RT9480中文资料_数据手册_规格书

®

RT9480

Easy to Use Power Bank Solution (EZPBS^TM) Integrated Chip

with Two Ports Output

General Description

Features

EZPBS^TM(Easy to Use Power Bank Solution)

^Compact BOM Elements with EZPBS^TMSingle Chip

^Protection Functions (OTP, OVP, OCP, VBUS and

Output Short Protection)

The RT9480 is a high integration and easy to use power

solution for Li-ion power bank and other powered handheld

applications. We call it EZPBS^TM(Easy to Use Power

Bank Solution). This single chip includes a linear charger,

a synchronous Boost with dual output load management

and a torch function support. The battery volume and the

state of charging and discharging can be indicated by

4LEDs. The RT9480 is available in the WQFN-24L 4x4

package.

^Support Charging andDischarging at the same time

by Smart Algorithm

Charger

^One Linear Charger up to 1.2A

^DPM Function (Dynamic Power Management)

^Thermal Regulation

Applications

 Li-ion Power Bank

 Auto-Recharge

 Support JEITA Function

Ordering Information

RT9480

USB Output

 Support Dual USB Output

 Auto and Button Control

 Sync-Boost Total Output Current up to 2.5A

^Peak Efficiency 97%

Serial Number

Package Type

QW : WQFN-24L 4x4 (W-Type)

(Exposed Pad-Option 2)

Lead Plating System

Battery State of Charge (SOC) Indicator

 Battery SOC Detection

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :

 Support NTC for Battery Temperature Sensing

 4LEDs for Battery SOC Display

 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.

Other Functions

 Torch Functions

Simplified Application Circuit

VBAT

Input Power

VBUS

Battery

RT9480

C

IN

C

BAT

L1

Battery

LXBST

USBOUT1

USBOUT2

LEDx

USB Port 1

USB Port 2

LED Indicator

C1

VMID

SWIN2

C

VMID

TORCH

GND

Torch Function

BUTTON

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RT9480

Pin Configuration

Marking Information

(TOP VIEW)

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

24 23 22 21 20 19

1

2

3

18

17

16

VBAT

TS

LED1

LED2

LED3

LED4

USBOUT1

SWIN2

USBOUT2

NC

GND

4

5

6

15

14

13

25

TP2

7

8

9 10 11 12

WQFN-24L 4x4

Product Name List

Serial

SOC LED

Number

Battery

Time Out of

Product Name

Number

Auto/Button

Programmable

Regulation USBOUT Detach

RT9480GQW

Button

Auto

4LEDs

Disable

4.2V

12 Hours

3sec

AA01

AA02

AA03

RT9480GQW-AA01

RT9480GQW-AA02

RT9480GQW-AA03

Button

4.35V

4.2V

12 Hours

3sec

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DS9480-05 February 2017

RT9480

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

VBAT

Battery charge current output.

2

TS

Battery temperature sense setting.

Current sink output for LED1.

Current sink output for LED2.

Current sink output for LED3.

Current sink output for LED4.

No internal connection.

3

LED1

LED2

LED3

LED4

NC

4

5

6

7, 8, 14

9,

Ground. The exposed pad must be soldered to a large PCB and

connected to GND for maximum power dissipation.

GND

25 (Exposed Pad)

10

11

TORCH

BUTTON

TP1

Current sink output for torch LED function. Open drain output

Button control input for mode change.

Connected to GND.

12

13

TP2

Connected to GND.

15

USBOUT2

SWIN2

USBOUT1

VMID

USB-2 power output.

16

USB-2 power input.

17, 18

19

USB-1 power output.

Boost output.

20, 21

22, 23

24

LXBST

PGNDBST

VBUS

Boost Switch output.

Boost power GND.

VBUS power supply.

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RT9480

Functional Block Diagram

Linear Charger 1.2A

VBAT

VBUS

USB-1 Load

Manager Up to 2.1A

USBOUT1

USBOUT2

TS

USB-2 Load

Manager Up to 1A

SWIN2

VMID

Central Control

1. Battery Capacity

Detection

2. Protection

3. LED Display

4. Mode Control

5. Button Operation

LXBST

LED1

LED2

LED3

LED4

PGNDBST

BUTTON

TORCH

TP1

TP2

Torch Brightness

Control (Open Drain)

GND

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DS9480-05 February 2017

RT9480

Operation

The RT9480 is a high integrated IC for Li-Ion battery power

bank. It includes a linear charger 1.2A, a synchronous

Boost 5.1V, two output load management, LED indicator

and torch function.

OTP

The converter has an over-temperature protection. When

the junction temperature is higher than the thermal

shutdown rising threshold, the system will be latched and

the output voltage will no longer be regulated until the

junction temperature drops under the falling threshold.

Change Current

Base on thermal regulation function, the charging current

can support up to 1.2A.

Output Short Protection

When output short to ground, the system will be latched

and the output voltage will no longer be regulated until

power reset.

VBUS OVP

If the input voltage (VBUS) is higher than the threshold

voltage V_OVP, the internal OVP signal will go high and the

charger will stop charging until VINis below V_OVP− ΔV_OVP

.

CC/CV/TR Multi Loop Controller

There are constant current loop, constant voltage loop and

thermal regulation loop to control the charging current.

VMID OVP

If the internal voltage (VMID) is higher than the threshold

voltage V_OVP, the internal OVP signal will go high and the

charger will stop charging until VMID is below

Too Hot or Too Cold

The temperature sense input TS pin can be connected a

thermistor to determine whether the battery is too hot or

too cold for charging operation. If the battery's temperature

is out of range, charging is paused until it re-enters the

valid range.

V_OVP−ΔV_OVP

.

OCP

The converter senses the current signal when the high-

side P-MOSFET turns on. As a result, The OCP is cycle

by-cycle current limitation. If the OCP occurs, the converter

holds off the next on pulse until inductor current drops

below the OCP limit.

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RT9480

Absolute Maximum Ratings (Note 1)

 Supply Voltage, VBAT-------------------------------------------------------------------------------------- −0.3V to 6V

 Supply Voltage, VBUS ------------------------------------------------------------------------------------- −0.3V to 10V

 Supply Voltage USBOUT1, USBOUT2 Pulse (100μs) ---------------------------------------------- −0.3V to 10V

 LED Output Voltage, LED1, LED2, LED3, LED4 ---------------------------------------------------- −0.3V to 10V

 TORCH --------------------------------------------------------------------------------------------------------- −0.3V to 10V

 Other Pins----------------------------------------------------------------------------------------------------- −0.3V to 6V

 Power Dissipation, P_D@ T_A= 25°C

WQFN-24L 4x4 ---------------------------------------------------------------------------------------------- 3.57W

 Package Thermal Resistance (Note 2)

WQFN-24L 4x4, θ_JA----------------------------------------------------------------------------------------- 28°C/W

WQFN-24L 4x4, θ_JC---------------------------------------------------------------------------------------- 7.1°C/W

 Junction Temperature Range------------------------------------------------------------------------------ 150°C

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

 Storage Temperature Range ------------------------------------------------------------------------------ −65°C to 150°C

 ESD Susceptibility (Note 3)

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

MM (Machine Model) --------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions (Note 4)

 Supply Input Voltage, VBAT, VBUS --------------------------------------------------------------------- 2.8V to 5.5V

 Junction Temperature Range------------------------------------------------------------------------------ −40°C to 125°C

 Ambient Temperature Range------------------------------------------------------------------------------ −40°C to 85°C

Electrical Characteristics

TOP Unit Electrical Characteristics

(V_BUS= 5V, V_BAT= 3.7V, T_A= 25°C, unless otherwise specified)

Parameter

Supply Input

Symbol

Test Conditions

Min

Typ Max Unit

Battery Quiescent Current for

Standby

No VBUS, Boost on,

Indicator Off.

I_{BAT_sdy}

Button Mode

--

30

--

A

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DS9480-05 February 2017

RT9480

Charger Unit Electrical Characteristics

(V_BUS= 5V, V_BAT= 3.7V, T_A= 25°C, unless otherwise specified)

Parameter

Supply Input

Symbol

Test Conditions

Min

Typ Max Unit

VBUS  VBAT VOS Rising

VBUS  VBAT VOS Falling

Battery Charger

V_{OS_H}

--

100

50

200

--

mV

V_{OS_L}

10

VBUS Operating Range

VBUS Regulation

V_{BUS_CHG}

DPM

4.5

--

5.5

5

V

V_DPM= 4.5V

5

%

Voltage Regulation

VBAT Regulation

V_REG

T_A= 0 to 85C, V_REG= 4.2V

V_REG Recharge level

I_BAT= 1A

1

--

1

--

%

Re-Charge Threshold

VBUS Power FET R_DS(ON)

Current Regulation

V_RECHG

R_{DS(ON)_chg}

150

200

mV

m

--

300

Fast-Charge Current Accuracy I_CHG

I_CHG= 1.2A

5

5.5

--

5

%

V

Pre-Charge Current Accuracy I_{CHG_Pre}

Ratio of Fast-Charge current

V_BATrising

10

2.5

14.5

2.65

Pre-Charge Threshold

V_pre

2.35

Pre-Charge Threshold

Hysteresis

V_pre

V_BATfalling

120

200

280

mV

Charge Termination Detection

Termination Current Ratio

Timer

I_TERMI

--

10

24

--

%

Fast-Charge Time Fault

T_{F_CC}

hour

Boost Unit Electrical Characteristics

(V_BUS= 5V, V_BAT= 3.7V, T_A= 25°C, unless otherwise specified)

Parameter

Supply Input

Symbol

Test Conditions

Min

Typ Max Unit

Output Voltage

V_OUTBST

--

5

--

5.1

--

5

V

%

A

Output Voltage Accuracy

MAX Output Current

PFET Peak Current Limit

Power Switch

As V_BAT> 3.3V, V_OUT= 5V

2.5

--

I_OCP

6

A

Switching Frequency

Protection

f_SW

0.2

0.25

0.3

MHz

Over-Voltage Protection

V_{MID_OVP}

5.6

--

5.7

0.2

6

V

Over-Voltage Protection

Hysteresis

V_{MID_OVP_hys}

--

Under-Voltage Protection

(Short-Circuit Protection)

V_{BST_FBUV}

--

3.37

--

V

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RT9480

Others Electrical Characteristics

(V_BUS= 5V, V_BAT= 3.7V, T_A= 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

--

Typ Max Unit

LED

LED Current Sink

Torch

I_LED

0.75

200

--

mA

mV

Open-Drain Low Voltage

Button

V_{ODL_T}

I_SINK= 5mA

--

Logic-High V_{IH_B}

Logic-Low V_{IL_B}

High-Level T_{Press_H}

Low-Level T_{Press_L}

1.5

--

0.4

--

V

Button Control

0.1

sec

Press Duty Time

--

Protection

Charger Thermal Regulation

Over-Temperature Protect

T_REG

T_OTP

For charger

--

105

150

--

°C

Over-Temperature Protect

Hysteresis

T_OTP

--

6.5

--

20

6.8

200

--

°C

V

VBUS OVP Threshold Voltage V_OVP

VBUS OVP Threshold Voltage

V_BUSrising

V_BUSfalling

7.1

280

V_{OVP_Hys}

mV

Hysteresis

BASE

VBUS Attached Threshold

Voltage

V_{BUS_ATT}

V_BUSrising

3.8

--

4

4.2

V

VBUS Attached Threshold

Voltage Hysteresis

V_{BUS_ATT_Hys}V_BUSfalling

200

280

mV

Note 1. Stresses beyond those listed “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 in

the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may

affect device reliability.

Note 2. θ_JAis measured at T_A= 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.

Note 3. Devices are ESD sensitive. Handling precaution is recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.

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DS9480-05 February 2017

RT9480

Typical Application Circuit

RT9480

24

1

Input Power

VBUS

VBAT

TS

C

BAT

IN

1µF/25V

10µF

+

-

R

NTC

10k

2

16

19

SWIN2

VMID

Semitec

103AT

17, 18

USB1

Output

Li-Bat

Prot-IC

USBOUT1

N-MOSFET

C

VMID

C

1µF

OUT1

22µF x2

15

USB2

Output

USBOUT2

C

OUT2

L1

1µH

1µF

20, 21

22, 23

V

LXBST

BAT

V

BAT

C1

D1

10µF

3

4

5

6

LED1

PGNDBST

D2

D3

D4

LED2

LED3

Power

Display

Button

11

BUTTON

TP1

V

BAT

100k

R2

12

13

LED4

100k

R3

R1

D6

TP2

10

TORCH

VMID

9, 25 (Exposed Pad)

GND

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RT9480

Typical Operating Characteristics

USBOUT Voltage vs. Load Current

USBOUT Efficiency vs. Load Current

6.0

5.5

5.0

4.5

4.0

3.5

3.0

100

90

80

V_BAT= 3.9V

V_BAT= 3.7V

70

60

50

40

30

20

10

0

V_BAT= 3.3V

V_BAT= 3.7V

V_BAT= 3.9V

USBOUT = 5.1V

1500 2000 2500

USBOUT = 5.1V, L = 1μH, C_OUT= 1μF

0

500

1000

0

500

1000

1500

2000

2500

Load Current (mA)

USBOUT Voltage vs. Temperature

VBUS OVP Threshold Voltage vs. Temperature

7.2

5.5

5.4

5.3

5.2

5.1

5.0

4.9

4.8

4.7

4.6

4.5

7.0

6.8

6.6

6.4

6.2

6.0

Rising

Falling

V_BAT= 3.3V

V_BAT= 3.7V

V_BAT= 3.9V

VBAT = Real Battery

50 75 100 125

USBOUT = 5.1V

75 100 125

-50

-25

0

25

-50

-25

0

25

50

Temperature (°C)

Battery Regulation Voltage vs. Temperature

ICHG Thermal Regulation vs. Temperature

4.25

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

0

4.22

4.19

4.16

4.13

4.10

105°C

V_IN= 5V, VBAT = Real Battery

-50 -25 25 50

-50

-25

0

25

50

75

100

125

0

75

100

125

Temperature (°C)

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DS9480-05 February 2017

RT9480

Application Information

The RT9480 is a high integrated IC for Li-Ion battery power

bank. This chip includes a linear charger, a synchronous

Boost, two output load management, LED indicator and

torch function.

battery in order to maintain thermal regulation at around

105°C. This operation continues until the junction

temperature falls below the thermal regulation threshold

(105°C) by the hysteresis level. This feature prevents the

maximum power dissipation from exceeding typical design

conditions.

Pre-Charge Mode

When the output voltage is lower than 2.3V, the charging

current will be reduced to a fast-charge current ratio to

protect the battery life time.

Time Fault

The Fast-Charge Fault Time is set by 24hours.

When time fault happens, the charger cycle will be turned

off charging function.

Fast-Charge Mode

When the output voltage is higher than 2.5V, the charging

current will be equal to the fast-charge current with 1.2A.

Battery Pack Temperature Monitoring

The RT9480 features an external battery pack temperature

monitoring input. The TS input connects to the NTC

thermistor in the battery pack to monitor battery

temperature and prevent danger over temperature

conditions. If at any time the voltage at TS falls outside of

the operating range, charging will be suspended. TheNTC

thermistor recommends using 10kΩ.

Constant-Voltage Mode

When the output voltage is near 4.2V or 4.35V, the charging

current will fall below the termination current.

Re-Charge Mode

When the chip is in charge termination mode, the charging

current will gradually go down to zero. However, once the

voltage of the battery drops to below 4.05V or 4.2V, then

the charging current will resume again.

JEITA Function

For JEITAbattery temperature standard :

Charge Termination

CV regulation voltage will change at the following battery

Temp ranges 45°C to 60°C.

When the charge current is lower than the charge

termination current ratio (10%) for V_BAT> 4.05V or 4.2V

and the time is larger than the deglitch time (25ms), it will

be latched high unless the power is re-toggled.

4.35V or 4.2V

4.2V or 4.05V

100% Ichg

Input DPM Mode

If the input voltage is lower than V_DPM(4.5V), the input

current limit will be reduced to stop the input voltage from

dropping any further. This can prevent the IC from damaging

improperly configured or inadequately designed USB

sources.

50% Ichg

0

C

10

C

45C 60C

Temperature Regulation

Synchronous Step-Up

In order to maximize charge rate, the RT9480 features a

junction temperature regulation loop. If the power

dissipation of the IC results in junction temperature greater

than the thermal regulation threshold (105°C), the RT9480

will cut back on the charge current and disconnect the

The converter operates in fixed frequency PWM Mode

with 250kHz, Continuous Current Mode (CCM), and

Discontinuous Current Mode (DCM) with internal

MOSFETs.

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RT9480

Operation Method

Button Mode

Charge Mode : VBUS in and charging battery

Button mode : When external handheld device plug in for

power bank, the USBOUT will turns on by button.

Discharge Mode : USBOUT in and discharging for handheld

If device attched, RT9480 will count 12 hours

(RT9480GQW or AA02) or 3sec (AA01 or AA03) to turn

off USBOUT after detach.

Chg-Dchg Mode : VBUS and USBOUT in, charging battery

and discharging handheld at the same time

Relax Mode : VBUS and USBOUT plug out

 AA01 and AA03. Please reference Product Name List.

 Attach mean device plug in and loading > 100mA.

 Detach mean device plug out and loading < 50mA.

Button Function

Function

Button

Action

Description

After plugging in the external power source, the power

bank will be charged automatically without pressing the

button, and the LED battery indicator lights up at the

same time.

Micro-USB Adapter

plug-in : ON

Charging

NA

After unplugging the external power source, the power

bank stops being charged automatically without pressing

the button, and the LED battery indicator fades out at the

same time.

Micro-USB Adapter

plug-out : OFF

After plugging in the H/H device and pressing the button,

the power bank starts to charge the device.

USB slave plug-in : ON

0.1s

Discharging

After unplugging the H/H device, the power bank stops

USB slave plug-out : OFF charging the device automatically without pressing the

button.

Press the button (short

press) one time : ON

Press the button (short press), the LED battery indicator

lights up.

0.1s

Check Battery

Capacity

After 20sec : OFF

After 20sec, the LED battery indicator fades out.

Double click the button

(short press) : ON

Double click the button (short press), the torch light lights

up.

0.1s 0.1s

Torch

Double click the button

(short press : OFF

Double click the button (short press) again, the torch light

fades out.

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DS9480-05 February 2017

RT9480

BUTTON Press Timing

LED Indicator Function

Define Button (Short/Long) Press Timing

About LED indicator, it will follow below table to show

SOC. The LED current is 0.75mA.

Short press = min (0.1s)

●●●●

Low→High

● : LED ON, ○ : LED OFF, ● : LED FLASH

Blank = min (0.1s)

Battery Voltage

Operation of Charging

SOC LED Flash and Running Timing

●○○○

●●○○

●●●○

●●●●

SOC LED Flash

 3700mV

0.5s

●●○○

●●●○

●●●●

 3700mV

 3940mV

SOC LED Running

0.5s

●●●○

●●●●

 3940mV

 4100mV

0.5s

 4100mV

 4200mV

●●●●

4200mV

Battery Voltage

Operation of Discharging

●●●●

 4200mV

 3880mV

 3880mV

 3720mV

●●●○

 3720mV

 3500mV

●●○○

 3500mV

 3200mV

 3200mV

 2800mV

●○○○

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RT9480

Thermal Considerations

Layout Consideration

For continuous operation, do not exceed absolute

maximum junction temperature. The maximum power

dissipation depends on the thermal resistance of the IC

package, PCB layout, rate of surrounding airflow, and

difference between junction and ambient temperature. The

maximum power dissipation can be calculated by the

following formula :

The PCB layout is an important step to maintain the high

performance of the RT9480.

Both the high current and the fast switching nodes demand

full attention to the PCB layout to save the robustness of

the RT9480 through the PCB layout. Improper layout might

show the symptoms of poor line or load regulation, ground

and output voltage shifts, stability issues, unsatisfying

EMI behavior or worsened efficiency.For the best

performance of the RT9480, the following PCB layout

guidelines must be strictly followed.

P_D(MAX)= (T_J(MAX)− T_A) / θ_JA

where T_J(MAX)is the maximum junction temperature, T_Ais

the ambient temperature, and θ_JAis the junction to ambient

thermal resistance.

 Place the input and output capacitors as close as

possible to the input and output pins respectively for

good filtering.

For recommended operating condition specifications, the

maximum junction temperature is 125°C. The junction to

ambient thermal resistance, θ_JA, is layout dependent. For

WQFN-24L 4x4 package, the thermal resistance, θ_JA, is

28°C/W on a standard JEDEC 51-7 four-layer thermal test

board. The maximum power dissipation at T_A= 25°C can

be calculated by the following formula :

 Care should be taken for a proper thermal layout. Wide

traces, connecting with vias through the layers, provides

a proper thermal path to sink the heat energy created

from the device and inductor. Keep the main power traces

as wide and short as possible. Recommend as below :

P_D(MAX)= (125°C − 25°C) / (28°C/W) = 3.57W for

WQFN-24L 4x4 package

VBUS trace > 40mil;

VBAT trace > 80mil;

LXBST trace > 80mil;

VMID trace > 40mil;

The maximum power dissipation depends on the operating

ambient temperature for fixed T_J(MAX)and thermal

resistance, θ_JA. The derating curve in Figure 1 allows the

designer to see the effect of rising ambient temperature

on the maximum power dissipation.

USBOUT1 trace > 80mil;

USBOUT2 trace > 40mil.

4.0

 The switching node area connected to LX and inductor

Four-Layer PCB

should be minimized for lower EMI.

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

 Connect theGNDpin, PGNDBST pin and Exposed Pad

together to a strong ground plane for maximum thermal

dissipation and noise protection.

 Directly connect the output capacitors to the feedback

network of each channel to avoid bouncing caused by

parasitic resistance and inductance from the PCB trace.

0

25

50

75

100

125

Ambient Temperature (°C)

Figure 1. Derating Curve of Maximum PowerDissipation

©

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

14

DS9480-05 February 2017

RT9480

LX should be connected to Inductor by

wide and short trace, keep sensitive

compontents away from this trace

GND

VBAT

VMID

C_MID

GND

C_BAT

C1

GND

VBUS

Input capacitors

must be placed

as close as

possible to the

Input pins.

C_IN

L1

C_OUT1

24 23 22 21 20 19

Output

VBAT

TS

1

2

3

4

5

6

USBOUT1

18

17

capacitors must

be placed as

close as

USBOUT1

VMID

R_NTC

D1

D2

D3

D4

possible to the

Output pins.

VBAT

LED1

16 SWIN2

15 USBOUT2

14 NC

GND

USBOUT2

C_OUT2

LED2

LED3

LED4

TP2

13

R3

7

8

10 11 12

9

R2

R1

D6

Connect GND

Pin and PGND

Pin to Exposed

Pad.

VMID

GND

Connect the Exposed Pad to a ground

plane.

Figure 2. PCB Layout Guide

©

is a registered trademark of Richtek Technology Corporation.

DS9480-05 February 2017

www.richtek.com

15

RT9480

Outline Dimension

D2

SEE DETAIL A

L

D

1

E

E2

1

2

1

2

e

b

DETAILA

A

Pin #1 ID and Tie Bar Mark Options

A3

A1

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

but must be located within the zone indicated.

Dimensions In Millimeters

Dimensions In Inches

Symbol

Min

Max

Min

Max

A

A1

A3

b

0.700

0.000

0.175

0.180

3.950

2.400

2.650

3.950

2.400

2.650

0.800

0.050

0.250

0.300

4.050

2.500

2.750

4.050

2.500

2.750

0.028

0.000

0.007

0.156

0.094

0.104

0.156

0.094

0.104

0.031

0.002

0.010

0.012

0.159

0.098

0.108

0.159

0.098

0.108

D

Option 1

D2

E2

Option 2

E

Option 1

Option 2

e

L

0.500

0.020

0.350

0.450

0.014

0.018

W-Type 24L QFN 4x4 Package

Richtek Technology Corporation

14F, No. 8, Tai Yuen 1^stStreet, Chupei City

Hsinchu, Taiwan, R.O.C.

Tel: (8863)5526789

Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should

obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot

assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be

accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third

parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.

www.richtek.com

16

DS9480-05 February 2017

Status：	Active	Vin (min) (V)：	2.8
Vin (max) (V)：	5.5	Battery Charge Voltage (max) (V)：	4.2
Battery Charge Current (max) (A)：	1.2	Input Source：	USB
Features：	OCP;OVP;UVP	Package Type：	WQFN4x4-24

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RT9480

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