Wireless Charger Module13.56 MHz Wireless Charger ModuleBP3622
General Description

Package

BP3622 is a compact wireless charger module withintegrated antenna board.
Features- Wireless power receiver- Optimized for wireless charging with BP3621

W (Typ.) × D (Typ.) × H (Typ.)- 212 kbps wireless communication

24.0 mm × 17.0 mm × 1.5 mm

Major Performance
Parameter

Description

Power supply

Max 200 mW (d = 10.0 mm)

Antenna size

16.0 mm × 16.0 mm

Board

FR-4, t = 0.4 mm
Parts are mounted on one side

Host interface

0.5 mm pitch / 8 pin FPC connector

Weight0.38 gBlock Diagram
BP3622

Matching
CircuitWireless
Antenna coil

Flexible

Charger

Cable

LSI

Connector

Diode
Bridge

ISO_V
RFDET
P12
SDA_S
SCL_S
BAT
INT_S
GND

Figure 1. Block Diagram© 2019 ROHM Co.,Ltd.

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BP3622
1.

Absolute Maximum Ratings

No.

Parameter

SymbolRating

Unit

Condition

1

Input Voltage

VDD-0.3 to +6.5

V

Ta=25 ºC

2

Input Voltage (Digital IO *1)

VDIN-0.3 to VDD + 0.3

V

Ta=25 ºC

3

Input Current (Digital IO *1)

Ii-10 to +10mA

Ta=25 ºC

4

Output Voltage (Digital IO *1)

VDO-0.3 to VDD + 0.3

V

Ta=25 ºC

5

Operating temperature range

Topr-10 to +50ºC

Humidity:
35 % to 85 %RH
No dew condensation
Humidity:
6

Storage temperature range

Tstg-20 to +50ºC

35 % to 85 %RH
No dew condensation(*1) Digital IO: P12, RFDET, INT_S, SCL_S, SDA_S(Note) The absolute maximum ratings represent values that shall not be exceeded for even an instant on all operatingor testing conditions. Design systems with a margin for the ratings listed above.
(Note) This module can be operated only in combination with BP3621. Operation with other systems is notguaranteed.

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BP3622
2.

Recommended Operating Conditions

No.

Parameter

SymbolTopr

Specification

Unit

Min.

Typ.

Max.

-10

25

50

ºC

Condition

1

Operating temperature range

2

Distance between Antennas

Dant

-

10.0

-

mm

*1

3

Load resistance

Rload

100

-

200

Ω

*2

(*1) The power feeding antenna and the power receiving antenna should face each other horizontally.
See Figure 5 and Figure 6 for reference.
(*2) See Figure 2 and Figure 3 for reference.

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BP3622
3.

Electrical Characteristics

DC Function(Ta=25 ºC)
No.

1

2

Parameter

Output Voltage(INT_S, SDA_S, RFDET)

Input Voltage(SCL_S, SDA_S, P12)

SymbolVOH

SpecificationMin.
VDD 0.5

VOL
VIH1
VIL1

0.7
×VDD
0

Unit

Typ.

Max.

-

-

V

-

0.4

V

-

VDD

V

-

0.3 ×

Condition

V

VDD(*1) P12 settled “Pull Up Input, Detect High signal”.
“Pull Up” is done in this module.
“Pull Up” voltage depends on the power supplied from BP3621. (1.8 V to 5.5 V)“Pull Up” resistance value is typ. 100 kΩ.

Power Supply Characteristics(Ta=25 ºC)
No.

Parameter

SymbolSpecification
Min.

Typ.

Max.

Unit

1

Output Power *1

WBAT

-

200

-

mW

2

Output Voltage *1*2

VBAT

4.5

-

5.5

V

Condition(*1) During power supply from BP3621.
(*2) Set the load resistance value so that the output voltage does not fall below 4.5 V.
(Note) The characteristics of this module are ensured when using a BP3621 with a matching capacitor (optimized
matching constant) as the power feeding system.

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BP3622
4.

Typical Performance Curves

Lower limit under each condition

Upper limit

240

Output Power [mW]

220
200
180

160
140

BP3621 VDD=5.5V
BP3621 VDD=5.0V

120

BP3621 VDD=4.5V

100
80

100

120

140

160

180

200

220

Load resistance [Ω]Figure 2. Output Power vs Load resistance

Lower limit under each condition

Upper limit

5.2

Output Voltage [V]

5.1
5.0
4.9
4.8
4.7

BP3621 VDD=5.5V
BP3621 VDD=5.0V

4.6

BP3621 VDD=4.5V

4.5
80

100

120

140

160

180

200

220

Load resistance [Ω]Figure 3. Output Voltage vs Load resistancewww.rohm.com© 2021 ROHM Co., Ltd. All rights reserved.
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Datasheet

BP362245
40

Surface temperature of IC [ºC]

35
30
25
20
15
10

BP3621 VDD=5.5V
BP3621 VDD=5.0V

5BP3621 VDD=4.5V
0
0

50

100

150

200

Elapsed time [s]Figure 4. Surface temperature of IC vs Elapsed timewww.rohm.com© 2021 ROHM Co., Ltd. All rights reserved.
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BP3622

Antenna center
BP3621
BP3622Available feeding range = 7mm @Load resistance = 120 Ω
Available feeding range = 10mm @Load resistance = 200 Ω

Figure 5. Available feeding range (Top view)

4mm© 2019 ROHM Co.,Ltd.

P. 0

BP3622

Antenna center
Available feeding area @Load resistance = 200 Ω
BP36214mm

10mm

Figure 6. Available feeding area (Side view)© 2019 ROHM Co.,Ltd.

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BP36225.

I2C AC Function(Standard mode: 100 kHz, Ta=25 ºC)

No.
1
2

Parameter
SCL_S clock frequency
SCL_S hold time(start/repeated start condition)

SymbolSpecification

Unit

Min.

Typ.

Max.

fSCL

-

-

100

kHz

tHD:STA

4.0

-

-

µs

3

SCL_S “L” level time

tLOW

4.7

-

-

µs

4

SCL_S “H” level time

tHIGH

4.0

-

-

µs

tSU:STA

4.7

-

-

µs

5

SCL_S setup time(repeated start condition)

6

SDA_S hold time

tHD:DAT

0

-

-

µs

7

SDA_S setup time

tSU:DAT

0.25

-

-

µs

tSU:STO

4.0

-

-

µs

tBUF

4.7

-

-

µs

8
9

SDA_S setup time
(P: Stop condition)
Bus free time

Condition(Fast mode: 400 kHz, Ta=25 ºC)
No.
1
2Parameter
SCL_S clock frequency
SCL_S hold time(start/repeated start condition)

SymbolSpecification

Unit

Min.

Typ.

Max.

fSCL

-

-

400

kHz

tHD:STA

0.6

-

-

µs

3

SCL_S “L” level time

tLOW

1.3

-

-

µs

4

SCL_S “H” level time

tHIGH

0.6

-

-

µs

tSU:STA

0.6

-

-

µs

5

SCL_S setup time(repeated start condition)

6

SDA_S hold time

tHD:DAT

0

-

-

µs

7

SDA_S setup time

tSU:DAT

0.1

-

-

µs

tSU:STO

0.6

-

-

µs

tBUF

1.3

-

-

µs

8
9

SDA_S setup time
(P: Stop condition)
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Datasheet

BP3622
6.

Operation Flow

When BP3621 detects BP3622, it starts pre-charge operation and charge operation.

Check if a TAG is BP3622

BP3621

BP3622

Figure 7. Operation Flow

BP3621/BP3622 has three functions for controlling the power supply.
1．Communication function (Communication) BP3621 checks the response from BP3622 to determine
whether the power is supplied. Then, BP3621 receives the state of BP3622 and checks the power
supply change request and full charge status.
2．Power Supply Function (Power Transfer) BP3621 transfers power to BP3622.
3．Notification function (Notify) BP3622 requests to communicate with BP3621 to notify a power
supply change request or abnormal condition detection during power supply.
P. 0© 2019 ROHM Co.,Ltd.

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BP3622
7.

Physical Dimension

The antenna pattern is drawn on the back of the component mounting side.

Direction to face BP3621

Antenna Center

Flexible Cable Connector

Unit: mmFigure 8. Physical Dimension(Note) Dimensions without tolerances are for reference only.
(Note) When the product is shipped, the actuator of the connector is open. The height dimension is when the actuatoris closed.

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Datasheet

BP36228.

Precautions for Installation

1. This module has an antenna on the side opposite to the component mounting side.
2. Use the power feeding side antenna facing the antenna side of this module.
3. Align the center of the antenna of this module with the center of the power feeding antenna.
4. Attach double-sided tape to the antenna side and attach it to any position.
(Double-sided tape is not included with this product.)
5. Do not block the magnetic flux between the antennas.
6. This module is equipped with Hirose FH34SRJ-8S-0.5SH(50) as a flexible cable connector.
(Flexible cable is not included with this product.)www.rohm.com© 2021 ROHM Co., Ltd. All rights reserved.
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Datasheet

BP36229.

Pin Descriptions

1
8
Flexible cable
insertion direction
Figure 9. Pin Number (flexible cable connector)

Pin No.
1

Pin Name
ISO_V

I/O
-

Function
Logic IO voltage

Connections for unused pins
Open

RF signal detection output
2

RFDET

O

- Hi-Z: No Active- Low: Active after Power on and finish theOpeninitial setting
Charger IC status input

3

P12 *1

I

4

SDA_S

I/O

I2C serial data access

Open

5

SCL_S

I

I2C clock

Open

6

BAT

O

Power output-- Pull Up Input, Detect High signal

GNDInterrupt information output
7

INT_S

O

- High: No ActiveOpen- Low: Active when an interrupt occurs
8

GND

-

Ground-(*1) When “Low” voltage is input to the P12 pin, power is output from the BAT pin.

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BP3622
10. PCB Marking Specification

Unit: mmFigure 10. PCB Marking Specification

Marking
137*▲▲▲▼: Production Lot Number (8 digits)↓(Example) 137 → Year 2021, Week 37, *▲▲▲▼ (internal serial number)www.rohm.com© 2021 ROHM Co., Ltd. All rights reserved.
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BP3622
11. Reference Circuit

Figure 11. Reference Circuit Diagram

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BP3622
12. Packing Specification
12.1 Packing Method

25 pieces of products are packaged in the packaging tray, and it is piled up 12 steps to make 300 pieces with an empty
tray on the top, and it is packed into the packaging case.
The number of piling might change according to the quantity of delivery without previous notice.

Packaging tray

Fixed by adhesive cellophane tape.

Packaging trays are rotated 180 degrees
and stacked alternately.

BP3622: 25 pieces

Fixed by adhesive cellophane tape.

Packaging case
Figure 12. Packing Method

P. 0© 2019 ROHM Co.,Ltd.

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BP3622

12.2 Label Indication
The label with following things is stuck at the packing case.
1

Type name (BP3622)

2

Quantity3

Lot No.

4

Shipment inspection stamp

5

Country of origin

6

Manufacturing company name (Trade mark)7

Logotype of lead free

Please refer to the following example of the label indication.

(a) For products of ROHM APOLLO(b) For products of ROHM INTEGRATED SYSTEMS (THAILAND)
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Datasheet

BP3622
13. Product Weight
0.38 g (Typ.)

14. Manufacturing Country
JAPAN
THAILAND

15. Notice● Precaution on using this Product1) This Product may be subjected to radio wave interference from other equipment emitting radio waves.
2) This Product emits radio waves due to the specification. To use equipment emitting radio waves, certification
under the Radio Act should be obtained by region in which the Product is used. For the standards for certification
under the Radio Act to be obtained for the use of this Product, separately contact your ROHM representative.

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BP3622
16. Revision History
Rev.

Date

Contents

001

15.Sep.2021

New Issue

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Notice
Precaution on using ROHM Products
1.

Our Products are designed and manufactured for application in ordinary electronic equipment (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ

2.

ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, whicha failure or malfunction of our Products may cause. The following are examples of safety measures:[a] Installation of protection circuits or other protective devices to improve system safety[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure

3.

Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items[f] Sealing or coating our Products with resin or other coating materials[g] Use of our Products without cleaning residue of flux (Exclude cases where no-clean type fluxes is used.
However, recommend sufficiently about the residue.) ; or Washing our Products by using water or water-soluble
cleaning agents for cleaning residue after soldering[h] Use of the Products in places subject to dew condensation

4.

The Products are not subject to radiation-proof design.

5.

Please verify and confirm characteristics of the final or mounted products in using the Products.

6.

In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse, is applied,confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affectproduct performance and reliability.

7.

De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in
the range that does not exceed the maximum junction temperature.

8.

Confirm that operation temperature is within the specified range described in the product specification.

9.

ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined inthis document.

Precaution for Mounting / Circuit board design
1.

When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect productperformance and reliability.

2.

In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must
be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,
please consult with the ROHM representative in advance.

For details, please refer to ROHM Mounting specification

Notice-PGA-E© 2015 ROHM Co., Ltd. All rights reserved.

Rev.004

Precautions Regarding Application Examples and External Circuits
1.

If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of thecharacteristics of the Products and external components, including transient characteristics, as well as static
characteristics.

2.

You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.

Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not beapplied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).

Precaution for Storage / Transportation
1.

Product performance and soldered connections may deteriorate if the Products are stored in the places where:[a] the Products are exposed to sea winds or corrosive gases, including Cl 2, H2S, NH3, SO2, and NO2[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation[d] the Products are exposed to high Electrostatic

2.

Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time isexceeding the recommended storage time period.

3.

Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.

4.

Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products ofwhich storage time is exceeding the recommended storage time period.

Precaution for Product Label
A two-dimensional barcode printed on ROHM Products label is for ROHM’s internal use only.

Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.

Precaution for Foreign Exchange and Foreign Trade act
Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign
trade act, please consult with ROHM in case of export.

Precaution Regarding Intellectual Property Rights
1.

All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data.

2.

ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the
Products with other articles such as components, circuits, systems or external equipment (including software).

3.

No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM
will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to
manufacture or sell products containing the Products, subject to the terms and conditions herein.

Other Precaution
1.

This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.

2.

The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior writtenconsent of ROHM.

3.

In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.

4.

The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.

Notice-PGA-E© 2015 ROHM Co., Ltd. All rights reserved.

Rev.004

Datasheet
General Precaution

1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any priornotice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.

3.

The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of orconcerning such information.

Notice – WE

© 2015 ROHM Co., Ltd. All rights reserved.

Rev.001