Linear Technology LTC2945 Demo Manual Download | Manualshive

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dc1697afa

DEMO MANUAL DC1697A

HARDWARE SETUP

Figure 4. Powering DC1697A Through Low-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

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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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