Rohm BD71631QWZ-EVK-001 User Manual Download Page 13 | Manualshive

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© 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

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Summary of Contents for BD71631QWZ-EVK-001

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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