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dc1814afe

DEMO MANUAL

DC1814A

Quick start proceDure

Figure 1. DC1814A Setup

Demonstration circuit 1814A is easy to set up for evaluat-

ing the performance of the LTC4274A. Refer to Figure 1

for proper test equipment setup and follow the procedure

below.
1. Connect a 55V to 57V power supply across AGND (+)

and VEE (–). Size the power supply considering the

maximum power delivered to the PD.

2. Connect an 802.3 Type 1 or Type 2, or LTPoE++ compat-

ible PD to RJ45 connector J1 with an Ethernet cable.

3. Measure the port output voltage to the PD across

VPORT+ and VPORT– test points.

4. (Optional) Connect a PHY to RJ45 connector J2 with

an Ethernet cable for data tests.

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Содержание 1814A

Страница 1: ...inear logo are registered trademarks of Linear Technology Corporation All other trademarks are the property of their respective owners The LTC4274A is configured in the DC1814A as an AUTO pinhigh MIDp...

Страница 2: ...below 1 Connect a 55V to 57V power supply across AGND and VEE Size the power supply considering the maximum power delivered to the PD 2 Connectan802 3Type1orType2 orLTPoE compat ible PD to RJ45 conne...

Страница 3: ...ent readings ThesenseresistorusedwiththeLTC4274Amust be 0 25 1 or better and with a power rating that can handle the maximum DC current passed through it A dedicatedsensetracefromtheSENSEpinoftheLTC42...

Страница 4: ...thernet ports can be subject to significant cable surge events TokeepPoEvoltagesbelowasafelevelandprotect the application against damage protection components are required at the main supply at the LT...

Страница 5: ...VEE TVSBULK C4 1 F 100V OUT VEE DC1814A F05 C5 0 22 F 100V Q1 FDMC86102 RS1 0 25 CSRN2512FKR250 D3 SMAJ58A 18 22 19 25 26 27 39 30 31 32 D4 S1B D5 S1B D1 3 9V MMSZ4686T1 R11 1k 1 4W Figure 5 High Surg...

Страница 6: ...1 Top Layer Top Silkscreen Layer 2 VIN 1 Layer 3 VIN 2 Layer 4 Bottom Layer Bottom Silkscreen Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 7: ...1 RS1 RES 2512 0 25 1 2W STACKPOLE CSRN2512FKR250 22 4 MH1 MH4 STAND OFF NYLON 0 75 KEYSTONE 8834 SNAP ON 23 2 SW1 SW2 SWITCH MOMENTARY PUSHBUTTON W RTH 434 123 050 816 24 1 Q1 XSTR MOSFET N CHANNEL...

Страница 8: ...HE 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 R...

Страница 9: ...Corporation makes no representa tion that the interconnection of its circuits as described herein will not infringe on existing patent rights Assembly Drawing Downloaded from Arrow com Downloaded fro...

Страница 10: ...Y 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...