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  Richtek Technology Electronic Components Datasheet  

RT9514 Datasheet

Linear Single Cell Li-Ion Battery Charger IC

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RT9514 pdf
RT9514
Linear Single Cell Li-Ion Battery Charger IC
General Description
The RT9514 is a fully integrated low cost single-cell Li-
Ion battery charger IC ideal for portable applications. The
RT9514 is capable of being powered up from AC adapter.
The RT9514 enters sleep mode when AC adapter is
removed.
The RT9514 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 RT9514 features 18V maximum rating voltages for
AC adapter. The other features are under voltage
protection, over voltage protection for AC adapter supply.
Ordering Information
RT9514
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
z 18V Maximum Rating for AC Adapter
z Internal Integrate P-MOSFETs
z AC Adapter Power Good Status Indicator
z Charge Status Indicator
z Under Voltage Protection
z Over Voltage Protection
z Automatic Recharge Feature
z Small 10-Lead WDFN Package
z Thermal Feedback Optimizing Charge Rate
z RoHS Compliant and Halogen Free
Applications
z Digital Cameras
z Cellular Phones
z Personal Data Assistants (PDAs)
z MP3 Players
z Handheld PCs
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
AC
Adapter
Battery Pack
1
RT9514
ACIN
BATT
10
1uF
To System
To System
3 CHG_S
4 PGOOD
5,
Exposed Pad (11) GND
8
EN
ISETA 6
Chip Shutdown
Chip Enable
RSET
DS9514-01 April 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9514 Datasheet

Linear Single Cell Li-Ion Battery Charger IC

No Preview Available !

RT9514 pdf
RT9514
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
ACIN
Wall Adaptor Charge Input Supply.
2, 7, 9
3
NC
CHG_S
No Internal Connection.
Charge Status Indicator Output (open drain).
4
PGOOD
Power Good Indicator Output (open drain).
5 GND Ground.
6
ISETA
Wall Adaptor Supply Charge Current Set Point.
8 EN
10 BATT
11 (Exposed Pad) GND
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.
Function Block Diagram
ACIN
GND
Charge Input
Selection
SENSE
FET
ACIN
PFET
OVP
Comparator
2.5V
+
-
OVP
ISETA
2.5V
0.5V
0.25V
VREF
Loop Controller
Precharge
Comparator
+
2.5V -
Precharge
Recharge
Comparator
+
2.5V -
Recharge
VCC
Tcrmination
Comparator
-
VREF
0.25V +
0.9V -
Charge
Disable
+
1uA
125 C
Charge Done
Logic
BATT
PGOOD
CHG_S
www.richtek.com
2
EN
DS9514-01 April 2011


Part Number RT9514
Description Linear Single Cell Li-Ion Battery Charger IC
Maker Richtek Technology
Total Page 10 Pages
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