Richtek RT9480GQW Schematic [ru]

®

RT9480

Eas y t o U s e Power Bank Solution (EZPBSTM) Integrated Chip
with Two Ports Output

General Description

The RT9480 is a high integration and easy to use power
solution for Li-ion power bank a nd other powered handheld
applications. We call it EZPBSTM (Easy to Use Power
Bank Solution). This single chi p includes a linear charger,
a synchronous Boost with dual output load management
and a torch function support. The battery volume a nd the
state of charging and discharging can be indicated by
4LEDs. The RT9480 is available in the WQFN-24L 4x4
package.

Applications

 Li-ion Power Bank

Ordering Information

RT9480

Serial Number
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 2)

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

TM

EZPBS



 Compact BOM Elements with EZPBS





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



Output Short Protection)



 Support Charging and Discharging at the sa me time



by Smart Algorithm

Charger



 One Linear Charger up to 1.2A





 DPM Function (Dynamic Power Management)





 Thermal Regulation





 Auto-Recharge





 Support JEITA Function



USB Output



 Support Dual USB Output





 Auto and Button Control





 Sync-Boost T otal Output Current up to 2.5A





 Peak Efficiency 97%



Battery State of Charge (SOC) Indicator



 Battery SOC Detection





 Support NTC for Battery Temperature Sensing





 4LEDs for Battery SOC Display



Other Functions



 T orch Functions



(Easy to Use Power Bank Solution)

TM

Single Chip

Simplified Application Circuit

Input Power

C

IN

Battery

Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

©

L1

C1

C

VMID

VBUS

LXBST

VMID
SWIN2

BUTTON

RT9480

DS9480-04 December 2014 www.richtek.com

VBAT

USBOUT1
USBOUT2

LEDx

TORCH

GND

Battery

C

BAT

USB Port 1
USB Port 2
LED Indicator

Torch Function

1

RT9480

Pin Configurations

(TOP VIEW)

Marking Information

For marking information, contact our sales re presentative
directly or through a Richtek distributor located in your
area.

LXBST

VMID

LXBST

21 20 1924 2223

18

USBOUT1

17

USBOUT1

16

SWIN2

15

25

TORCH

USBOUT2

14

NC

13

TP2

TP1

BUTTON

VBAT

TS
LED1
LED2
LED3
LED4

VBUS

PGNDBST

1
2
3
4
5
6

78910 1211

NC

NC

PGNDBST

GND

GND

WQFN-24L 4x4

Product Name List

Serial

Number

Product Name Auto/Button

RT9480GQW Button 4LEDs Disable 4.2V 12 Hours

SOC LED

Number

Programmable

Battery

Regulation

USBOUT Detach

Time Out of

AA01 RT9480GQW-AA01 Auto 4LEDs Disable 4.2V 3sec
AA02 RT9480GQW-AA02 Button 4LEDs Disable 4.35V 12 Hours
AA03 RT9480GQW-AA03 Button 4LEDs Disable 4.2V 3sec
AB01 RT9480GQW-AB01 -- -- Enable -- --

* : Please refer to application note.

-- : Set by program

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©

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Functional Pin Description

Pin No. Pin Name Pin Function

1 VBAT Battery Char ge Cur r ent O utput .
2 TS Battery Temperature Sense Setting.
3 LED1 Current Si nk Output for LE D1.
4 LED2 Current Si nk Output for LE D2.
5 LED3 Current Si nk Output for LE D3.
6 LED4 Current Si nk Output for LE D4.

7, 8, 14 NC No Internal Connection.

9,

25 (Exposed Pad)

10 TORCH Current Si nk Output for Tor c h LE D Function. Open Drain Output
1 1 BUTTON Button Control Input for mode change.
12 TP1 Connected to GND.
13 TP2 Connected to GND.
15 USBOUT2 USB-2 Power Output .

GND

Ground. The exposed pad must be soldered to a large PCB and
connected to G ND for maxim um power di ssipat ion.

RT9480

16 SWIN2 USB-2 Power Input.

17, 18 USBOUT1 USB-1 Power Output .

19 VMID Boost Output.
20, 21 LXBST Boost Switch Output.
22, 23 PGNDBST Boost Power GND.

24 VBUS VBUS Power Supply.

Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

DS9480-04 December 2014 www.richtek.com

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RT9480

Function Block Diagram

VBUS

USBOUT1

USBOUT2

SWIN2

VMID

LXBST

PGNDBST

BUTTON

TORCH

Linear Charger 1.2A

USB-1 Load

Manager Up to 2.1A

USB-2 Load

Manager Up to 1A

Torch Brightness

Control (Open Drain)

Central Control

1. Battery Capacity
Detection

2. Protection

3. LED Display

4. Mode Control

5. Button Operation

VBAT

TS

LED1
LED2

LED3
LED4

TP1
TP2

GND

Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

©

DS9480-04 December 2014www.richtek.com

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Operation

RT9480

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 loa d ma nagement, LED indicator
and torch function.

Change Current

Ba se on thermal regulation function, the charging current
can support up to 1.2A.

VBUS OVP

If the input voltage (VBUS) is higher than the threshold
voltage V
charger will stop charging until VIN is below V

, the internal OVP signal will go high a nd the

OVP

− ΔV

OVP

OVP

VMID OVP

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

, the internal OVP signal will go high a nd the

OVP

charger will stop charging until VMID is below
V

OVP

−ΔV

OVP

.

OCP

The converter senses the current signal when the high­side 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.

OTP

The converter has a n 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.

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.

.

CC/CV/TR Multi Loop Controller

There are constant current loop, consta nt voltage loop and
thermal regulation loop to control the charging current.

T oo 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.

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5

RT9480

Absolute Maximum Ratings (Note 1)

 Supply Voltage, VBAT-------------------------------------------------------------------------------------- −0.3V to 6V
 Supply Voltage, VBUS ------------------------------------------------------------------------------------- −0.3V to 10V
 Supply V oltage 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

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

 Package Thermal Re sistance (Note 2)

WQFN-24L 4x4, θJA-----------------------------------------------------------------------------------------28°C/W
WQFN-24L 4x4, θJC----------------------------------------------------------------------------------------7.1°C/W

 Junction T emperature Range------------------------------------------------------------------------------ 150°C
 Lead T e mperature (Soldering, 10 sec.)-----------------------------------------------------------------26 0°C
 Storage T emperature Range ------------------------------------------------------------------------------ −65°C to 150°C
 ESD Susceptibility (Note 3)

HBM (Human Body Model)-------------------------------------------------------------------------------- 2kV
MM (Machine Model) --------------------------------------------------------------------------------------- 200V

@ TA = 25°C

D

Recommended Operating Conditions

 Supply Input V oltage, VBAT, VBUS ---------------------------------------------------------------------2.8V to 5.5V
 Junction T emperature Range------------------------------------------------------------------------------ −40°C to 125°C
 Ambient T emperature Range------------------------------------------------------------------------------ −40°C to 85°C

(Note 4)

Electrical Characteristics

TOP Unit Electrical Characteristics

(V

= 5V, V

BUS

Supply Input

Battery Quiescent Current
for Standby

= 3.7V, T

BAT

= 25°C, unless otherwise specified)

A

Parameter Symbol Test Conditions Min Typ Max Unit

I

BAT_sdy

No VBUS, Boost
on, Indicator Off.

Button Mode -- 30 -- A

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6