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Linear Technology LTC2945, Demo Manual

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Linear Technology LTC2945 Demo Manual Download Page 9

9

dc1697afa

DEMO MANUAL DC1697A

Information  furnished  by  Linear  Technology  Corporation  is  believed  to  be  accurate  and  reliable.  

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

SCHEMATIC DIAGRAM

1

1

2

2

3

3

4

4

5

5

A

A

B

B

C

C

D

D

2.  INSTALL SHUNTS AS SHOWN.

1.  ALL RESISTORS ARE IN OHMS, 0603.      ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTES: UNLESS OTHERWISE SPEC

IFIED

QUICK EVAL DEMO ONLY

HIGH VOLTAGE LINES

VPU

INTVCC

SCL

SDA/SDAI

/ALERT

/ALERT

INTVCC

VIN

VOUT

SIZE

DATE:

.V

ER

.O

N 

CI

SHEE

T

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUST

OMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

4

DEMO CIRCUI

T 1697A

10/26/2012, 06:09 PM

1

1

WIDE RANGE I2C POWER MONITOR

N/A

LTC2945CUD

KIM T.

MARK T.

SIZE

DATE:

.V

ER

.O

N 

CI

SHEE

T

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUST

OMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

4

DEMO CIRCUI

T 1697A

10/26/2012, 06:09 PM

1

1

WIDE RANGE I2C POWER MONITOR

N/A

LTC2945CUD

KIM T.

MARK T.

SIZE

DATE:

.V

ER

.O

N 

CI

SHEE

T

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUST

OMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

4

DEMO CIRCUI

T 1697A

10/26/2012, 06:09 PM

1

1

WIDE RANGE I2C POWER MONITOR

N/A

LTC2945CUD

KIM T.

MARK T.

REVISION HISTORY

DESCRIPTIO

N

DATE

APPROVED

EC

O

REV

MARK T.

PRODUCTION

__

21-

62-

01

4

REVISION HISTORY

DESCRIPTIO

N

DATE

APPROVED

EC

O

REV

MARK T.

PRODUCTION

__

21-

62-

01

4

REVISION HISTORY

DESCRIPTIO

N

DATE

APPROVED

EC

O

REV

MARK T.

PRODUCTION

__

21-

62-

01

4

C3

0.1uF

C3

0.1uF

J1

MOLEX

87831-1420

TO DC590B

J1

MOLEX

87831-1420

TO DC590B

VUNREG

1

CS

6

GND

3

SCK/SCL

4

MISO

5

5V

2

SDA/MOSI

7

GND

8

EESDA

9

EEVCC

10

EESCL

11

EEGND

12

GND

13

NC

14

R4 (OPT)

0603

R4 (OPT)

0603

R7 5.1K

R7 5.1K

JP1

VIN

INTVCC

EXTVDD

VDD_SEL

JP1

VIN

INTVCC

EXTVDD

VDD_SEL

1

3

2

4

6

5

R5 (OPT)

0603

R5 (OPT)

0603

E14

ADIN

E14

ADIN

R6 5.1K

R6 5.1K

E4

GND

E4

GND

E12

VPU

E12

VPU

E7

SDAO

E7

SDAO

TP1

(OPT)

TP1

(OPT)

R10 3.3K

R10 3.3K

R8 5.1K

R8 5.1K

C1 0.1uF 100V 1206

C1 0.1uF 100V 1206

D2 GRN INTVCC

VL

M

C3101

D2 GRN INTVCC

VL

M

C3101

JP2

TIE

UNTIE

SDA

JP2

TIE

UNTIE

SDA

1

3

2

JP4

HI

FLOAT

LO

ADR1

JP4

HI

FLOAT

LO

ADR1

1

3

2

4

D3 RED ALERT

VL

M

S3000

D3 RED ALERT

VL

M

S3000

EXPOSED PAD

U1

LTC2945CUD

EXPOSED PAD

U1

LTC2945CUD

SENSE+

11

SENSE-

10

VDD

12

INTVCC

1

ADR0

3

ADR1

2

ALERT

9

SDAO

8

SDAI

7

ADIN

4

GND

5

SCL

6

EP

13

E6

EXTVDD

E6

EXTVDD

JP3

HI

FLOAT

LO

ADR0

JP3

HI

FLOAT

LO

ADR0

1

3

2

4

C4

0.1uF

C4

0.1uF

E11

SCL

E11

SCL

C2

1000pF

100V

C2

1000pF

100V

Q1 2N7002

Q1 2N7002

E13

GND

E13

GND

E1

VIN

0V - 80V

E1

VIN

0V - 80V

E2

GND

E2

GND

E9

SDAI

E9

SDAI

R1

0.020 1% 2010

R1

0.020 1% 2010

E8

INTVCC

E8

INTVCC

E10

GND

E10

GND

R3

10K

R3

10K

U2

24LC025-I/ST

U2

24LC025-I/ST

A0

1

A1

2

A2

3

VSS

4

VCC

8

WP

7

SCL

6

SDA

5

E5

ALERT

E5

ALERT

D1 SMAJ75A-13-F

D1 SMAJ75A-13-F

R9 3.3K

R9 3.3K

E3

VOUT

5A

E3

VOUT

5A

R2 51

R2 51

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Summary of Contents for LTC2945

Page 1: ...A 24 bit power value is generated by digitally multiplying the measured 12 bit load current and input voltage data Minimum and L LT LTC LTM QuikEval Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation All other trademarks are the property of their respective owners BOARD PHOTO maximum values are stored and an overrange alert with programmablethresholdsm...

Page 2: ...C Internal Low Voltage Supply Input Output This turret is used to power internal circuitry and can be con figuredasadirectinput asalinearregulatorfromahigher voltage connected to VDD or as a shunt regulator Please see LTC2945 data sheet for more details ADIN ADC input measured by the onboard ADC Can measure between 0V and 2 048V VPU PullupvoltagefortheALERTLED Connectedonthis board to a 5V isolate...

Page 3: ...int as long as 4V to 80V is provided at VIN the part will function correctly However should VDD_SEL be tied to EXTVDD then a separate voltage source should be provided at the EXTVDD turret Should VDD_SEL be tied to INTVCC then if VIN is less than 7V a 5V supply should be provided at the INTVCC turret If the system is connected properly the INTVCC green LED should be lit and the ALERT red LED shoul...

Page 4: ... range of resistance for a given input range is given by the following formula VS MAX 5 9V 35mA RSHNT VS MIN 6 7V 1mA ILOAD MAX The DC590 provides isolation and level shifting as the I2C interface is operating at 5 9V to 6 7V below the supply being monitored 80V 5k dc1697A F03 Figure 3 Powering DC1697A Using High Side Shunt Regulator to Allow for Input Voltage Higher Than 80V Jumper VDD_SEL Set to...

Page 5: ... Side Shunt Regulator in High Side Current Sense Topology Jumper VDD_SEL Set to INTVCC with a Resistor Connected to INTVCC 0V TO 80V 80V 5k LOAD dc1697A F04 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 6: ...nd GND and the 48V return tied to EXTVDD The DC590 provides isolation and level shifting as the I2C interface is operating at 48V with respect to 48V RTN which is normally at earth ground potential 48V RETURN 48V INPUT 48V RETURN LOAD dc1697A F05 TO DC590 PROVIDES ISOLATION Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Page 7: ...ing FAULT button will light up red on the software GUI The ALERT LED should also be red on the DC1697A itself Click the Clear Alerts button to clear all alerts With Alert Persist not enabled an alert event will still light up the corresponding FAULT button however the ALERT LED on the board will turn on briefly before turning off due to a read by the GUI from the Fault Register The QuikEval GUI co...

Page 8: ...041PAEN RC 12 1 J1 Header 2 mm CTRS MOLEX 878 31 1420 13 1 Q1 N Channel MOSFET SOT23 DIODES ZETEX 2N7002 7 F 14 1 R1 Res LRC 0 020 1 0W 1 2010 IRC LRF20 10LF 01 R020 F 15 1 R2 Res Chip 51 0 1W 5 0603 VISHAY CRCW060351R0JNEA 16 1 R3 Res Chip 10k 0 1W 5 0603 VISHAY CRCW060310K0JNEA PANASONIC ERJ3GEYJ103V 17 0 R4 R5 OPT Res 0603 OPT 18 3 R6 R7 R8 Res Chip 5 1k 0 1W 5 0603 VISHAY CRCW06035K10JNEA 19 2...

Page 9: ...Y Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD L...

Page 10: ...TY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions wit...

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