unitrode EV2903 Manual Download Page 8

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EV2903

0.1UF

C18

0.1UF

R21

200K

20K

R18

20K

R16

20K

R19

R20

487K

R10

200K

R15

20K

R17

VCC

LM358N

1N751A

D12

JP3

JP4

JP5

JP6

0.1UF

SHEET_1

1N4148

1
2
3
4
5

6
7
8
9

CHG

DISP

DONE

EMPTY

REF

VSS

SEG5

SEG4

SEG3

SEG2

SEG1

VCC

LCOM

BQ2014

1
2
3
4
5
6
7
8

DRV

BAT+

ISNS

DONE

PG1

PG2

PG3

PG4

DATA COLLECTION

EV2903/4-24-97/F2

Appendix B: EV2903 Schematic Continued

Summary of Contents for EV2903

Page 1: ...of the fast charge rate For safety charging is inhibited if the voltage of any cell is greater than 3 0V during charge or if the voltage of any cell is less than 0 4V when not charging open circuit vo...

Page 2: ...a bus connection This con nection is made to the RS 232 cable con necting to the serial port of the PC EV2903 Configuration The EV2903 Evaluation Board operates with or without the Interface Program C...

Page 3: ...started and communication has been established with the EV2903 board If this screen does not appear please refer to Appendix A Troubleshooting for possible solu tions Display and Functional Buttons Th...

Page 4: ...y the EV2903 While charging the battery stack voltage may appear to jump around This action is due to the voltage being sampled at various times either during the charging pulse or during the idle per...

Page 5: ...es EDV Please refer to the bq2903 data sheet Battery Stack Voltage EDV When the bq2903 senses EDV it disconnects the battery stack from the load At this time the bq2014 Gas Gauge cannot sense the batt...

Page 6: ...fter starting the program then communication to the EV2903 Evaluation board has not been established Please check the following Time Out Error On occasion we have noticed that a communication time out...

Page 7: ...3 U1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J1 1 2 3 4 5 6 CHARGE RED D1 DONE GREEN D2 VOLT RENEWAL1 VOLT RENEWAL3 1 VOLT RENEWAL2 VOLT RENEWAL4 IRLZ34 Q1 CELL_SEL S1 1 2 3 4 5 6 JP7 JP8 JP9 1N4001 D9 1N400...

Page 8: ...12 JP3 1 3 2 JP4 1 3 2 JP5 1 3 2 JP6 1 3 2 0 1UF C3 SHEET_1 SHEET_1 SHEET_1 SHEET_1 1N4148 D8 1N4148 D7 1N4148 D3 1N4148 D6 1N4148 D5 P1 1 2 3 4 5 6 7 8 9 CHG DISP DONE SR SB EMPTY DQ REF VSS SEG5 SEG...

Page 9: ...ONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH PERSONAL INJURY OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE CRITICAL APPLICATIONS TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED AUTHORIZED OR WARRANT...

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