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Linear Technology DC1145B, Demo Manual

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Linear Technology DC1145B Demo Manual Download Page 6

6

dc1145bf

DEMO MANUAL DC1145B

41

1

R20

Res., Chip 100 0.1W 5% 0603

Vishay, CRCW0603100RJNEA

42

1

T1 

Transformer, PoE

Pulse, PA1138NL

43

1

U1

I.C., PoE Switching Reg. DFN(16)(DHC)5mm 

×

 3mm

Linear Tech.Corp.LTC4267CDHC#PBF

44

1

U2 

I.C., Prog. Reference SO8NB

Linear Tech. Corp., LT1431CS8#PBF

Additional Demo Board Circuit Components

1

0

C7, C12 (Opt)

Cap., 0603 

 

2

0

C15 (Opt)

Cap., 1206  

 

3

0

J3 (Opt)

Headers, Dbl. Row 2mm Ctrs.  

CommConn Con Inc., 2202S-06G2

4

0

R18 (OPT)

Res., 1206

Hardware for Demo Board Only

1

1

D10 

LED, GRN  

Panasonic, LN1351CTR

2

8

E1, E2, E3, E4, E5, E6, E7, E8 

Turret, Testpoint  

Mill Max, 2501-2-00-80-00-00-07-0

3

1

J1 

Pulse Jack, PowerJack T12  

Pulse Engrng., JK0-0044NL

4

1

J2 

Connector, Wall Adapter  

Cui Inc., PJ-002AH

5

4

MH1, MH2, MH3, MH4

STAND-OFF, NYLON 0.25" tall 

KEYSTONE, 8831(SNAP ON)

6

1

R17 

Res., Chip 2k 0.06W 5% 0603

Vishay CRCW06032K00JNEA

7

1

FAB, 1145B_Rev1

DEMO CIRCUIT 1145B

PARTS LIST

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Summary of Contents for DC1145B

Page 1: ...TER CONDITIONS VALUE Minimum Turn on Voltage Input from PSE IOUT 100mA 39V Maximum Turn off Voltage Input from PSE 33V Operating PoE Voltage Input from PSE IOUT 0 to Maximum Output Current 37V to 57V Maximum Input Current Input from PSE 350mA Maximum Output Current Input from PSE VOUT 12V 0 9A Output Voltage Input from PSE IOUT 0 to Maximum Output Current 12V 2 PD Power Class RCLASS R7 45 3 Ohm Cl...

Page 2: ...back converter operates at a typical switching frequency of 200kHz controlled by the current mode controller portion of the LT4267 Galvanic isolation is achieved through transformer T1 capacitor C14 and opto isolators ISO1 and ISO2 The primary side power path is comprised of C1 L1 C9 of T1 Q2 and R6 These components should be as closetoeachotheraspossiblewhenlayingouttheprinted circuit board In an...

Page 3: ...ered by an alternate input power supply Connect 48V through the PoE and PoE terminals Only one set of connections is necessary Do not connect more than one power source 6 Increase the load at VOUT up to 0 9A Observe the output regulation ripple voltage efficiency and other parameters 7 MeasurePWRGDandSIGDISArelativetoPOE Verify PWRGD is logic low and SIGDISA is logic low 8 Connect a 12V auxiliary ...

Page 4: ... 99 12 12 01 12 02 12 03 12 04 12 05 0 0 2 0 4 0 6 0 8 1 Output Voltage V Output Current A Vin 37V Vin 48V Vin 57V Figure 2 Efficiency Input Voltage VIN is measured at RJ45 Jack Figure 3 Output Voltage Regulation Figure 2 and 3 are measured data for a typical DC1145B Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 5: ...W SOD323 Diodes Inc 1N4148WS 7 F 20 1 ISO1 Opto Iso NEC High Ctr PbF NEC PS2911 1 K A 21 1 ISO2 Opto Iso 4PIN MFLAT SINGLE DC HIGH V COUPLER NEC PS2913 1 K A 22 1 L1 Inductor 8 2μH DO1608C COILCRAFT DO1608C 822ML 23 1 Q1 XSTR High Voltage PbF SOT23 ON Semi MMBTA42LT1G 24 1 Q2 MOSFET N Chan 200V SUPERSOT 6LEADS Fairchild Semi FDC2612 25 1 R1 Res Chip 13 0 1W 5 0805 Vishay CRCW080513R0JNEA 26 2 R2 R...

Page 6: ...Inc 2202S 06G2 4 0 R18 OPT Res 1206 Hardware for Demo Board Only 1 1 D10 LED GRN Panasonic LN1351CTR 2 8 E1 E2 E3 E4 E5 E6 E7 E8 Turret Testpoint Mill Max 2501 2 00 80 00 00 07 0 3 1 J1 Pulse Jack PowerJack T12 Pulse Engrng JK0 0044NL 4 1 J2 Connector Wall Adapter Cui Inc PJ 002AH 5 4 MH1 MH2 MH3 MH4 STAND OFF NYLON 0 25 tall KEYSTONE 8831 SNAP ON 6 1 R17 Res Chip 2k 0 06W 5 0603 Vishay CRCW06032K...

Page 7: ...GY D 0LOSLWDV 3KRQH 0F DUWK OYG 7 21 17 25 86720 5 86 21 86720 5 127 1 5 7 12 2 6 0 67 257 72 6 1 5 8 7 7 7 0 76 86720 5 6833 63 7 216 2 9 5 7 5 0 16 7 86720 5 6 5 63216 7 72 9 5 3523 5 1 5 23 5 7 21 1 7 78 33 7 21 20321 17 68 67 787 21 1 35 17 5 8 7 2 5 287 0 6 1 17 7 5 8 7 3 5 250 1 25 5 7 217 7 1 5 7 12 2 33 7 216 1 1 5 1 25 66 67 1 7 6 5 8 7 6 35235 7 5 72 1 5 7 12 2 1 6 0 7 6833 25 86 7 1 5 7...

Page 8: ...INDEMNITY NEITHER PARTY 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 approp...

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