Richtek RT9513GQW Schematic [ru]
Linear Single Cell Li-Ion Battery Charger IC
RT9513
General Description
The RT9513 is a fully integrated low cost single-cell LiIon battery charger IC ideal for portable a pplications. The
RT9513 is ca pable of being powered up from AC ada pter.
The RT9513 enters sleep mode when AC adapter is
removed.
The RT9513 optimizes the charging ta sk by using a control
algorithm including preconditioning mode, fast charge
mode and constant voltage mode. The charging task is
terminated a s 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 a mbient temperatures.
The RT9513 features 18V maximum rating voltages for
AC adapter. The other features are under voltage
protection, over voltage protection for AC ada pter supply .
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.
Features
zz
z
18V Maximum Rating for AC Adapter
zz
zz
z Internal Integrate P-MOSFETs
zz
zz
z AC Adapter Power Good Status Indicator
zz
zz
z Charge Status Indicator
zz
zz
z Under Voltage Protection
zz
zz
z Over Voltage Protection
zz
zz
z Automatic Recharge Feature
zz
zz
z Small 10-Lead WDFN Package
zz
zz
z Thermal Feedback Optimizing Charge Rate
zz
zz
z RoHS Compliant and Halogen Free
zz
Applications
z Digital Camera s
z Cellular Phones
z Personal Data Assistants (PDAs)
z MP3 Players
z Hand Held PCs
Pin Configurations
(TOP VIEW)
ACIN
NC
CHG_S
PGOOD
GND
1
2
3
GND
4
5
WDFN-10L 3x3
10
BATT
9
NC
8
EN
7
NC
9
11
ISETA
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
To System
To System
1uF
Exposed Pad (11)
1
ACIN
3
CHG_S
4
PGOOD
5,
GND
RT9513
DS9513-01 April 2011 www.richtek.com
BATT
EN
ISETA
10
+
Chip Shutdown
8
6
Chip Enable
R
SET
1
RT9513
Functional Pin Description
Pin No. Pin Name Pin Function
1 ACIN
2, 7, 9 NC
3
CHG_S
4 PGOOD
5 GND
6 ISETA
8
EN
10 BATT
Exposed Pad (11) GND
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.
Gr oun d. The ex pos ed pad must be sold er ed to a lar ge PCB and conne ct ed to
GND for maximum power dissipation.
Function Block Diagram
GND
Charge Input
Selection
SENSE
FET
ACIN
ACIN
PFET
Comparator
2.5V
OVP
+
-
OVP
ISETA
0.25V
Current
Amplifier
Tcrmination
Comparator
0.25V
0.9V
2.5V
0.5V
BATT
V
REF
Thermal
Sense
115 C
2.5V
-
Precharge
+
Charge
-
Disable
+
1uA
+
V/I
0.25V
2.5V
+
-
V/I
+
-
Voltage
Amplifier
Charge Done
Precharge
Comparator
2.5V
Comparator
2.5V
VCC
Logic
+
-
Recharge
+
-
Precharge
Recharge
PGOOD
CHG_S
EN
DS9513-01 April 2011www.richtek.com
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RT9513 Flow Chart
RT9513
Table
Start-Up Precharge Phase Fast Charge Phase Standby/Fault Recharge Phase
ACIN
Power Up
DISABLE MODE
V
EN
> 1.4V ?
YES
P-MOSFET OFF
= 0
I
BATT
DISABLEUVP / OVPSLEEPStart-Up
V
ACIN
V
ACIN
V
ACIN
1ms Delay
V
TS
V
TS
NO
> 6.5V or
< 4.4V?
NO
< V
BATT
NO
> 2.5V
or
< 0.5V?
NO
YES
?
YES
OVP/UVP MODE
P-MOSFET OFF
= 0
I
BATT
SLEEP MODE
P-MOSFET OFF
= 0
I
BATT
RECHARGE
V
BATT
> 2.8V?
NO
I
= 0.1 Charge
BATT
Current
/CHG_S Pull Down
YES
YES
I
= Charge
BATT
Current
/CHG_S Pull Down
NO
V
I
BATT
YES
BATT ~
< 0.1 I
4.2V,
CHG
?
YES
STANDBY
PFET OFF
V
BATT
I
BATT
= 4.2V,
= 0
NO
V
BATT
> 4.1 V?
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