RT9513GQW - Richtek Technology

RT9513

DS9513-01 April 2011 www.richtek.com

Features

z18V Maximum Rating for AC Adapter

zInternal Integrate P-MOSFETs

zAC Adapter Power Good Status Indicator

zCharge Status Indicator

zUnder Voltage Protection

zOver Voltage Protection

zAutomatic Recharge Feature

zSmall 10-Lead WDFN Package

zThermal Feedback Optimizing Charge Rate

zRoHS Compliant and Halogen Free

Pin Configurations

Applications

zDigital Ca meras

zCellular Phones

zPersonal Data Assista nts (PDAs)

zMP3 Players

zHand Held PCs

Ordering Information

General Description

The RT9513 is a fully integrated low cost single-cell Li-

Ion 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 task 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 pre set

threshold. The AC adapter charge current can be

programmed up to 1A with an external resister . The internal

thermal feedba ck circuitry regulates the die temperature

to optimize the charge rate f or 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 .

(TOP VIEW)

WDFN-10L 3x3

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. Marking Information

For marking information, conta ct our sales representative

directly or through a Richtek distributor located in your

area.

Linear Single Cell Li-Ion Battery Charger IC

ACIN

GND

BATT

ISETA

GND

CHG_S

PGOOD EN

Typical Application Circuit

RT9513

1uF

Adapter ACIN

GND

BATT

Battery Pack

Exposed Pad (11)

CHG_S

PGOOD

To System

To System 8

EN Chip Shutdown

Chip Enable

ISETA

RSET

RT9513 Package Type

QW : WDFN-10L 3x3 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

RT9513

2DS9513-01 April 2011www.richtek.com

Functional Pin Description

Pin No. Pin Name Pin Func tion

1 ACIN Wall Adaptor Charge Input Supply.

2, 7, 9 NC No Internal Connecti on.

3 CHG_S Charge S tatus Indi cator Output (open drain).

4 PGOOD

Power Good Indicator Output (open drain).

5 GND Ground.

6 ISETA

Wall Adaptor S upply Charge Current Set Point.

8 EN Charge Enable Input (active lo w).

10 BATT Battery Charge Current Output.

Exposed Pad (11) GND Groun d. The ex posed pad must be so ld ered to a l arge PCB and c onne ct ed to

GND for maximum power dissipation.

Function Block Diagram

Precharge

2.5V

Recharge

2.5V

Thermal

Sense

V/I

0.25V

2.5V

V/I

Precharge

VREF

2.5V

0.25V

0.5V

-Charge Done

0.25V Logic

-Charge

Disable

0.9V

1uA

Precharge

Comparator

Recharge

Comparator

ACIN

ISETA BATT

Voltage

Amplifier

Current

Amplifier

Tcrmination

Comparator

VCC

115 C

CHG_S

PGOOD

Charge Input

Selection OVP

2.5V

OVP

Comparator

ACIN

PFET

SENSE

FET

GND

RT9513

DS9513-01 April 2011 www.richtek.com

Table

YES

VTS > 2.5V

VTS < 0.5V?

VBATT ~ 4.2V,

IBATT < 0.1 ICHG?

VACIN < VBATT ?

VACIN > 6.5V or

VACIN < 4.4V?

VEN > 1.4V ? DISABLE MODE

P-MOSFET OFF

IBATT = 0

OVP/UVP MODE

P-MOSFET OFF

IBATT = 0

SLEEP MODE

P-MOSFET OFF

IBATT = 0

RECHARGE

IBATT = 0.1 Charge

Current

/CHG_S Pull Down

STANDBY

PFET OFF

VBATT = 4.2V,

IBATT = 0

1ms De lay

IBATT = Charge

Current

/CHG_S Pull Down

VBATT > 4.1 V?

VBATT > 2.8V?

ACIN

Power Up

Start-Up Precharge Phase Fast Charge Phase Standby/Fault Recharge Phase

RT9513 Flow Chart

DISABLEUVP / OVPSLEEPStart-Up

RT9513

4DS9513-01 April 2011www.richtek.com

Absolute Maximum Ratings (Note 1)

zAC Input Voltage----------------------------------------------------------------------------------------------------------- −0.3V to 18V

zEN Input Voltage ----------------------------------------------------------------------------------------------------------- −0.3V to 6V

zOutput Current ------------------------------------------------------------------------------------------------------------- 1.2A

zPower Dissipation, PD @ TA = 25°C

WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------------- 0.926W

zPa ckage Thermal Re sistance (Note 2)

WDFN-10L 3x3, θJA ------------------------------------------------------------------------------------------------------- 108°C/W

WDFN-10L 3x3, θJC ------------------------------------------------------------------------------------------------------- 8.2°C/W

zLead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C

z Junction Temperature ---------------------------------------------------------------------------------------------------- 150°C

zStorage T emperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C

zESD Susceptibility (Note 3)

HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV

MM (Ma chine Mode) ------------------------------------------------------------------------------------------------------ 200V

Electrical Characteristics

(ACIN = 5V, TA = 27°C, Unless Otherwise specification)

To be continued

Parameter Symbol Test Conditions Min Typ Max Units

Supply Input

ACIN Input V oltage Range VACIN 4.5 --

6 V

ACIN UVP Rising Threshold Voltage VUV_HIGH -- 4.4 4.5 V

ACIN UVP Hysteresis VUV_LOW 50 80 120 mV

ACIN Standby Current ISTBY V

BATT = 4.5V -- 300 500 μA

ACIN Shutdown Current ISHDN VEN = HIGH -- 50 100 μA

ACIN UVP Current IUVP V

ACIN = 4V, VBATT = 3V -- 150 250 μA

BATT Sleep Leakage Current ISLEEP V

ACIN = 4V, VBATT = 4.5V -- -- 10 μA

Volta ge Regula tion

BATT Regulation Voltage VREG I

BATT = 60mA 4.158 4.2 4.242 V

Regulation Voltage Acc uracy −1 -- +1 %

ACIN MOSFET RDS(ON)_ACIN I

BATT = 500mA -- 600 -- mΩ

Cur rent Re gulati on

ISETA Set Voltage

(Fast Charge Phase) VISETA V

BATT = 3.5V 2.45 2.5 2.55 V

Full Charge Settin g Range ICHG_AC 100 -- 1200 mA

AC Charge Current accuracy ICHG_AC V

BATT = 3.8V, RISET = 1.5kΩ -- 500 -- mA

Recommended Operating Conditions (Note 4)

zJunction T emperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C

zAmbient T emperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C

RT9513

DS9513-01 April 2011 www.richtek.com

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. θJA is measured in the natural convection at TA = 25°C on a high effective thermal conductivity test board (4 layers, 1S)

of JEDEC 51-7 thermal measurement standard. The case point of θJC 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.

Parameter Symbol Test Conditions Min Typ Max Units

Precharge

BATT Pre-Charge Rising Threshold VPRECH 2.6 2.8 3 V

BATT Pre-Charge Threshold

steresis ΔVPRECH 50 100 200 mV

Pre-Charge Current IPCHG V

BATT = 2V 8 10 12 %

Recharge Threshold

BATT Re-Charge Falli n g Threshold

Hysteresis ΔVRECH_L V

REG − VBATT 60 100 150 mV

Charge Termination Detection

Terminat ion Curre nt Ratio (default ) ITERM V

BATT = 4.2V -- 10 -- %

Logic Input/Output

CHG_S Pu ll Down Voltage VCHG_S TBD, ICHG_S = 5mA -- 65 -- mV

PGOO D Pull Down Voltage VPGOOD TBD, IPGOOD = 5mA -- 220 -- mV

EN Threshold Logic-High Voltage VIH 1.5 -- -- V

Logic-Low Voltage V IL -- -- 0.4 V

EN Pin Input Current IEN V

EN = 2V -- -- 2 μA

Protection

Thermal Regulation -- 125 -- °C

OVP SET Internal Default -- 6.5 -- V

RT9513

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Typical Operating Characteristics

ACIN = 0V to 10V, VBATT = 3.7V

ACIN OVP

Time (1ms/Div)

ICHARGE

(0.5A/Div)

VACIN

(5V/Div)

VBATT

(2V/Div)

VOUT

VIN

CHG_S

(5V/Div)

VBATT = 3.7V

ACIN Power On

Time (250μs/Div)

ICHARGE

(0.5A/Div)

VACIN

(5V/Div)

VBATT

(2V/Div)

CHG_S

(5V/Div)

ACIN OVP

Time (1ms/Div)

ICHARGE

(0.5A/Div)

VACIN

(5V/Div)

VBATT

(2V/Div)

VOUT

VIN

ACIN = 5V to 8V to 5V, VBATT = 3.7V

CHG_S

(5V/Div)

VBATT = 3.7V

ACIN Power Off

Time (500μs/Div)

ICHARGE

(0.5A/Div)

VACIN

(5V/Div)

VBATT

(2V/Div)

CHG_S

(5V/Div)

Input Voltage Transition

Time (500μs/Div)

ICHARGE

(1A/Div)

VACIN

(5V/Div)

ACIN Power On

VBATT = 3.7V

CHG_S

(5V/Div)

ACIN Power Off

Input Voltage Transition

Time (500μs/Div)

ICHARGE

(1A/Div)

VACIN

(5V/Div)

VBATT = 3.7V

CHG_S

(5V/Div)

RT9513

DS9513-01 April 2011 www.richtek.com

The parameter KSET = 300 ; VSET = 2.5V. RSETA is the

resistor connected between the ISET A and GND.

Pre- Charge Current Setting

During a charge cycle if the battery voltage is below the

VPRECH threshold, the RT9513 a pplies a pre-charge mode

to the battery . This feature revives deeply discharged cells

and protects battery life. The RT9513 internal determines

the pre-charge rate a s 10% of the fa st-charge current.

Battery Voltage Regulation

The RT9513 monitors the battery voltage through the BA TT

pin. Once the battery voltage level closes to the VREG

threshold, the RT9513 voltage enters constant pha se and

the charging current begins to ta per down. When battery

voltage is over the VREG threshold, the RT9513 will stop

charge and keep to monitor the battery voltage. However,

when the battery voltage decreases 100mV below the

VREG, it will be recharged to keep the battery voltage.

Charge Status Outputs

The open-drain CHG_S and PGOOD outputs indicate

various charger operations a s shown in the following table.

These status pins can be used to drive LEDs or

communicate to the host processor. Note that ON

indicates the open-drain tra nsistor is turned on and LED

is bright.

Application Information

Automatically Power Source Selection

The RT9513 is a battery charger IC which is designed for

Li-ion Battery with 4.2V rated voltage.

AC Mode : When the AC input voltage (ACIN) is higher

tha n the UVP voltage level (4.4V), the R T9513 will enter

AC Mode. In the AC Mode, ACIN P-MOSFET is turned on

a nd USB P-MOSFET is turned off.

Sleep Mode : The RT9513 will enter Sleep Mode when

AC input voltage are removed. This feature provides low

leakage current from the battery during the absence of

input supply.

ACIN Over Voltage Protection

The AC input voltage is monitored by an internal OVP

comparator. The comparator ha s an accurate reference of

2.5V from the ba nd-ga p reference. The OVP threshold is

set by the internal resistive. The protection threshold is

set to 6.5V . When the input voltage exceeds the threshold,

the comparator outputs a logic signal to turn off the power

P-MOSFET to prevent the high input voltage from damaging

the electronics in the handheld system. When the input

over oltage condition is removed (ACIN < 6V), the

comparator re-enables the output by running through the

soft-start.

SET

charge_ac SET SETA

I = K

Figure 1. AC Mode Charge Current Setting

200

400

600

800

1000

1200

0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5

Charge Current (mA )

RSETA (kΩ)

Charge State CHG_S PGOOD

ACIN Charge ON ON

Ch ar ge done OFF ON

Fa st-Charge Current Setting

The RT9513 offers ISET A pin to determine the AC charge

rate from 100mA to 1.2A. The charge current can be

calculated a s following equation.

RT9513

8DS9513-01 April 2011www.richtek.com

Figure 2

Temperature Regulation and Thermal Protection

In order to maximize the charge rate, the RT9513 features a junction temperature regulation loop. If the power dissipation

of the IC results in a junction temperature greater tha n the thermal regulation threshold (125°C), the RT9513 throttle s

ba ck on the charge current in order to maintain a junction temperature around the thermal regulation threshold (125°C).

The RT9513 monitors the junction temperature, TJ, of the die a nd disconnects the battery from the input if TJ exceeds

125°C. This operation continues until junction temperature falls below thermal regulation threshold (125°C) by the

hysteresis level. This feature prevents the chip from da mage.

Selecting the Input and Output Capacitors

In most applications, the most i mporta nt is the high-frequency decoupling capa citor on the input of the RT9513. A 1uF

cera mic ca pacitor , placed in close proximity to input pin a nd GND pin is recommended. In some a pplications depending

on the power supply chara cteristics and ca ble length, it may be necessary to add a n additional 10uF cera mic capa citor

to the input. The RT9513 requires a small output ca pacitor for loop stability . A 1uF cera mic capa citor placed between the

BATT pin a nd G ND is typically suf f icient.

Layout Consideration

The RT9513 is a fully integrated low cost single-cell Li- Ion battery charger ideal for portable a pplications. Careful PCB

layout is necessary. For best performance, place all peripheral components as close to the IC as possible. A short

connection is highly recommended. The following guidelines should be strictly followed when designing a PCB layout

for the RT9513.

`Input ca p a citor should be placed close to IC a nd connected to ground pla ne. The tra ce of input in the PCB should be

pla ced far away the sensitive devices or shielded by the ground.

`The GND should be connected to a strong ground pla ne for heat sinking a nd noise protection.

`The connection of RSETA should be isolated from other noisy traces. The short wire is recommended to prevent EMI and

noise coupling.

`Output ca p a citor should be pla ced close to IC a nd connected to ground plane to reduce noise coupling.

GND

ACIN

GND

CHG_S

PGOOD

BATT

ISETA

RSETA

GND

The capacitor should be

placed close to IC pin and

connected to ground plane.

The GND should be

connected to a strong

ground plane for heat

sinking and noise

protection.

The connection of RSETA

should be isolated from other

noisy traces. The short wire

is recommended to prevent

EMI and noise coupling.

RT9513

DS9513-01 April 2011 www.richtek.com

Richtek Technology Corporation

Headquarter

5F, No. 20, Taiyuen Street, Chupei City

Hsinchu, Taiwan, R.O.C.

Tel: (8863)5526789 Fax: (8863)5526611

Richtek Technology Corporation

Taipei Office (Marketing)

5F, No. 95, Minchiuan Road, Hsintien City

Taipei County, Taiwan, R.O.C.

Tel: (8862)86672399 Fax: (8862)86672377

Email: marketing@richtek.com

Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit

design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be

guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.

Outline Dimension

Dimensions In Millimeters Dimensions In Inch es

Symbol Min Max Min Max

A 0.700 0.800 0.028 0.031

A1 0.000 0.050 0.000 0.002

A3 0.175 0.250 0.007 0.010

b 0.180 0.300 0.007 0.012

D 2.950 3.050 0.116 0.120

D2 2.300 2.650 0.091 0.104

E 2.950 3.050 0.116 0.120

E2 1.500 1.750 0.059 0.069

e 0.500 0.020

L 0.350 0.450

0.014 0.018

W-Type 10L DFN 3x3 Package

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

DETAIL A

Pin #1 ID a nd T ie Bar M ark Options

SEE DETAIL A