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Thank you for your accessing to ROHM product informations.  
More detail product informations and catalogs are available, please contact us. 

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The information contained herein is subject to change without notice. 

Before you use our Products, please contact our sales representative

 

and verify the latest specifica-

tions :

Although ROHM is continuously working to improve product reliability and quality, semicon-
ductors can break down and malfunction due to various factors.
Therefore, in order to prevent personal injury or fire arising from failure, please take safety 
measures such as complying with the derating characteristics, implementing redundant and 
fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no 
responsibility for any damages arising out of the use of our Poducts beyond the rating specified by 
ROHM.

Examples of application circuits, circuit constants and any other information contained herein are 
provided only to illustrate the standard usage and operations of the Products. The peripheral 
conditions must be taken into account when designing circuits for mass production.

The technical information specified herein is intended only to show the typical functions of and 
examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, 
any license to use or exercise intellectual property or other rights held by ROHM or any other 
parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of 
such technical information.

The Products specified in this document are not designed to be radiation tolerant.

For use of our Products in applications requiring a high degree of reliability (as exemplified  
below), please contact and consult with a ROHM representative : transportation equipment (i.e. 
cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety 
equipment, medical systems, servers, solar cells, and power transmission systems.

Do not use our Products in applications requiring extremely high reliability, such as aerospace 
equipment, nuclear power control systems, and submarine repeaters.

ROHM shall have no responsibility for any damages or injury arising  from non-compliance with 
the recommended usage conditions and specifications contained herein.

ROHM has used reasonable care to ensur

H

 the accuracy of the information contained  in this 

document. However, ROHM does not warrants that such information is error-free, and ROHM 
shall have no responsibility for any damages arising from any inaccuracy or misprint of such 
information.

Please use the Products in accordance with any applicable environmental laws and regulations, 
such as the RoHS Directive. For more details, including RoHS compatibility, please contact a 
ROHM sales office. ROHM shall have  no responsibility for any damages or losses resulting 
non-compliance with any applicable laws or regulations.

When providing our Products and technologies contained in this document to other countries, 
you must abide by the procedures and provisions stipulated in all applicable export laws and 
regulations, including without limitation the US Export Administration Regulations and the Foreign 
Exchange and Foreign Trade Act.

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

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Содержание BD71631QWZ-EVK-001

Страница 1: ...tion of VIN VOUT 1 V and up to 100 mA under the condition of VIN VOUT 0 3 V If 2 9 V VIN 5 5 V it can be used up to 30 mA under the condition of VIN VOUT 0 3 V The charging current can be set with an...

Страница 2: ...the VIN pin of the EVK 3 Connect the positive terminal of the DC power supply that can sink to the VOUT pin of the EVK 4 Connect a current meter between the VOUT terminal of the EVK and the positive...

Страница 3: ...ows The Pre charge current IPRE flows until the battery voltage reaches the Pre charge voltage VPRE IPRE is ICHG 2 that is charged at Constant Current CC and the charging current IPRE flows When the b...

Страница 4: ...BATTERY ERROR VBAT OVP detect or 10 hours safety timer expired DONE CHARGE VBAT Re charge voltage Continue to satisfy the condition for 25 ms CHARGE TEMP_ERROR_1 or TOP_OFF TEMP_ERROR_2 Temp Error det...

Страница 5: ...6 The re charge voltage is determined as follows 1 2 2 0 6 About total feedback resistance the following is a reference example of operation settings Table 4 Resister reference value Charge Condition...

Страница 6: ...ula using the external resistor RICHG1 500000 RICHG1 mA The charging current can be set up to 300 mA VIN 4 V VIN VOUT 1 V 100 mA VIN 4 V VIN VOUT 0 3 V and 30 mA 2 9 V VIN 5 5 V VIN VOUT 0 3V There is...

Страница 7: ...CT constant is as follows When calculating RNTC and RNTCR1 firstly calculate the resistance voltage dividers VHot and VCold when charging stops with the NTC thermistor temperature profile in Figure 7...

Страница 8: ...ue of the voltage divided by the resistance at hot temperature VNTC_Cold Detection voltage of NTC terminal at low temperature 3 605 V at Ta 2 C VNTC_Hot Detection voltage of NTC terminal at high tempe...

Страница 9: ...5102 ROHM 1608 0603 1 RVFB1 Resistor 180k 1 10W 50V 0 5 MCR03EZPD1803 ROHM 1608 0603 1 RVFBRE1 Resistor 120k 1 10W 50V 0 5 MCR03EZPD1203 ROHM 1608 0603 2 RVFB2 RVFBRE2 Resistor 30k 1 10W 50V 0 5 MCR03...

Страница 10: ...mber of Layers Material Board Size Copper Thickness 4 FR 4 46mm x 36mm x 1 6mm 1oz 35 m The layout of BD71631QWZ EVK 001 is shown below Figure 9 Top Silkscreen Layout Top View Figure 10 Top Layer Layo...

Страница 11: ...11 13 2021 ROHM Co Ltd No 64UG016E Rev 001 MAY 2021 User s Guide BD71631QWZ EVK 001 Figure 13 Bottom Layer Layout Top View Downloaded From Oneyac com...

Страница 12: ...e BD71631QWZ EVK 001 Reference Application Data Figure 14 Charge Current vs VOUT Voltage Figure 15 Charge Voltage vs Input Voltage Figure 16 VOUT Leak Current vs VOUT Voltage VIN Open VIN 5 V ICHG 100...

Страница 13: ...13 13 2021 ROHM Co Ltd No 64UG016E Rev 001 MAY 2021 User s Guide BD71631QWZ EVK 001 Revision History Date Revision Number Description 24 May 2021 001 Initial release Downloaded From Oneyac com...

Страница 14: ...ation The Products specified in this document are not designed to be radiation tolerant For use of our Products in applications requiring a high degree of reliability as exemplified below please conta...

Страница 15: ...ROHM Semiconductor Downloaded From Oneyac com...

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