BP3621

Wireless Charger Module 13.56 MHz Wireless Charger Module BP3621 General Description Package BP3621 is a compact wireless charger module with integrated antenna board. Features - Wireless power transmitter W (Typ.) × D (Typ.) × H (Typ.) - Optimized for wireless charging with BP3622 35.0 mm × 26.0 mm × 1.5 mm - 212 kbps wireless communication Major Performance Parameter Description Antenna size 24.0 mm × 24.0 mm Board FR-4, t = 0.4 mm Parts are mounted on one side Host interface 0.5 mm pitch / 8 pin FPC connector Weight 0.80 g Block Diagram BP3621 Matching Circuit Wireless Antenna coil Flexible Charger Cable LSI Connector Xtal 27.12 MHz VDD SHUTDOWN RESET ERROR SDA_S SCL_S INT_S GND Figure 1. Block Diagram © 2019 ROHM Co.,Ltd. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･14･001 P. 0 1/18 TSZ02201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 1. Absolute Maximum Ratings No. Parameter Symbol Rating 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 +10 mA 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 +50 ºC Humidity: 35 % to 85 %RH No dew condensation Humidity: 6 Storage temperature range Tstg -20 to +50 ºC 35 % to 85 %RH No dew condensation (*1) Digital IO: RESET, INT_S, SCL_S, SDA_S, ERROR, SHUTDOWN (Note) The absolute maximum ratings represent values that shall not be exceeded for even an instant on all operating or testing conditions. Design systems with a margin for the ratings listed above. (Note) This module can be operated only in combination with BP3622. Operation with other systems is not guaranteed. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 2/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 2. Recommended Operating Conditions No. Parameter Symbol Specification Min. Typ. Max. Unit 1 Operating voltage VDD 4.5 5.0 5.5 V 2 Operating temperature range Topr -10 +25 +50 ºC 3 Distance between Antennas Dant - 10.0 - mm Condition *1 *2 (*1) See Figure 2 and Figure 3 for the relationship between the output of BP3622 and the load resistance with respect to the operating voltage. (*2) The power feeding antenna and the power receiving antenna should face each other horizontally. See Figure 5 and Figure 6 for reference. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 3/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 3. Electrical Characteristics DC Function (Ta=25 ºC) No. Parameter Output Voltage 1 VOH (INT_S, SDA_S, ERROR, SHUTDOWN) 2 Symbol Input Voltage (SCL_S, SDA_S, RESET) Specification Min. VDD 0.5 VOL VIH1 VIL1 0.7 ×VDD 0 Unit Typ. Max. - - V - 0.4 V - VDD V - 0.3 × VDD Condition V Reset Function (Ta=25 ºC) No. 1 2 Parameter RESET_N pulse width RESET_N Noise removal pulse width Symbol Specification Unit Min. Typ. Max. PRST 200 - - µs PNRST - - 0.3 µs Condition Current Consumption (Ta=25 ºC) No. Parameter Symbol Specification Min. Typ. Max. - 160 - Unit Condition - TX mode 1 Current consumption IDD mA - Distance between antennas = 10 mm (Note) The characteristics of this module are ensured when using a BP3622 with a matching capacitor (optimized matching constant) as the power feeding system. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 4/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 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 resistance www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 5/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 50 45 Surface temperature of IC [ºC] 40 35 30 25 20 15 VDD=5.5V 10 VDD=5.0V 5 VDD=4.5V 0 0 50 100 150 200 Elapsed time [s] Figure 4. Surface temperature of IC vs Elapsed time www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 6/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 Antenna center BP3621 BP3622 Available 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 BP3621 4mm 10mm Figure 6. Available feeding area (Side view) © 2019 ROHM Co.,Ltd. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 P. 0 7/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 5. 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) Symbol Specification 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 2 Parameter SCL_S clock frequency SCL_S hold time (start/repeated start condition) Symbol Specification 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) Bus free time www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 8/18 Condition TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 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. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 9/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 7. Physical Dimension The antenna pattern is drawn on the back of the component mounting side. Direction to face BP3622 Antenna Center Flexible Cable Connector Figure 8. Physical Dimension Unit: mm (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 actuator is closed. www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 10/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 8. 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. TSZ22111･15･001 11/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 9. Pin Descriptions 1 8 Flexible cable insertion direction Figure 9. Pin Number (flexible cable connector) Pin No. 1 Pin Name VDD I/O I Function Power supply (5.0V input) Connections for unused pins - Shutdown request output 2 SHUTDOWN O - High: Active when BP3622 detects full charge Open - Low: No Active Hardware reset input 3 RESET I - High: No Active (Internal Pull-Up) Open - Low: Active Error information output - Hi-Z: No Active 4 ERROR O - Low: Active when an error (Internal Open Temperature, TX current is abnormal) is detected 5 SDA_S I/O 6 SCL_S I I2C serial data access Open I2C clock Open Interrupt information output 7 INT_S O - High: No Active Open - Low: Active when an interrupt occurs 8 GND - www.rohm.com © 2021 ROHM Co., Ltd. All rights reserved. TSZ22111･15･001 Ground - 12/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 10. PCB Marking Specification Unit: mm Figure 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. TSZ22111･15･001 13/18 TSZ2201-BP3621-1-2 15.Sep.2021 – Rev.001 Datasheet BP3621 11. Reference Circuit 5V R R R C 2.2μ VDD_5V ---> GND SHUTDOWN ERROR INT_S