Input
Selection
OVP
BATT
0.5V
+
-
V/I
Precharge
0.25V
V/I
Recharge
Current
Amplifier
Tcrmination
Comparator
-
0.25V
0.9V
+
-
+
+
-
PGOOD
CHG_S
EN
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DS9513-01 April 2011
RT9513
Table
RT9513 Flow Chart
Start-Up
Precharge Phase
Fast Charge Phase
Standby/Fault
Recharge Phase
ACIN
Power Up
DISABLE
V
EN
> 1.4V ?
YES
DISABLE MODE
P-MOSFET OFF
I
BATT
= 0
NO
UVP / OVP
V
ACIN
> 6.5V or
V
ACIN
< 4.4V?
YES
OVP/UVP MODE
P-MOSFET OFF
I
BATT
= 0
NO
V
ACIN
< V
BATT
?
SLEEP
YES
SLEEP MODE
P-MOSFET OFF
I
BATT
= 0
NO
Start-Up
1ms Delay
V
TS
> 2.5V
or
V
TS
< 0.5V?
NO
RECHARGE
V
BATT
> 2.8V?
I
BATT
= 0.1 Charge
Current
/CHG_S Pull Down
YES
NO
YES
I
BATT
= Charge
Current
/CHG_S Pull Down
YES
NO
STANDBY
PFET OFF
V
BATT
= 4.2V,
I
BATT
= 0
YES
V
BATT
> 4.1 V?
NO
V
BATT ~
4.2V,
I
BATT
< 0.1 I
CHG
?
DS9513-01 April 2011
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3
RT9513
Absolute Maximum Ratings
(Note 1)
−0.3V
to 18V
−0.3V
to 6V
1.2A
0.926W
108°C/W
AC Input Voltage -----------------------------------------------------------------------------------------------------------
EN Input Voltage -----------------------------------------------------------------------------------------------------------
Output Current -------------------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
WDFN-10L 3x3 -------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 2)
WDFN-10L 3x3,
θ
JA
-------------------------------------------------------------------------------------------------------
WDFN-10L 3x3,
θ
JC
------------------------------------------------------------------------------------------------------- 8.2°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ---------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions
(Note 4)
Junction Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(ACIN = 5V, T
A
= 27°C, Unless Otherwise specification)
Parameter
Supply Input
ACIN Input Voltage Range
ACIN UVP Hysteresis
ACIN Standby Current
ACIN Shutdown Current
ACIN UVP Current
BATT Sleep Leakage Current
Voltage Regulation
BATT Regulation Voltage
Regulation Voltage Accuracy
ACIN MOSFET
Current Regulation
ISETA Set Voltage
(Fast Charge Phase)
Full Charge Setting Range
AC Charge Current accuracy
Symbol
Test Conditions
Min
Typ
Max
6
4.5
120
500
100
250
10
4.242
+1
--
Units
V
V
mV
μA
μA
μA
μA
V
%
mΩ
V
ACIN
V
UV_LOW
I
STBY
I
SHDN
I
UVP
I
SLEEP
V
REG
R
DS(O N)_ACIN
V
BATT
= 4.5V
V
EN
= HIGH
V
ACIN
= 4V, V
BATT
= 3V
V
ACIN
= 4V, V
BATT
= 4.5V
I
BATT
= 60mA
I
BATT
= 500mA
4.5
--
50
--
--
--
--
4.158
−1
--
--
4.4
80
300
50
150
--
4.2
--
600
ACIN UVP Rising Threshold Voltage V
UV_HIGH
V
ISETA
I
CHG_AC
I
CHG_AC
V
BATT
= 3.5V
2.45
100
2.5
--
500
2.55
1200
--
V
mA
mA
V
BATT
= 3.8V, R
ISET
= 1.5kΩ
--
To be continued
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DS9513-01 April 2011
RT9513
Parameter
Precharge
BATT Pre-Charge Rising Threshold
BATT Pre-Charge Threshold
Hysteresis
Pre-Charge Current
Recharge Threshold
BATT Re-Charge Falling Threshold
Hysteresis
Charge Termination Detection
Termination Current Ratio (default)
Logic Input/Output
CHG_S Pull Down Voltage
PGOOD Pull Down Voltage
EN Threshold
Logic-High Voltage
Logic-Low Voltage
EN Pin Input Current
Protection
Thermal Regulation
OVP SET
Internal Default
--
--
125
6.5
--
--
°C
V
V
CHG_S
V
PGOOD
V
IH
V
IL
I
EN
V
EN
= 2V
TBD, I
CHG_S
= 5mA
TBD, I
PGO OD
= 5mA
--
--
1.5
--
--
65
220
--
--
--
--
--
--
0.4
2
mV
mV
V
V
μA
ΔV
RE CH_L
V
REG
−
V
BATT
60
100
150
mV
V
PRECH
ΔV
PRECH
I
PCHG
V
BATT
= 2V
2.6
50
8
2.8
100
10
3
200
12
V
mV
%
Symbol
Test Conditions
Min
Typ
Max
Units
I
TERM
V
BATT
= 4.2V
--
10
--
%
Note 1.
Stresses listed as the above
“Absolute
Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2.
θ
JA
is measured in the natural convection at T
A
= 25°C on a high effective thermal conductivity test board (4 layers, 1S)
of JEDEC 51-7 thermal measurement standard. The case point of
θ
JC
is on the expose pad for the package.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
DS9513-01 April 2011
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5
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