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UG:118 

vicorpower.com  

Applications Engineering: 800 927.9474 

Page 2

Set Up

The Customer Evaluation Board should be set up as follows:

Note: 

Care should be taken to avoid reversing polarities if connecting to the opposite

(solder) side of the board.

+IN, –IN

Connect a high-quality, low noise power supply to the +IN and-IN terminals of the 
Customer Evaluation Board. The startup slew rate of the input source should be no 
greater than 1 V/µs. The interconnect leads should be heavy gauge and as short as 
possible. Additional capacitance may have to be added on the evaluation board to 
make up for impedances in the interconnect leads as well as deficiencies in the source. 

+OUT, –OUT

The load should be connected to +OUT and –OUT terminals of the evaluation board 
with short leads of suitable gauge to carry the output current and minimize losses. The 
evaluation board can be connected directly to the application for which the module is 
intended. However the interconnect impedances between the evaluation board and the 
application can greatly affect the transient response. For applications where transient 
response is critical, the user should consider mounting the HDC module directly to 
the target application PCB. Test points TP14 (+OUT) and TP06 (-OUT) can be used to 
monitor the output.

Primary Control (PC)

The PC can be used to disable the HDC or provide a primary referenced bias supply. The 
module can be disabled by connecting PC (TP03) to –HDC_IN (TP05).

Trim (TR)

The S01 switch on the Customer Evaluation Board can be used to enable or disable 
output voltage trimming on the HDC. Potentiometer R12 can be adjusted to trim the 
output voltage of the converter.

Figure 1.

HDC Customer Evaluation Board 

layout drawing, component side

Summary of Contents for HD Series

Page 1: ...ets are available for downloading at vicorpower com Please refer to Figure 1 for locations of the input and output connections as viewed from the component side Wires may be soldered directly to the pads instead of ring lugs if desired to minimize circuit impedances NOTE The Customer Evaluation Board has footprints for both A and B Series HDC modules but only one module can be populated on the eva...

Page 2: ... short leads of suitable gauge to carry the output current and minimize losses The evaluation board can be connected directly to the application for which the module is intended However the interconnect impedances between the evaluation board and the application can greatly affect the transient response For applications where transient response is critical the user should consider mounting the HDC...

Page 3: ...efficiency measurement Be certain to accurately measure the voltage directly at the HDC using the appropriate pair of contact points located at the corners of the HDC Recommended Hardware Qty Description Manufacturer P N 5 10 32 lock washer Kit 41062 5 10 32 screw 5 10 32 hex nut Kit 41062 is included with the Customer Evaluation Board Thermals For most lab environments a fan blowing across the ev...

Page 4: ...X7T 0 68 µF 10 450 V 2220 TDK 445 7776 1 ND TDK C5750X7T2W684K 200KA C02 C03 C04 C05 CAP X7R 2200 pF 10 250 V 2220 Murata 490 3480 1 ND Murata GA355QR7GF222K W01L C06 C07 N A N A N A N A N A C11 C21 CAP X7R 22 µF 10 50 V 1206 AVX 478 1560 1 ND AVX 12065C224KAT2A C22 C23 C24 C25 C31 CAP ALEL 1000 µF 20 25V SMD 13 5 X 13 5 Panasonic PCE3462CT ND No Stock No Stock C33 CAP X7R 2200 pF 10 250 V 2220 Mu...

Page 5: ...S02 R01 RES 374K OHM 1 8 W 1 0805 Panasonic P374KCCT ND Panasonic ERJ 6ENF3743V R02 R03 RES ZERO OHM JUMPER 2 A 1206 Vishay 541 0 0ECT ND Vishay CRCW 12060000Z0EC R04 N A N A N A N A N A R05 RES 23 7 OHM 1 8 W 1 0805 Panasonic P23 7CCT ND Panasonic ERJ 6ENF23R7V R08 RES 0 OHM JUMPER 1 A 0603 Panasonic P0 0GCT ND Panasonic ERJ 3GEY0R00V R10 N A N A N A N A N A R11 RES 20 OHM 1 4 W 1 1206 Panasonic ...

Page 6: ...The Power Behind Performance Rev 1 0 07 14 vicorpower com Applications Engineering 800 927 9474 Page 6 Figure 2 HDC Customer Evaluation Board Schematic ...

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