PSAS/ SPSDesignPage

Switching Power Supply (SPS) Design Bill of Materials (BOM) for (Launch Vehicle 2b) LV2b

Below are SPS Design Schematic Revisions:

LV2b SPS Design Schematic Revisions:

Note[1]: Unless specified otherwise in the components's description, all caps are ceramic and resistors are thin or thick film. All components are surface mount technology (SMT) components. Most component packages are 0805 packages. Also all components which are not calculated/specified as of yet will be given descriptions of "TBD".

Note[2]: RoHS Compliant Convention in the component description:

Since we will be using leaded solder, we can use parts with or without lead so being RoHS compliant is not critical.

Note[3]: There are some components (0805) which are possibly available from PSAS's current inventory, if not, the components will either be listed under the sub-heading "Choices:" or will be listed alone if there is only one choice.

Note[4]: This BOM is with respect to revision rev2_2 of the SPS_Design_Schematics listed above. All reference designators which did not change from the previous LV2 SPS design schematic as is specified in the SPS Design Notes in pages 3 - 31, are kept the same. All new reference designators in the new LV2b SPS Design schematic will have the number "5" as the second digit. These designators will become permenant after the final design review.

Note[5]: There are three IC's in this design: LT1767EMS8, MAX5902AAETT and TLV3012AIDBVT from Linear Technology, Maxim-IC and Texas Instruments respectively.

Note[6]: Nearly all parts can be ordered from Digikey. If Digikey does not have it in stock then a link to the component's datasheet is included in the component description and would need to be directly ordered from the vendor and/or another manufacturer/distributor.

Note[7]: The component reference designators in this BOM are listed in alpha/numerical order.

Step-Down Switching Voltage Regulator (Buck Topology) (U200)

Inductors:

Split Buck Inductor (L200a, L200b)

Power Bus Input Choke (L201, L202)

Capacitors:

Buck Output Cap (C200)

Buck Input Cap (C201)

Boost Cap (C202)

Power Bus Input Caps (C203, C204)

LT1767 Frequency Compensation Caps (C205, C206)

LT1767 FB Resistor Network Shunt Caps (C208, C209)

LT1767 UVLO Resistor Network Shunt Cap (C210)

TLV3012AIDBVT "Secondary Power Supply" Cap (C250)

TLV3012AIDBVT Overvoltage Detection Cap (C251)

SPS Secondary Buck Output Cap (C252)

Diodes:

Buck (Catch) Schottky Diode (CR200)

Boost Rectifier Diode (CR201)

TLV3012AIDBVT "Secondary Power Supply" Schottky Diode (CR250)

SPS Secondary Buck (Catch) Schottky Diode (CR251)

SPS Output Power On LED (D201)

Discrete Components:

Power Bus Fast-Acting Fuse (F200)

MAX5902 External P-MOSFET (Q250)

TLV3012AIDBVT External Logic-Level N-MOSFET (Q251)

Power Bus Input Voltage Suppressor (TVS200)

Overcurrent/Circuit-Breaker Protection (U250)

Undervoltage/Overvoltage Protection (U251)

Resistors:

LT1767 FB Resistor Network: (R200, R201)

LT1767EMS8 Frequency Compensation Resistor (R206)

LT1767EMS8 UVLO Lockout Resistor Network: (R209, R210)

SPS Output Power On LED Current Limiter Resistor (R214)

DC Path From SPS Node GND to Chassis GND Resistor (R215)

MAX5902 Circuit-Breaker Resistor Network (R250, R251)

MAX5902AAETT Circuit-Breaker External P-MOSFET RDS(on) Additional Series Resistor (R252)

TLV3012AIDBVT Overvoltage Detection External N-MOSFET Current Limiting Resitor (R253)

TLV3012AIDBVT UVLO Lockout Resistor Network (R254, R255)

Digikey BOM

NOTE: Component fields with a "-" mean they are TBD.

Qty

Digi Key SKU

Cust ID

Part

Mfgr

Description

Mfg Num

Price

Stock

Package

Order Size

5

LT1767EMS8-ND

PSAS-SPS

U200

Linear Tech

Switching Step-Down Voltage Buck Regulator

LT1767EMS8

6.00

2716

8-MSOP

1

5

PCC2401CT-ND

PSAS-SPS

C200

Pansonic-ECG

22 uF Ceramic Cap

ECJ-2FB0J226M

8.31

4740

0805

10

5

PCC2414CT-ND

PSAS-SPS

C201

Pansonic-ECG

10 uF Ceramic Cap

ECJ-3YB1E106K

5.45

7640

1206

10

5

PCC1840CT-ND

PSAS-SPS

C202

Pansonic-ECG

0.1 uF Ceramic Cap

ECJ-2YB1H104K

1.61

21520

0805

10

5

399-3782-1-ND

PSAS-SPS

C203

Kemet

22 uF Tantalum Cap

T491D226K025AT

0.65

863

7434-31

1

5

490-3327-1-ND

PSAS-SPS

C204

Murata Electronics North America

0.33 uF Ceramic Cap

GRM219R71H334KA88D

3.09

3090

0805

10

5

-

PSAS-SPS

C205

-

-

-

-

-

-

-

5

-

PSAS-SPS

C206

-

-

-

-

-

-

-

5

-

PSAS-SPS

C208

-

-

-

-

-

-

-

5

BC1256CT-ND

PSAS-SPS

C209

BC Components

10 pF Ceramic Cap

VJ0805A100JXACW1BC

0.52

80

0805

10

5

BC1298CT-ND

PSAS-SPS

C210

BC Components

0.1 uF Ceramic Cap

VJ0805Y104KXATW1BC

0.72

60

0805

10

5

399-3127-1-ND

PSAS-SPS

C250

Kemet

2.7 uF Ceramic Cap

C0805C275K8PACTU

7.02

3860

0805

10

5

478-1359-1-ND

PSAS-SPS

C251

AVX Corp

0.015 uF Ceramic Cap

08051C153KAT2A

2.64

5300

0805

10

5

-

PSAS-SPS

C252, C252a

-

-

-

-

-

-

-

15

MA2Q70500LCT-ND

PSAS-SPS

CR200,CR250,CR251

Panasonic-SSG

30V Schottky Diode

MA2Q70500L

6.24

4192

MiniPower 2P

10

5

MMBD1501TPMSCT-ND

PSAS-SPS

CR201

Micro Commercial Co.

180V Rectifier Diode

MMBD1501-TP

2.00

3000

SOT-23

10

5

L71515CT-ND

PSAS-SPS

D201

CML Innovative Technologies Inc

1.9V Orange LED

CMDA5BA7D1S

0.35

3048

0805

1

5

WK6213CT-ND

PSAS-SPS

F200

Wickman USA Inc/Littlefuse Inc

500 mA Fast Acting Fuse

FCD120500TP

0.56

4521

1206

1

5

ZXMP6A17E6CT-ND

PSAS-SPS

Q250

Zetex Inc

P-Channel MOSFET

ZXMP6A17E6TA

1.04

2755

SOT-23-6

1

5

BSS123INCT-ND

PSAS-SPS

Q251

Infineon Technologies

N-Channel Logic-Level MOSFET

BSS123E6327

0.36

4177

SOT-23

1

5

SMBJ18ADICT-ND

PSAS-SPS

TVS200

Diodes Inc

Unidirectional Voltage Suppressor

SMBJ18A-13

0.89

896

SMB

1

20

RHM10.0KCCT-ND

PSAS-SPS

R200,R210,R251,R255

Rohm

10 kohm Resistor

MCR10EZHF1002

0.38

34,300

0805

10

5

RHM17.4KCCT-ND

PSAS-SPS

R201

Rohm

17.4 kohm Resistor

MCR10EZHF1742

0.38

3370

0805

10

5

-

PSAS-SPS

R206

-

-

-

-

-

-

-

5

RHM60.4KCCT-ND

PSAS-SPS

R209

Rohm

60.4 kohm Resistor

MCR10EZHF6042

0.38

960

0805

10

5

RHM649CCT-ND

PSAS-SPS

R214

Rohm

649 ohm Resistor

MCR10EZHF6490

0.38

760

0805

10

5

RHM100KCCT-ND

PSAS-SPS

R215

Rohm

100 kohm Resistor

MCR10EZHF1003

0.38

15560

0805

10

5

RHM61.9KCCT-ND

PSAS-SPS

R250

Rohm

61.9 kohm Resistor

MCR10EZHF6192

0.38

3160

0805

10

5

P.82DCT-ND

PSAS-SPS

R252

Panasonic-ECG

0.82 ohm Resistor

ERJ-6RQFR82V

2.10

4440

0805

10

5

RHM47.0KCCT-ND

PSAS-SPS

R253

Rohm

47.0 kohm Resistor

MCR10EZHF4702

0.38

6840

0805

10

5

RHM18.2KCCT-ND

PSAS-SPS

R254

Rohm

18.2 kohm Resistor

MCR10EZHF1822

0.38

3650

0805

10

Coiltronics BOM

NOTE: The CMS1-11-R (L201,L202) is available from Newark InOne but with a 40 day lead time!

NOTE: Component fields with a "-" mean they are TBD.

Qty

Coiltronics SKU

Cust ID

Part

Mfgr

Description

Mfg Num

Price

Stock

Package

Order Size

5

SD3118-470-R

PSAS-SPS

L200a,L200b

Coiltronics

47 uH Inductor

SD3118-470-R

-

-

Shielded Drum "Bobbin" (SMT)

-

5

CMS1-11-R

PSAS-SPS

L201,L202

Coiltronics

100 uH Inductor

CMS1-11-R

-

-

Torodial (SMT)

-

Total SPS Component Count = 40

SPS LV2b Design Notes

SPSDesignNotes


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