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© 2021 ROHM Co., Ltd.

 

 

No. 64UG016E Rev.001

 
 

MAY.2021

 
 

User’s Guide 

BD71631QWZ-EVK-001 

Parts list

 

Table 5. Parts list 

Count 

Parts No. 

Type 

Value 

Description 

Manufacturer 

Part Number 

Manufacturer 

Size 

[Unit: mm(inch)] 

IC 

U1 

Charger 

Linear Charger 

BD71631QWZ-E2 

ROHM 

1.8 x 2.4 

(0.071x0.094) 

Capacitor 

CVIN1 

MLCC 

4.7µF 

16V, X5R, ±10% 

GRM188R61C475KAAJD 

MURATA 

1608(0603) 

CVOUT1 

MLCC 

1µF 

25V, X5R, ±10% 

GRM155R61E105KA12D 

MURATA 

1005(0402) 

CNTC 

MLCC 

0.01µF 

16V, B, ±10 % 

GRM155B11C103KA01 

MURATA 

1005(0402) 

CVIN2, 

CVOUT2 

MLCC 

OPEN 

Resistor 

RLED, 

RNTC1, 

RNTC2 

Resistor 

10

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD1002 

ROHM 

1608(0603) 

RICHG1 

Resistor 

5.1

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD5101 

ROHM 

1608(0603) 

RITERM 

Resistor 

51

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD5102 

ROHM 

1608(0603) 

RVFB1 

Resistor 

180

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD1803 

ROHM 

1608(0603) 

RVFBRE1 

Resistor 

120

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD1203 

ROHM 

1608(0603) 

RVFB2, 

RVFBRE2 

Resistor 

30

kΩ 

1/10W, 50V, 

±0.5% 

MCR03EZPD3002 

ROHM 

1608(0603) 

RNTC3 

SHORT 

LED 

LED 

LED 

White, Clear 

SML312WBCW1 

ROHM 

1608(0603) 

Connector 

J1 

OPEN 

CN1 

Connector

 

4terminals

 

3.81mm pitch 

MKDS 1/ 4-3,81 

Phoenix 

contact 

15.23x 7.3 

(0.6x0.29)

 

Optional parts (Boost converter) 

U2 

OPEN 

L3 

OPEN 

CDCDCIN1, 

CDCDCIN2 

OPEN 

CDCDCOUT1, 

CDCDCOUT2 

OPEN 

REN, 

RVSEL_H, 

RVSEL_L 

OPEN 

 

 

The product and manufacturer names listed in the parts list are current at the time this user’s guide was prepared, and some parts 
may not be available. Please select the equivalent product based on the characteristics listed in the table. Select a ceramic 
capacitor with the same actual capacitance in consideration of the DC bias characteristics. 

 
 
 
 
 

 

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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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