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ADP1974-EVALZ User Guide 

UG-883 

 

Rev. 0 | Page 9 of 12 

EVALUATION BOARD SCHEMATIC AND LAYOUT 

SCHEMATIC 

3

4

5

7

8

15

13

14

16

12

11

10

9

R

DL

C

DL

C

VREG

C

SYNC

R

SYNC

R

DH

C

DH

1

2

DH

DL

DH

CL

DT

VREG

VREG

VIN

EN

MODE

SYNC

FAULT

SCFG

FREQ

DMAX

SS

COMP

GND

DL

DLR

DHR

VIN

EN

MODE

ADP1974

SYNC

FAULT

COMP

CL

C

VIN1

C

DMAX

R

DMAX

R

DT

R

S

R

CL

R

FREQ

C

DT

C

SCFG

R

SCFG

C

SS

C

VIN2

6

13517-

017

 

Figure 17. 

ADP1974

 Evaluation Board Schematic 

 

Summary of Contents for ADP1974-EVALZ

Page 1: ...ne Frequently asked questions FAQs and troubleshooting GENERAL DESCRIPTION The ADP1974 EVALZ is an open loop evaluation board that can be used to test the features of the ADP1974 The ADP1974 is a cons...

Page 2: ...Loop Evaluation 3 Evaluation Board Setup Procedures 4 Quick Start Steps 4 Adjusting the ADP1974 EVALZ Components for a Specific Application 5 Application Specific ADP1974 Control 7 Evaluation Board H...

Page 3: ...EXTERNAL EQUIPMENT AND SYSTEM GROUND POWER SUPPLY VIN 6V TO 60V POWER SUPPLY VFAULT 6V TO 60V POWER SUPPLY VCOMP 0V TO 5V GROUND CONNECTION FOR EXTERNAL EQUIPMENT AND SYSTEM GROUND 13517 001 CONNECT A...

Page 4: ...test bus This jumper connects EN to VIN and enables the ADP1974 see Figure 2 PLACE JUMPER HERE 13517 002 Figure 2 Enabled Jumper Position Use a jumper to connect the bottom two pins of the EN test bus...

Page 5: ...wave is visible on the DL pin A complementary square wave is visible on the DH pin 0 5V 4 5V 2 5V BOOST MODE CONFIGURATION MODE 1 05V TYPICAL VSCFG 4 53V TYPICAL COMP 0V DH DL 0V INTERNAL RAMP 4V p p...

Page 6: ...to a frequency slightly lower than that of the master device to allow the digital synchronization loop of the ADP1974 to synchronize to the master clock period The slave device can synchronize to a ma...

Page 7: ...20 A typical RCL 20 k The ADP1974 is designed so that the peak current limit is the same in both the buck mode and boost mode of operation A tolerance of 1 or better for the RCL and RS resistors is re...

Page 8: ...onfigured as an input 1 VIN can also be used to supply VEN and VMODE via jumper connections Alternatively EN and MODE can be powered with separate power supplies 2 When used with the AD8450 the FAULT...

Page 9: ...8 15 13 14 16 12 11 10 9 RDL CDL CVREG CSYNC RSYNC RDH CDH 1 2 DH DL DH CL DT VREG VREG VIN EN MODE SYNC FAULT SCFG FREQ DMAX SS COMP GND DL DLR DHR VIN EN MODE ADP1974 SYNC FAULT COMP CL CVIN1 CDMAX...

Page 10: ...UT 13514 016 13517 018 Figure 18 ADP1974 Evaluation Board PCB Top Layer 13517 019 Figure 19 ADP1974 Evaluation Board PCB Inner Layer 2 13517 020 Figure 20 ADP1974 Evaluation Board PCB Inner Layer 1 13...

Page 11: ...resistor 20 k 0805 1 Vishay Dale CRCW080520K0FKEA 1 RS Current limit set resistor Open 1 RSCFG Synchronization pin control resistor Open 3 CSCFG CDMAX CDT SCFG DMAX and DT pin bypass capacitors 47 pF...

Page 12: ...party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Custome...

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