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Texas Instruments bq77905 User Manual Download Page 11

DSG

11

CHGU

12

CCFG

17

CHG

13

LD

14

TS

15

VTB

16

CTRC

18

AVDD

2

VDD

1

VC5

3

VC4

4

VC3

5

VC2

6

VC1

7

AVSS

8

SRP

9

SRN

10

CTRD

19

DVSS

20

U1

BQ77905PWR

TP6

DNP

1
2
3

J4

DNP

10M

R3

DNP

10M

R2

DNP

GND

GND

GND

TP7

DNP

GND

1.0k

R1

1µF

C7

GND

GND

1.0k

R4

0.1µF

C4

GND

1.0k

R5

0.1µF

C3

GND

1.0k

R9

0.1µF

C5

GND

1.0k

R10

0.1µF

C2

GND

1.0k

R11

0.1µF

C6

GND

1µF

C1

VC1

VC2

VC3

VC4

VC5

VDD

0

R7

0

R6

GND

GND

GND

5

4

1
2
3

6

J2

J6

BATT-

0.01

R21

60V

7,8

1,2,3

5,6,

Q1

60V

7,8

1,2,3

5,6,

Q2

60V

Q3

DNP

60V

Q4

DNP

PACK-

0.1µF

C13

0.1µF

C14

10M

R17

5.1k

R14

26V

D1

DNP

GND

3.0M

R18

470k

R19

5.1k

R15

0.1µF

C12

0.1µF

C11

NT1

C5

C5
C4
C3
C2
C1

C5

E1

0 - 25 V

6 A

3 - 25 V

6 A

Input

Output

10.0k

R8

GND

TP1

DNP

TP3

DNP

TP2

DNP

TP5

DNP

TP4

DNP

PACK+

100

R12

100

R13

0.1µF

C9

0.1µF

C10

0.1µF

C8

GND

GND

4

1
2
3

J3

10.0k ohm

t°

RT1

BATSR-

CD

4

1
2
3

J1

DNP

4

1

2

3

J5

DNP

470k

R20

DNP

1.0M

R16

16V

D4

100V

D2

100V

D3

DNP

LD
CHGU
DSG

AVDD
CCFG

LDU

www.ti.com

Circuit Module Physical Layouts

11

SLVUAN2A – May 2016 – Revised July 2016

Submit Documentation Feedback

Copyright © 2016, Texas Instruments Incorporated

bq77905 3-5S Low Power Protector Evaluation Module

5.2

Schematic

Figure 12

shows the bq77905EVM schematic.

Figure 12. bq77905EVM Schematic

Summary of Contents for bq77905

Page 1: ...board jumpers to simulate over or under temperature conditions to observe FET control under different charge and discharge conditions 1 Features Complete evaluation system for the bq77905 3 5S Low Pow...

Page 2: ...ture during evaluation and provide cooling as needed for your system environment CAUTION Some power supplies can be damaged by application of external voltages If using more than one power supply chec...

Page 3: ...unt is removed L shunt J3 This shunt shorts J3 pins 3 and 4 connecting the IC TS pin to the thermistor A cold temperature is simulated when the shunt is removed 2 4 Quick Start Sequence These steps de...

Page 4: ...lled 11 Adjust the supply voltage to 12 V to simulate an undervoltage condition Observe that the pack voltage drops to approximately 0 V 12 Adjust the supply voltage to 18 V to allow recovery from the...

Page 5: ...e used to adjust the voltage across the individual input resistors to simulate different cell voltages Figure 2 Bipolar Operation Operation can also be demonstrated with conventional supplies and load...

Page 6: ...ells It is recommended that the user operate the bq77905 EVM with power supplies to become familiar with the operation and features of module and bq77905 before connecting cells The bq77905 EVM may be...

Page 7: ...als The charge and discharge FETs installed are 60 V rated and will normally accommodate connection of two EVMs Connection of more than two EVMs is not supported by the patterns on the board and is no...

Page 8: ...he PACK terminals or supply a charge voltage to recover from UV after the cell voltages have returned to normal The Quick Start Sequence section is a good procedure to check the basic operation of the...

Page 9: ...t Module Physical Layouts This section contains the printed circuit board PCB layout assembly drawings and schematic for the bq77905 circuit module 5 1 Board Layout This section shows the PCB layers a...

Page 10: ...10 SLVUAN2A May 2016 Revised July 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated bq77905 3 5S Low Power Protector Evaluation Module Figure 9 Internal Layer 1 Figure...

Page 11: ...F C13 0 1 F C14 10M R17 5 1k R14 26V D1 DNP GND 3 0M R18 470k R19 5 1k R15 0 1 F C12 0 1 F C11 NT1 C5 C5 C4 C3 C2 C1 C5 E1 0 25 V 6 A 3 25 V 6 A Input Output 10 0k R8 GND TP1 DNP TP3 DNP TP2 DNP TP5...

Page 12: ...R 0603 0603 06035C104KAT2A AVX D2 1 100 V Diode Switching 100 V 0 25 A SOD 323F SOD 323F BAS16J 135 NXP Semiconductor D4 1 16 V Diode Zener 16 V 200 mW SOD 323 SOD 323 MMSZ5246BS 7 F Diodes Inc MM3Z16...

Page 13: ...4 mm Disc 5 8 4 mm 103AT 2 SEMITEC Corporation SH J3_1 SH J3_3 2 1 2 Shunt 100 mil Gold plated Black Shunt 969102 0000 DA 3M SNT 100 BK G Samtec U1 1 3 5S Low Power Protector PW0020A PW0020A BQ77905PW...

Page 14: ...uation Module Table 3 bq77905EVM Bill of Materials 1 continued Designator Quantity Value Description Package Reference Part Number Manufacturer Alternate Part Number Alternate Manufacturer TP2 TP3 TP4...

Page 15: ...ation from Texas Instruments bq77905 3 5S Low Power Protector data sheet SLUSCM3 Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes f...

Page 16: ...ing the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repa...

Page 17: ...transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indic...

Page 18: ...ified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sens...

Page 19: ...REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE L...

Page 20: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

Page 21: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments BQ77905EVM 707...

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