Linear Technology DC2111A-A/B Demo Manual

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Page 1

Description

DEMO MANUAL

DC2111A-A/B

LTC3774EUHE

4-Phase High Current Step-Down Converter

with Very Low DCR Inductor

Demonstration circuit DC2111A features the LTC®3774 in a 4-phase, high output current step-down converter with sub-mΩ DCR sensing. This high performance converter operates at a switching frequency of 400kHz over an input voltage range of 10V to 14V. The 5mm × 5mm DrMOS and 0.33µH/0.325mΩ inductor provide high efficiency while supplying 30A per phase. The board comes in two assembly types. The –A assembly provides a 1.2V/90A converter with N+1 MOSFET failure protection and the –B assembly provides a high efficiency 1.2V/120A converter.

1.2V/90A Converter with N+1 MOSFET Failure Protection

The –A assembly is intended for high reliability applica tions which have a very low tolerance for down-time or which operate in rugged environments. Each phase of the

1.2V/90A hot swap circuit on the input and an LTC4352 ideal diode on its output. If an internal DrMOS MOSFET fails, then that phase will be isolated from the rest of the circuit and the converter will continue to operate with only a small perturbation on the output and will provide the full rated 90A load. Once a fault is detected, the PWM signal for that phase will be floated. This in turn will signal the DrMOS to pull its TG and BG signals low. Examples of the converter’s response to MOSFET failures can be seen in Figure 2 and Figure 3. Further protection is provided by a dedicated 5V bias supply for each phase. If the 5V bias for a given phase is pulled down due to a DrMOS failure or other fault, the 5V bias for the other phases will not be affected.

In case of an overvoltage event, an external overvoltage protection circuit will pull down the output. The LTC3774 does have its own crowbar type overvoltage protection,

converter is protected by its own LTC4226-1

but the ideal diodes will prevent the bottom FETs from pulling down the output once an overvoltage is detected. The external OVP comparator will also provide overvolt age protection in case the voltage sense lines are shorted or reversed.

For a 12V input, the –A assembly provides a full load ef ficiency of 89.3% and a peak efficiency of 90.6% which occurs around 50% load.

1.2V/120A High Efficiency Converter

The –B assembly is a high efficiency 1.2V/120A 4-phase converter. Given that it does not have the MOSFET failure protection and redundancy of the –A assembly, it provides higher efficiency and more output current. For a 12V input it provides a full load efficiency of 90.6% and a peak ef ficiency of 93.1% which occurs at 55% load.

More Features

Both assembly types provide many features. These include

•

Remote sensing

• CLKIN and CLKOUT pins

• PGOOD, RUN and TRACK/SS pins

• Dynamic load circuit

• Optional phase shedding circuit

The LTC3774 data sheet provide a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2111A-A/-B

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

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DEMO MANUAL DC2111A-A/-B

performance summary

Table 1. A Converter (TA = 25°C, No Airflow)

PARAMETER CONDITION VALUE

Minimum Input Voltage 10V

Maximum Input Voltage 14V

Output Voltage V

OUT(MAX)

Nominal Switching Frequency 400kHz

Efficiency, See Figure 6 V

Table 2. B Converter (TA = 25°C, No Airflow)

PARAMETER CONDITION VALUE

Minimum Input Voltage 10V

Maximum Input Voltage 14V

Output Voltage V

OUT(MAX)

Nominal Switching Frequency 400kHz

Efficiency, See Figure 7 V

OUT

VIN = 10V to 14V 90A

OUT

VIN = 10V to 14V 120A

Specifications are at TA = 25°C

= 0A to 90A, VIN = 10V to 14V 1.2V ± 1.5%

OUT

= 1.2V, I

OUT

= 0A to 120A, VIN = 10V to 14V 1.2V ± 1.5%

OUT

= 1.2V, I

OUT

= 90A, VIN = 12V 89.3% Typical

OUT

= 120A, VIN = 12V 90.6% Typical

OUT

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Page 3

Quick start proceDure

DEMO MANUAL

DC2111A-A/B

The evaluation setup for demonstration circuit 2111A is shown in Figure 1. To test the board, follow the procedure below:

1) With power off, connect the input supply, load and meters as shown in the setup drawings. Preset the load to 0A and V

2) Place the jumpers in the following positions:

JP1 RUN ON

JP2 MODE CCM

JP5 IDEAL DIODE

3) Set the input voltage to 12V.

4) Check the output voltage. The output voltage should be within the regulation limits shown in the Performance Summary table.

5) Next, apply full load and re-measure V output voltage again to make sure it is within the regulation limits.

Adjust the input voltage and load current to the desired

6) levels within their limits and observe the regulation, output ripple, load step response, efficiency and other parameters.

Note 1. To monitor the output voltage ripple, use the BNC connectors labeled V

supply to be 0V.

MODE

OUT

DIODE A ONLY

. Check the

OUT

Note 3. For loads less than 5A, some low level noise may appear on the output of the –A assembly. This is due to the normal operation of the ideal diodes and the slight current sharing discrepancy between the phases. To avoid this, place the DIODE jumper in the REV I ALLOWED setting. This will allow reverse current to flow through the diodes for clean output voltage ripple. However, the output will not be protected from faults which short the switch node to ground.

Dynamic Load Circuit (Optional)

Demonstration circuit 2111A provides a simple dynamic load circuit consisting of a MOSFET and sense resistor. To use the circuit, follow the steps below:

1. Connect the output of the pulse generator between PULSE GEN and GND.

2. Connect the BNC labeled LOAD STEP to an oscilloscope.

3. Connect the BNC labeled V

4. Preset the amplitude of a pulse generator to 0V and the duty cycle to 5% or less.

5. With the converter running, slowly increase the am plitude of the pulse generator output to provide the desired load step signal is 2mV/A.

step pulse height. The scaling for the load

to an oscilloscope.

OUT

Note 2. Do not connect load between the VOS+ and VOS– turrets. This could damage the converter. Only apply load across the VOUT+ and VOUT– stud connectors on the edge of the board.

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DEMO MANUAL DC2111A-A/-B

Quick start proceDure

COUT3

OUT

–

+ –

OUT

Figure 1. Proper Measurement Equipment Setup for DC2111A-A/-B

+ –

–

SUPPLY

dc2111aab F01

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Quick start proceDure

(AC)

OUT

50mV/DIV

IN4

10V/DIV

HiZB4

5V/DIV

PWM4

5V/DIV

VSW1

10V/DIV

VSW2

10V/DIV

VSW3

10V/DIV

VSW4

10V/DIV

DEMO MANUAL

DC2111A-A/B

50µs/DIV

dc2111aab F02

Figure 2. 1.2V/90A Converter with N+1 MOSFET Failure Protection. Top MOSFET of Phase 4 Shorted Drain to Source with Full Load on the Output and a 12V Input. The Output Continues to Regulate with Only a small Perturbation on the Output.

(AC)

OUT

50mV/DIV

IN1

10V/DIV

HiZB1

5V/DIV

PWM1

5V/DIV

VSW1

10V/DIV

VSW2

10V/DIV

VSW3

10V/DIV

VSW4

10V/DIV

Figure 3. 1.2V/90A Converter with N+1 MOSFET Failure Protection. Bottom MOSFET of Phase 1 Shorted Drain to Source with Full Load on the Output and a 12V input. The Output Continues to Regulate with Only a Small Perturbation on the Output.

50µs/DIV

dc2111aab F03

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DEMO MANUAL DC2111A-A/-B

Quick start proceDure

(AC)

OUT

100mV/DIV

90A

LOAD STEP

20A/DIV

45A

50µs/DIV

dc2111aab F04

Figure 4. 45A to 90A Load Step Response of the 1.2V/90A Converter with N+1 MOSFET Failure Protection Circuit. VIN = 12V.

(AC)

OUT

100mV/DIV

120A

LOAD STEP

20A/DIV

60A

Figure 5. 60A to 120A Load Step Response of the 1.2V/120A High Efficiency Converter. V

50µs/DIV

dc2111aab F05

= 12V.

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Quick start proceDure

DEMO MANUAL

DC2111A-A/B

EFFICIENCY (%)

10V 12V 14V

IN IN IN

EACH PHASE: DrMOS = FDMF5820DC, BOOST R = 0Ω L = WURTH 744301033 (0.33µH, 0.32mΩ) HOT SWAP CIRCUIT: LTC4226-1 WITH FDMS86500DC IDEAL DIODES: LTC4352 WITH BSC010NE2LS DrMOS BIAS = 5.6V BIAS POWER INCLUDED IN EFFICIENCY MEASUREMENT

40 60 80 100200

LOAD CURRENT (A)

dc2111aab F06

Figure 6. Efficiency Curves for the 1.2V/90A Converter with N+1 MOSFET Failure Protection. No Airflow.

100

10V

12V

14V

EFFICIENCY (%)

Figure 7. Efficiency Curves for the 1.2V/120A High Efficiency Converter. No Airflow.

EACH PHASE: DrMOS = FDMF5820DC, BOOST R = 0Ω L = WURTH 744301033 (0.33µH, 0.32mΩ) DrMOS BIAS = 5.6V BIAS POWER INCLUDED IN EFFICIENCY MEASUREMENT

40 60 80 100 120 140200

LOAD CURRENT (A)

dc2111aab F07

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DEMO MANUAL DC2111A-A/-B

Quick start proceDure

IDEAL DIODES

INDUCTORS

DrMOS

HOT SWAP

OUT

PHASE 2 PHASE 3 PHASE 4PHASE 1

Figure 8. Thermal Image of the 1.2V/90A Converter with N+1 MOSFET Failure Protection. Measured with Full Load and an Input Voltage of 12V. T

= 21°C. Hot Spot is the DrMOS of

AMB

Phases 2 with a Rise Over Ambient of 50°C.

OUT

0mΩ JUMPERS

INDUCTORS

DrMOS

0mΩ JUMPERS

PHASE 2 PHASE 3 PHASE 4PHASE 1

dc2111aab F08

Figure 9. Thermal Image of the 1.2V/90A Converter with N+1 MOSFET Failure Protection. Measured with Full Load and an Input Voltage of 12V. T Phases 2 with a Rise Over Ambient of 50°C.

= 21°C. Hot Spot is the DrMOS of

AMB

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DEMO MANUAL

DC2111A-A/B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 9 C1, C6, C18, C20, C27, C30, C41, C43,

C66

2 1 C10 CAP, 4.7nF, 5%, 25V, X7R 0603 AVX, 06033C472JAT2A

3 4 C11, C24, C33, C45 CAP, 1µF 20% 25V X5R 0603 AVX, 06033D105MAT2A

4 2 C15, C37 CAP, 4.7µF 20% 10V X5R 0805 AVX, 0805ZD475MAT2A

5 2 C17, C39 CAP, 1µF 20% 25V X5R 0603 AVX, 06033D105MAT2A

6 12 C2, C12, C13, C14, C16, C19, C28, C34,

C35, C36, C38, C40

7 4 C23, C25, C46, C47 CAP, 100pF 10% 25V NPO 0603 AVX, 06033A101KAT2A

8 1 C4 CAP, 47pF 5% 50V NPO 0603 AVX, 06035A470JAT2A

9 4 C5, C21, C29, C42 CAP, 0.1µF 10% 25V X7R 0603 AVX, 06033C104KAT2A

10 1 C50 CAP, 10µF 20% 6.3V X5R 0805 AVX, 08056D106MAT2A

11 1 C73 CAP, 0.1µF 10% 25V X7R 0603 AVX, 06033C104KAT2A

12 2 C8, C32 CAP, 330pF 10% 25V NPO 0603 AVX, 06033A331KAT2A

13 1 C9 CAP, 0.01µF 10% 25V X7R 0603 AVX, 06033C103KAT2A

14 8 CIN1, CIN2, CIN3, CIN4, CIN8, CIN9,

CIN11, CIN12

15 2 CIN5, CIN10 CAP, 22µF 10% 16V X5R 1210 MURATA, GRM32ER61C226KE20L

16 2 CIN6, CIN7 CAP, 150µF, 25%, 25V, ALUM CORPORATION, 25HVH150M

17 8 COUT1, COUT2, COUT9, COUT10,

COUT11, COUT12, COUT19, COUT20

18 12 COUT3, COUT4, COUT5, COUT6,

COUT7, COUT8, COUT13, COUT14, COUT15, COUT16, COUT17, COUT18

19 9 D1, D2, D3, D4, D6, D8, D11, D13, D18 DIODE, 1N4448HWT SOD523 DIODES INC, 1N4448HWT-7

20 2 D5, D10 DIODE, CMHZ4701 SOD123 CENTRAL SEMI, CMHZ4701

21 2 D7, D12 DIODE, CMHZ4683 SOD123 CENTRAL SEMI, CMHZ4683

22 1 D9 DIODE, SMAJ17A SMA-DIODE DIODE INC, SMAJ17A-13-F

23 4 L1, L2, L3, L4 IND, 0.33µH 20% WURTH ELEKTRONIK 744301033

24 4 Q1, Q2, Q5, Q6 MOSFET, BSC010NE2LS LFPAK INFINEON, BSC010NE2LS

25 4 Q3, Q4, Q7, Q8 MOSFET, FDMS86500DC POWER56 FAIRCHILD, FDMS86500DC

26 1 R1 RES, 100k 1% 1/10W

27 4 R12, R40, R61, R84 RES, 24.9k 1% 1/10W 0603 VISHAY, CRCW060324K9FKEA

28 10 R13, R42, R45, R62, R86, R91, R112,

R180, R181, R182

29 1 R154 RES, 2k 5% 1/4W 1206 VISHAY, CRCW12062K00JNEA

30 1 R16 RES, 1.69k 1% 1/10W 0603 VISHAY, CRCW06031K69FKEA

31 4 R18, R29, R65, R72 RES, 4.64k 1% 1/10W 0603 VISHAY, CRCW06034K64FKEA

32 4 R183, R184, R185, R186 RES, 100Ω 1% 1/16W 0603 VISHAY, CRCW0603100RFKEA

33 1 R187 RES, 100Ω 1% 1/10W 0805 VISHAY, CRCW0805100RFKEA

34 1 R19 RES, 30.1k 1% 1/10W 0603 VISHAY, CRCW060330K1FKEA

35 1 R2 RES, 56.2k 1% 1/10W 0603 VISHAY, CRCW060356K2FKEA

36 4 R20, R27, R66, R73 RES, 931Ω 1% 1/10W 0603 VISHAY, CRCW0603931RFKEA

CAP, 2.2µF 10% 16V X5R 0603 MURATA, GRM188R61C225KE15D

CAP, 0.22µF 10% 25V X7R 0603 AVX, 06033C224KAT2A

CAP, 22µF, 10%, 16V, X5R, 1210 MURATA, GRM32ER61C226KE20L

CAP, 100µF 20% 6.3V X5R 1206 MURATA, GRM31CR60J107ME39L

CAP, 330µF 20% 2.5V POSCAP 7343 PANASONIC, 2R5TPE330M9

0603 VISHAY

RES, 0Ω JUMPER 0603 VISHAY, CRCW06030000Z0EA

, CRCW0603100KFKEA

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DEMO MANUAL DC2111A-A/-B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

37 2 R23, R69 RES, 37.4k 1% 1/10W 0603 VISHAY, CRCW060337K4FKEA

38 2 R24, R34 RES, 10Ω 1% 1/10W 0603 VISHAY, CRCW060310R0FKEA

39 4 R3, R32, R56, R78 RES, 1Ω 1% 1/10W 0603 VISHAY, CRCW06031R00FKEA

40 2 R30, R75 RES, 2.2Ω 1% 1/10W 0603 VISHAY, CRCW06032R20FKEA

41 2 R37, R82 RES, 30.1k 1% 1/10W 0603 VISHAY, CRCW060330K1FKEA

42 2 R39, R83 RES, 2.4M 1% 1/10W 0603 VISHAY, CRCW06032M40FKEA

43 18 R4, R10, R15, R21, R28, R31, R33,

44 2 R41, R85 RES, 38.3k 1% 1/10W 0603 VISHAY, CRCW060338K3FKEA

45 2 R44, R88 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

46 18 R5, R6, R7, R9, R11, R17, R22, R35,

47 1 R64 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

48 4 RS1, RS2, RS3, RS4 RES, 0.007Ω, 1% 1W 2512 VISHAY, WSL25127L000FEA

49 4 U1, U4, U7, U10 MOSFET, DrMOS DC-DC 2MHz QFN-5X5-31 FAIRCHILD, FDMF5820DC

50 4 U2, U5, U8, U11 IC, LTC4352CDD DFN12DD LINEAR TECHNOLOGY, LTC4352CDD#PBF

51 2 U3, U9 IC, LTC3774EUHE UHE-5X6-36P+1 LINEAR TECHNOLOGY, LTC3774EUHE#PBF

52 2 U6, U12 IC, LTC4226CUD-1 QFN16UD-3X3 LINEAR TECHNOLOGY,LTC4226CUD-1#PBF

Bias Supplies

1 1 C66 CAP, 2.2µF 10% 16V X5R 0603 MURATA, GRM188R61C225KE15D

2 2 C52, C57 CAP, 1µF 10% 25V X5R 0805 AVX, 08053D105KAT2A

3 4 C53, C54, C61, C64 CAP, 10µF 20% 6.3V X5R 0805 AVX, 08056D106MAT2A

4 4 C55, C56, C62, C63 CAP, 0.01µF 10% 25V NPO 0603 AVX, 06033C103KAT2A

5 4 R114, R115, R127, R128 RES, 0Ω JUMPER 0603 VISHAY, CRCW06030000Z0EA

6 4 R116, R117, R130, R131 RES, 1M 5% 1/16W 0603 VISHAY, CRCW06031M00JNEA

7 4 R122, R123, R133, R134 RES, 255k 1% 1/10W 0603 VISHAY, CRCW0603255KFKEA

8 4 R125, R126, R137,

9 2 U15, U16 IC, LT3027EDD DFN10DD LINEAR TECHNOLOGY, LT3027EDD#PBF

Overvoltage Comparator

1 1 R129 RES, 0Ω JUMPER 0603 VISHAY, CRCW06030000Z0EA

2 2 C58, C59 CAP, 1µF 20% 25V X5R 0603 AVX, 06033D105MAT2A

3 1 U17 IC, LT6656BIS6-25 SOT6 LINEAR TECHNOLOGY, LT6656BIS6-2.5#PBF

4 1 R136 RES, 931k 1% 1/10W 0603 VISHAY, CRCW06039K31FKEA

5 1 R140 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

6 1 R132 RES, 1k 1% 1/10W 0603 VISHAY, CRCW06031K0FKEA

7 1 R135 RES, 100k 1% 1/10W 0603 VISHAY, CRCW0603100KFKEA

8 1 R178 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

9 1 C65 CAP, 1µF 20% 25V X5R 0603 AVX, 06033D105MAT2A

R48, R50, R57, R63, R67, R68, R74, R76, R77, R93, R95

R36, R46, R52, R58, R60, R79, R80, R89, R96, R104

R138 RES, 73.2k 1% 1/10W 0603 VISHA

RES, 0Ω JUMPER 0603 VISHAY, CRCW06030000Z0EA

RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

Y, CRCW060373K2FKEA

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DEMO MANUAL

DC2111A-A/B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

10 1 R147 RES, 11k 1% 1/10W 0603 VISHAY, CRCW060311K0FKEA

11 1 R149 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

12 1 R145 RES, 25.5k 1% 1/10W 0603 VISHAY, CRCW060325K5FKEA

13 1 R146 RES, 100k 1% 1/10W 0603 VISHAY, CRCW0603100KFKEA

14 2 R151, R152 RES, 1k 1% 1/10W 0603 VISHAY, CRCW06031K0FKEA

15 1 R150 RES, 100Ω 1% 1/16W 0603 VISHAY, CRCW0603100RFKEA

16 1 Q11 MOSFET, BSC010NE2LS LFPAK INFINEON, BSC010NE2LS

17 1 Q12 TRANSISTOR, NPN, MMBT3904L SOT23 ON SEMI, MMBT3904LT1G

18 1 R148 RES, 0.1Ω 1% 1W 2512 VISHAY, WSL2512R1000FEA

19 1 U14 IC, LTC6702IDC DFN8DC LINEAR TECHNOLOGY, LTC6702IDC#PBF

Dynamic Load Circuit

1 1 Q10 MOSFET, FDB8832 TO263AB FAIRCHILD, FDB8832

2 1 R104 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

3 1 R109 RES, 0.002Ω 1% 1W 2512 VISHAY, WSL25122L000FEA

Additional Demo Board Circuit Components

1 0 C3 CAP, OPT 0805 OPT

2 1 C31 CAP, 1µF 10% 25V X7R 0603 AVX, 06033C104KAT2A

3 0 C69, C74 CAP, OPT 1206 OPT

4 0 C7, C22, C26, C44, C48, C49, C51, C60,

C67, C68

5 0 C70 CAP, OPT 0402 OPT

6 0 C71 CAP, OPT 0805 OPT

7 0 C72 CAP, OPT 0603 OPT

8 0 CIN13 CAP, OPT 25V OSCON OPT

9 0 COUT21 TO COUT28 CAP, OPT POSCAP 7343 OPT

10 0 D14, D15, D16, D17 DIODE, OPT SOD523 OPT

11 0 D19, D20 DIODE, OPT SOD523 OPT

12 1 D21 DIODE, CMHZ4701 SOD123 CENTRAL SEMI, CMHZ4701

13 4 D22, D23, D24, D25 DIODE, 1N4448HWT SOD523 DIODES INC, 1N4448HWT-7

14 0 JP3 HEADER, OPT 3 PIN 0079 SINGLE OPT

15 0 L5 IND, OPT OPT

16 0 Q9 MOSFET, FDB8832 TO263AB OPT

17 1 R140 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

18 0 R141, R142, R143, R144 RES, OPT 1206 OPT

19 0 R153, R174, R175 CAP, OPT 0603 OPT

20 0 R169, R170, R171, R172, R173 RES, OPT 0402 OPT

21 1 R176 RES, 75k 1% 1/10W 0603 VISHAY, CRCW060375K0FKEA

22 1 R177 RES, 10k 1% 1/10W 0603 VISHAY, CRCW060310K0FKEA

CAP, OPT 0603 OPT

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DEMO MANUAL DC2111A-A/-B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

23 1 R179 RES, 2k 5% 1/4W 1206 VISHAY, CRCW12062K00JNEA

24 0 R47, R51, R54, R55, R90, R92, R97,

R98

25 0 R8, R14, R25, R26, R38, R43, R49,

R53, R59, R70, R71, R81, R87, R94, R99, R100, R101, R102, R103, R105, R106, R107, R108, R110, R111, R113, R118, R119, R120, R121, R139, R155, R156, R157, R158, R159, R160, R161, R162, R163, R164, R165, R166, R167, R168, R188, R189, R190, R191

26 0 RN1 NTC, OPT 0603 / 0805 OPT

27 0 U13 IC, OPT DFN8DC OPT

28 0 U18 IC, OPT SOT23-5 OPT

29 1 U20 IC, LT6703IDC-3 DFN3DC LINEAR TECHNOLOGY, LT6703IDC-3#PBF

Hardware: For Demo Board Only

1 12 E1 TO E12 TESTPOINT, TURRET, 0.095" MILL MAX, 2501-2-00-80-00-00-07-0

2 1 JP1 HEADER, 3 PIN 0.079 SINGLE ROW WURTH ELEKTRONIK 62000311121

3 1 JP2 HEADER, 4 PIN 0.079 SINGLE ROW WURTH ELEKTRONIK 62000411121

4 2 XJP1, XJP2 SHUNT, 0.079" CENTER WURTH ELEKTRONIK 60800213421

5 8 J1, J2, J3, J4, J5, J6, J7, J8 STUD, TEST PIN PEM, KFH-032-10

6 16 J1, J2, J3, J4, J5, J6, J7, J8 (x2) NUT, BRASS PL # 10-32 ANY, #10-32M/S

7 8 J1, J2, J3, J4, J5, J6, J7, J8 RING, LUG # 10 KEYSTONE, 8205

8 8 J1, J2, J3, J4, J5, J6, J7, J8 WASHER, TIN, PLATED BRASS #10EXT BZ TN

9 2 J9, J10 CON, BNC, 5 PINS CONNEX, 112404

10 1 J11 HEADER, DBL ROW, RT ANGLE, 2X4, 8PIN MILL-MAX, 802-10-008-20-001000

11 1 J12 SOCKET, DBL ROW, RT ANGLE, 2X4, 8PIN MILL-MAX, 803-43-008-20-001000

12 4 MTGS AT 4 CORNERS STAND-OFF, NYLON 0.5" KEYSTONE, 8833 (SNAP ON)

13 1 JP5 HEADER, 3 PIN 0.079 SINGLE ROW WURTH ELEKTRONIK, 62000311121

14 1 XJP5 SHUNT, 0.079" CENTER WURTH ELEKTRONIK 60800213421

RES, OPT 2512 OPT

RES, OPT 0603 OPT

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DEMO MANUAL

DC2111A-A/B

schematic Diagram

PRODUCTION3 01-18-17

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

HIZB1

TP2

R112

R183

100

LTC4352CDD

OUT

FAULT

STATUS

GATE

GND

SOURCE

CPO

VIN

REV

VCC

C11

1uF

5VBIAS1

R13

-A

BSC010NE2LS

IDEAL ORING DIODES

0.1uF

5VBIAS1

6.3V

1206

COUT2

COUT1

100uF

VOUT1

TP1

R12

24.9K

16V

C6 2.2uF

PVCC

PGND

TMON

VIN11VIN33PGND12PGND13PGND14PGND

PGND

VIN10VIN

CIN2

10K

R11

10K

47pF

OPT

VOSNS

R14

OPT

R10

TRACK/SS

CIN1

R15

VOS-

22uF

HIZB1

R16

INTVCCA

25V

R17

0.33uH 744301033

WURTH EL.

SW24SW25SW

FDMF5820DC

1210

RUN

TP4

ITH

ITEMP

1.69K

C10

10K

132

MODE

R18

SNSDC1+

330pF

4.7nF

0.01uF

4.64K

R188 OPT

R19

CCM

5VBIAS1

-B

10K

INTVCCA

OPT

10K

PWM

ZCD#

EN/FAULT#

VCC

AGND

2.2uF

16V

AGND

BOOT

PHASE

0.22uF

VIN

C31

0.1uF

RUN

R64

10K

OPT

0805

VIN

R153

10K

56.2K

D18

R154

-A

1N4448HWT

INTVCCA

1N4448HWT

VIN1

VIN3

VIN2

100K

1N4448HWT

1206

1N4448HWT

VIN4

RUN

1N4448HWT

132

VOS+

TK/SS

JP1

OFF

PGOOD

VOS+

R21

R20

931

C12

0.22uF

SNS1-

GND

SNSDC1+

RUN1

PWM1

PWMEN1

HIZB1

TK/SS1

VOSNS1+

VOSNS1-

ITH1

ITEMP1

ILIM129MODE/PLLIN

PHMODE30FREQ31CLKOUT33INTVCC34VIN35ILIM2

FSW = 400kHz

ILIM

30.1K

R22

CLKINA

JP2

VOS+

C13

R23

10K

0.22uF

SNSAC1+

37.4K

TP17

CLKINA

VOUT+

R24

VOUT

C14

0.22uF

SNS2-

PGOOD214PGOOD1

SNSAC2+

LTC3774EUHE

C15

R25

INTVCCA

CLKOUTA

VOUT+

4.7uF

OPT

COUT6

COUT5

SNSDC2+

C16

0.22uF

SNSDC2+

0805

10V

COUT7

COUT3

GND

R26

VOUT+

COUT8

COUT4

R189 OPT

GND

RUN2

PWM2

PWMEN2

HIZB2

TK/SS2

VOSNS2+

VOSNS2-

ITH2

ITEMP2

OPT

VOUT-

1.2V / *

2.5V

330uF

2.5V

330uF

VOS-

R34

VOS-

BSC010NE2LS

C21

R184

0.1uF

HIGH EFFICIENCY

OUT

100

GATE

CPO

VIN

LTC4352CDD

-B

R51

R47

2512

0.000

VOUT1 VOUT

VOUT2

HIZB2

TP7

R180

FAULT

STATUS

GND

SOURCE

REV

VCC

C24

1uF

5VBIAS2

R42

5VBIAS2

COUT9

COUT10

6.3V

100uF

1206

TP6

10K

PWM

ZCD#

VCC

AGND

BOOT

PHASE

VIN

1N4448HWT

R39

2.4M

CMHZ4701

30.1K

EN/FAULT#

CMHZ4683

VOUT2

R40

24.9K

2.2uF

16V

C20

PVCC

PGND

TMON

VIN11VIN33PGND12PGND13PGND14PGND

PGND

VIN10VIN

CIN3

CIN4

VIN1

1N4448HWT

FDMS86500DC

RS1

0.007

VIN

E11

VIN+

22uF

2512

CIN5

CIN7

25V

R41

CIN6

10V - 14V

0.33uH WURTH EL.

FDMF5820DC

1210

/FLT2

C22

R43

38.3K

1210

25V

22uF

150uF

25V

744301033

SW24SW25SW

5VBIAS1

/FLT1

OPT

SMAJ17A

HIZB1

HIZB2

R46

R52

10K

R48

OUT1

FTMR1

GATE1

SENSE1

VCC1

ON1

CLS

R44

10K

R45

E12

VIN-

R50

FAULT1

FAULT2

GND

R49

OPT

5VBIAS2

100pF

C23

C25

100pF

OUT2

FTMR2

C26

R53

GATE2

SENSE2

LTC4226CUD-1

VCC2

ON213GND

VIN1

-B

R54

VIN

HIGH EFFICIENCY

VIN2

OPT

2512

RS2

0.007

VIN2

R55

2512

0.000

R28

R27

931

R29

4.64K

5VBIAS2

R32

R31

TP5

ITEMP

C17

1uF

2.2

R30

R36

INTVCCA

R38

OPT

R35

10K

2.2uF

C18

16V

R33

C19

0.22uF

TK/SS

HIZB2

RUN

ITH

VOS-

VOSNS

-A

1 2

R37

INPUT HOT SWAP CIRCUITS

FDMS86500DC

2512

www.linear.com

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

TECHNOLOGY

SCHEMATIC

TITLE:

APPROVALS

PCB DES.

APP ENG.

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 LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

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 LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

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 LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

90A

120A

IOUT(MAX)

N+1 MOSFET FAILURE PROTECTION

HIGH EFFICIENCY CONVERTER

-A

-B

NOTE: UNLESS OTHERWISE SPECIFIED

SHEET OF

DC2111A

LTC3774EUHE

Wednesday, January 18, 2017

4 PHASE HIGH CURRENT STEP-DOWN

CONVERTER WITH VERY LOW DCR INDUCTOR

IC NO. REV.

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

SCALE = NONE

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

OPT, OPTIONAL: NOT STUFFED

-A: STUFFED ON -A ASSEMBLY ONLY

-B: STUFFED ON -B ASSEMBLY ONLY

1. ALL RESISTORS ARE IN OHMS, 0603.

2. ALL CAPACITORS ARE 0603.

dc2111aabf

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Page 14

DEMO MANUAL DC2111A-A/-B

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS 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 appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

dc2111aabf

LT 0217 • PRINTED IN USA