IP5416

TWS Bluetooth Earphone Charging Box SOC

integrated with 500mA charger and 200mA discharger
 Over temperature protection
1. Features  Vin pin can withstand up to 12V(transient
voltage)
 Discharge  ESD 2KV
 200mA Synchronous Boost Conversion
 Up to 95%@5V/200mA discharge efficiency 2. Applications
of synchronous switch
 TWS Bluetooth Earphone Charging Box
 Built-in power path management supports
charging and discharging at the same time
 Charge
3. Description
 Max 500mA linear charger, charging current IP5416 is a multi-functional power management
can be customized SOC for total solution on TWS Bluetooth Earphone
 Adjusts charging current automatically to Charging Box. It integrates with 5V boost converter,
adapt to different load capacity adapters lithium battery charging management and battery level
 Supports 4.20V, 4.30V 4.35V, 4.40V indicators.
batteries.Standard product 4.20V, other IP5416 is highly integrated with abundant
voltages need to be customized functions,support boost with one single inductor,which
 Battery indicators makes the total solution with minimized-size and low-
 Supports 2/1 LED battery indicator cost BOM.
 Output enable The synchronous 5V-boost system of IP5416
 Support output enable control, can be provides rated 200mA output current with conversion
matched with Hall device efficiency up to 95%,can support low-cost inductors
 Low-power dissipation and capacitors.
 Automatically detect earphone plugged-in/ IP5416’s linear charger supplies max 500mA
plugged-out/charger-end, Automatically charging current. With the change of IC temperature
enter standby mode and input voltage, IP5416 can automatically adjust the
 Standby power consumption up to 10uA charging current.
minimum IP5416 can detects the TWS earphone plug-
 Simplified BOM in/plug-out in the Chargering Box independently. While
 Built-in power MOS, only a few peripheral the earphone is put in the Chargering Box, it enters the
devices are needed in the complete charging discharging mode automaticaly. When the earphone is
and discharging scheme fully charged, the Chargering Box automatically enters
 Multiple protection, high reliability the sleep state, and the standby current can be reduced
 Output：over current and short circuit to 10uA.
protection IP5416 can support 2/1 LED battery indicator.
 Input：over voltage protection and Battery IP5416 is packaged with SOP8.
over charged protection

http://www.injoinic.com/ 1 / 13 Version 1.0

 IP5416
1 8 VOUT
KEY VOUT
D1
phone1 phone2
HALL BAT
V+ 1 D2
2 7 inductor
GND
V- 2 GND HALL LX
+
Out 3 HALL -
BAT
IP5416
2 GND 6
1 GND 3 LN GND
10 GND
LIGHTNI
NG 9 DAT2 4 5
5 DAT1 VIN BAT
6 VIN

VIN

GND
Micro USB

Figure1 IP5416 Simplified Application Diagram

4. Pin Definition

Figure2 IP5416 Pin Assignments

Pin Num Pin Name Description

1 KEY Key,reused as drive LED1 function
2 HALL HALL switch output signal
3 LN Lightning decoding pin
4 VIN 5V input pin
5 BAT Battery charging pin, connected to the battery positive
6 GND Ground
7 LX DCDC switch node
8 VOUT Boost 5V output

V1.0 Email: service@injoinic.com 2 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
5. IP5416 IC Products List
Light load
Charging Standby VOUT Key shut down/ HALL lightning
IC part No. LED Mode
Current voltage Mode light off
Time
Single
start Support Support
IP5416_BT 300mA 2.4V 2 8S
Single
close
Single
start Support Support
IP5416_CK 300mA 5V 2 8S
Single
close

6. IP Series TWS Charging IC Products List

V1.0 Email: service@injoinic.com 3 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
7. Absolute Maximum Ratings
Parameter Symbol Value Unit
Input Voltage Range VIN -0.3 ~ 12 V
Junction Temperature Range TJ -40 ~ 150 ℃
Storage Temperature Range Tstg -60 ~ 150 ℃
Thermal Resistance
θJA 90 ℃/W
(Junction to Ambient)
ESD (Human Body Model) ESD 2 KV
*Stresses beyond these listed parameter may cause permanent damage to the device.
Exposure to Absolute Maximum Rated conditions for extended periods may affect device reliability.

8. Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit

Input Voltage VIN, VBUS 4.5 5 5.8 V

Operating Temperature TA 0 -- 70 ℃
*Device performance cannot be guaranteed when working beyond these Recommended Operating Conditions.

9. Electrical Characteristics
Unless otherwise specified, TA=25℃，L=2.2uH
Parameter Symbol Test Conditions Min. Typ. Max. Unit

Charging System

Input Voltage VIN VBAT=3.7V 4.5 5 5.8 V

Input under voltage VINUV VBAT=3.7V 4.5 V

Input Over Voltage VINOV VBAT=3.7V 5.6 5.8 6.0 V

CV4.2V 4.2V battery 4.15 4.20 4.24 V

CV4.30V 4.3V battery 4.28 4.30 4.34 V

Constant Charge Voltage
CV4.35V 4.35V battery 4.33 4.35 4.4 V

CV4.4V 4.4V battery 4.38 4.40 4.44 V

Charge Stop Current Ivinstop VIN=5V 30 40 mA

Charge Current IVIN VIN=5V, VBAT=3.7V,Iset=300mA 275 300 325 mA

Trickle Charge Current ITRKL VIN=5v，VBAT=2.7V,Iset=300mA 30 mA

Trickle Charge Stop
VTRKL 2.9 3 3.1 V
Voltage

V1.0 Email: service@injoinic.com 4 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
Boost System

Battery Operation Voltage VBAT 3.1 3.7 4.4 V

Low Power Shutdown
VBATLOW IOUT=200mA 3.0 3.1 3.2 V
Voltage
VBAT=3.7V @0A 5.05 5.15 5.25 V
DC Output Voltage VOUT
VBAT=3.7V @200mA 5.0 5.05 5.15 V

Output Voltage Ripple ΔVOUT VBAT=3.0V~4.4V @200mA 50 100 150 mV

Boost Output Current Ivout VBAT=3.0V~4.4V 0 200 300 mA

Boost Overcurrent Shut
Ishut VBAT=3.0V~4.4V 0.4 0.8 A
Down Threshold
VBAT=3.7V, The load current of
Light load shutdown
IPLOUT both headphones must be less 5 mA
threshold
than Iplout to shut down.
Load Over current Detect Duration of output voltage under
TUVD 30 ms
Time 4.2V
Load short circuit Detect Duration of output voltage under
20 us
Time Battery voltage
Control System

Switch Frequency fs Discharge switch frequency 0.9 1.1 1.3 MHz

PMOS On Resistance 450 mΩ

rDSON
NMOS On Resistance 550 mΩ
Battery Input Standby
ISTB1 VIN=0V,VBAT=3.7V,VOUT=2.4V/0V 11 uA
Current 1
Battery Input Standby
ISTB2 VIN=0V,VBAT=3.7V,VOUT=5.0V 12 uA
Current 2
LED Driving Current ILED 4 6 8 mA
Light Load Shut Down
TloadD Load current less than IPLOUT 6 8 10 s
Detect Time
Short Press On Key Wake TOnDebou
100 500 ms
Up Time nce

Long Press On Key Wake

TKeylight 2 3 s
Up Time
Thermal Shut Down
TOTP Rising temperature 130 140 150 ℃
Temperature
Thermal Shut Down
ΔTOTP 30 40 50 ℃
Hysteresis

V1.0 Email: service@injoinic.com 5 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
10. Function Description

System Diagram

5V
+ 2.2uH
-
BAT LX VOUT

Boost LOAD
Control DETECT
Bandgap
OP

Linear SYSTEM
Chager&OVP CONTROL

VIN LED KEY Richg

GND

LED1 LED2 KEY

Figure3 IP5416 Internal System Diagram

Boost

IP5416 integrates a boost dc-dc converter with 5V/200mA output. To avoid large rush current causing device
failure , it is built in overcurrent, short circuit, overvoltage and over temperature protection
function, ensuring the reliability and stability of system operation. According to the IC temperature, IP5416 boost
system can intelligently adjust output current, ensuring the IC temperature is below the set temperature.

Figure4 IP5416 Boost Efficiency Curve

V1.0 Email: service@injoinic.com 6 / 13 Copyright © 2021, Injoinic Corp.

 IP5416

Figure5 IP5416 Boost Output V-I Curve

Charge

IP5416 integrates a linear lithium battery charger. When the battery voltage is less than 3V, precharge with
20mA+Iset *5%. when the battery voltage is greater than 3V, enter constant current CC charging.when the battery
voltage is close to 4.2V/4.3V/4.35V/4.4V, enter constant voltage charging.
IP5416 supports max 500mA linear charging, According to the IC temperature and input voltage, IP5416 can
intelligently adjust charging current.I
2.2uH

BAT LX VOUT

VIN CHARGER BOOST

Figure6 IP5416 Power Path Diagram

Battery level display

IP5416 has a built-in power algorithm, which can accurately display the remaining battery power according to
the cell capacity.
IP5416 can support 1/2LED battery indicator.

V1.0 Email: service@injoinic.com 7 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
LED light display mode

Connect to
other circuits
D1
2LED KEY

Connect to
other circuits
D2
HALL

Connect to
other circuits
KEY
1LED Connect to
other circuits
D1
HALL

Figure7 LED Mode Seleciton Circuit

Note:IP5416 can’t automatically identify 1/2 LED modes ,1/2 LED modes needs to be customized separately.

◼ 2 LED Mode
state D1 D2
charge charging 0.5Hz blink off
full on off
discharge dischareging off on
low off 1Hz blink

◼ 1 LED Mode
state D1
charge charging 0.5Hz blink

full on
discharge dischareging on
low 1Hz blink

KEY Function

IP5416 support single start, single close

Short press (pressed time in range of 100ms~2s): turn on the battery level display LED and BOOST output.
Long press (pressed time longer than 2s): No response

V1.0 Email: service@injoinic.com 8 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
KEY

Figure8 Key circuit

Hall function

IP5416 can identify the change of output level of hall device and control the output,when earphone charging
box is open, the earphone automatically turns on and connects back to the mobile phone.
⚫ The signal level types of Hall devices supported by IP5416 standard models are: when the earphone
charging box is opened, hall outputs high level, when the earphone charging box is closed, hall outputs
low level.
When hall level is high:VOUT output 0V, earphone starts automatically.
When hall level is low:VOUT output 5V, earphone is charging.
⚫ For other types of Hall devices, please contact the injoinic technical support department
BAT
HALL
1
V+
Out 3 HALL HALL
V- 2 GND

Figure9 HALL circuit

Light load standby instructions

Hall changes from high level to low level(Earphone charging box close),IP5416 automatically enters the
discharging mode to charge the earphone, when the earphone is fully charged, IP5416 automatically enters the
sleep state.
When the earphones are charged end, IP5416_BT series will enter standby mode and the VOUT output will
change to 2.4V.
When the earphones are charged end, IP5416_CK series will enter standby mode and the VOUT output will
change to 5V.
Hall changes from low level to high level(Earphone charging box open), IP5416 automatically close output and
plug-in/plug-out detection.

V1.0 Email: service@injoinic.com 9 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
11. Typical Application Diagram
Total solution of IP5416 charging Box is merely realized by passive devices of inductors, capacitors and resistors.
The value of R1 / R2 in the figure can be selected by the customer according to the brightness of the required
lamp.
1 8 VOUT
KEY VOUT
R1 D1 2.2uF
phone1 phone2
HALL BAT
R2
V+ 1 D2
2 7 2.2uH
V- 2 GND HALL LX GND
300K +
Out 3 HALL BAT
-
IP5416
2 GND 6
GND
1 GND
3 LN GND
0
LIGHT
ING 9 DAT2 3K
4 5
5 DAT1 VIN BAT
6 VIN 2.2uF
0.22uF
VIN

GND
Micro USB

Figure10 2LED Mode Typical Application Diagram

1 8 VOUT
KEY VOUT
2.2uF
HALL BAT phone1 phone2
R1 D1
V+ 1
2 7 2.2uH
GND
V- 2 GND HALL LX
300K +
Out 3 HALL BAT
-
IP5416
2 GND 6
1 GND 3 LN GND
10 GND
LIGHT
ING 9 DAT2 3K
4 5
5 DAT1 VIN BAT
6 VIN 0.22uF 2.2uF

VIN

GND
Micro USB

Figure11 1LED Mode Typical Application Diagram

V1.0 Email: service@injoinic.com 10 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
12.Package

V1.0 Email: service@injoinic.com 11 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
13.Mark description

V1.0 Email: service@injoinic.com 12 / 13 Copyright © 2021, Injoinic Corp.

 IP5416
IMPORTANT NOTICE
INJOINIC TECHNOLOGY and its subsidiaries reserve the right to make corrections, enhancements,
improvements and other changes to its semiconductor products and services. Buyers should obtain the latest
relevant information before placing orders and should verify that such information is current and complete. All
semiconductor products (also referred to herein as “components”) are sold subject to INJOINIC TECHNOLOGY's
terms and conditions of sale supplied at the time of order acknowledgment.
INJOINIC TECHNOLOGY assumes no liability for applications assistance or the design of Buyers' products.
Buyers are responsible for their products and applications using INJOINIC TECHNOLOGY's components. To minimize
the risks associated with Buyers' products and applications, Buyers should provide adequate design and operating
safeguards.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-
related requirements concerning its products, and any use of INJOINIC TECHNOLOGY's components in its
applications, notwithstanding any applications-related information or support that may be provided by INJOINIC
TECHNOLOGY. Buyer represents and agrees that it has all the necessary expertise to create and implement
safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen
the likelihood of failures that might cause harm and take appropriate remedial actions. Buyer will fully indemnify
INJOINIC TECHNOLOGY and its representatives against any damages arising out of the use of any INJOINIC
TECHNOLOGY's components in safety-critical applications.
Reproduction of significant portions of INJOINIC TECHNOLOGY's information in INJOINIC TECHNOLOGY's data
books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated
warranties, conditions, limitations, and notices. INJOINIC TECHNOLOGY is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
INJOINIC TECHNOLOGY will update this document from time to time. The actual parameters of the product
may vary due to different models or other items. This document voids all express and any implied warranties.
Resale of INJOINIC TECHNOLOGY's components or services with statements different from or beyond the
parameters stated by INJOINIC TECHNOLOGY for that component or service voids all express and any implied
warranties for the associated INJOINIC TECHNOLOGY's component or service and is an unfair and deceptive business
practice. INJOINIC TECHNOLOGY is not responsible or liable for any such statements.

V1.0 Email: service@injoinic.com 13 / 13 Copyright © 2021, Injoinic Corp.