Pulse Power Unit (PPU) for Pulsed Plasma Thrusters (PPT)

Tom Mattick – UW (Dawgstar)[206-543-6181, mattick@aa.washington.edu]

6/25/02

PPU Operation.The pulsed-plasma thruster system operates by charging a ~1.3 µF mica capacitor to ~2.8 kV(energy ~ 5 J). The capacitor is connected across the electrodes of the PPT, with cathode incommon with the cathode a of spark plug mounted in proximity to the electrodes. A HV (~ 2kV) pulse applied to a spark plug initiates a discharge of the capacitor across the face of a teflonbar adjacent to the electrodes, generating thrust. Each PPT assembly has two pairs of electrodesand associated spark plugs, both sides using a common PPT capacitor. A thrust pulse can begenerated on either thruster (not both), depending on which spark plug is pulsed. The PPUfunction is to charge the PPT capacitor(s), and generate a spark on the desired thruster(s) inresponse to logic signals from the I/O board (5-volt logic). The system is powered by thesatellite bus voltage (15-28 V for VT, 24-32 V for UW). Low level auxiliary voltages needed bythe PPU are generated internally.

The PPU uses a flyback switch-mode power supply (SMPS) to simultaneously charge theselected PPT capacitor(s) and discharge initiation (DI) capacitors which provide the energy forthe spark plugs. The DI capacitors (0.68 uF) are internal to the PPU. The SMPS operates atnearly constant power during charging, and is designed to fully charge 2 PPT capacitors inslightly under 1 sec, to allow a firing rate of 1 Hz when two thrusters are fired at each shot(normal UW mode). Since power is nearly constant, it takes slightly less than 0.5 sec to charge asingle PPT capacitor. Logic signals to the PPU select which DI and PPT capacitors to chargeand initiate charging. The thrust discharge itself is initiated within the PPU – the PPU detectswhen the PPT capacitor voltages reaches 2.8 kV, and then fires the selected spark plugs (viaprior selection of DI capacitors charged). The charging process is indicated by the output signal"busy". This line is pulled low (V≤ 1Volt) during charging. The discharge occurs 1 msec afterthe busy line is released. This line is an optocoupled, open-collector transistor, and should havea user-provided 10 kΩ pull-up resistor to the digital positive bus voltage (5V for I/O boardlogic). The user should wait a period td≥ 2 msec following the lo-to-hi transition of the busysignal before initiating the next charge cycle.

Digital control is implemented by 3 lines: "F" (fire), "C" (clock), and "D" (data). They are activeHI, and are optically coupled within the PPU. A digital return line is also required. The timingsequence for input control signals is shown in Fig. 1, and the internal PPU timing for charge andfiring is shown in Fig. 2. The select/charge process is initiated by bringing F high. After a delaytF-C≥ 1 msec, the C and D lines should be clocked in to select which DI and PPT capacitors are tobe charged. The C (clock) line has a number of pulses equaling the number of thrusters (same asnumber of spark plugs) in the system (4 for VT, 8 for UW). The high and low durations of C(tCH and tCL) should be ≥ 20 µsec. Selection of a spark plug (and its associated PPT capacitor) ismade by the state of the D (data) line at the low-to-high transition of a given clock pulse. If D ishi at the leading edge of clock pulse "i", then a corresponding DI capacitor and its associated

PPT capacitor will be charged. The setup time for D (before lo-to-hi of C) should be tsu ≥ 10µsec, and the hold time for D (following lo-to-hi of C) should be thold ≥ 10 µsec. These(relatively long) setup and hold times are to accommodate variability of response times of theoptocouplers onboard the PPU.

Fig. 1 Logic signal timing for PPT selection. Shown for VT to select spark plug 2A.

Fig. 2 Discharge timing internal to PPU.

As provided, the assembled PPU/PPT has the spark-plug lines labeled 1A, 2A, ..., correspondingto thruster assembly 1, 2, ...; implicitly, the unlabelled plugs on each assembly are 1B, 2B, etc.(VT has only 1 and 2, i.e. 2 thruster assemblies). The association of clock (and data) pulses withspark plugs is shown in Tables 1 and 2 below. The order is "reverse" in the sense that, for VT,for example, the last (4th) clock/data pulse is associated with plug 1A, second-to-last (3rd)clock/data pulse is associated with plug 1B, etc. This choice was made to allow the samemethodology of plug selection for VT and UW systems. Important note: do not select twospark plugs on the same thruster (e.g., selection of 2A and 2B is forbidden!). One or two (ondifferent PPT units) plugs may be selected at each shot; if only one is selected the cycle time forthe shot will be ~ 0.5 sec, and if two plugs are selected, the cycle time will be ~ 1 sec.

Table 1: Selection of PPT discharge via D (data) line (for VT)

D line high atclock pulse:

Spark plugselected to fire

PPT capacitorto be charged

1 2B 22 2A 23 1B 14 1A 1

Table 2: Selection of PPT discharge via D (data) line (for UW)

D line high atclock pulse:

Spark plugselected to fire

PPT capacitorto be charged

1 4B 42 4A 43 3B 34 3A 35 2B 26 2A 27 1B 18 1A 1

Fig. 3 Timing for UW PPU to select plugs 1B and 3A

Following the last (4th for VT, 8th for UW) clock pulse, the F line is brought low to initiatecharging (F must remain high during clocking in of C and D pulses). The delay between theHI-to-LO transition of the last C pulse and the hi-to-lo transition of F must be tC-F ≥ 1 msec.This delay time allows the high-voltage selection switches (optocoupled triacs) to stabilize priorto charging. The busy line will go low at the HI-to-LO transition of F, and will remain low untilthe PPT capacitors are fully charged, as noted above. If some fault hangs up the chargingprocess, the PPU will fire the selected plugs at t ≈ 2 sec following the HI-to-LO transition of F(independent of capacitor voltage), in order to allow subsequent charge cycles.

The UW PPU has an option to double the capacitor charging rate, to allow firing thrustersapproximately twice as fast as the nominal firing rate. Using the fast-charge option should allowfiring a single PPT at about 4 Hz, and two PPT's at about 2 Hz. Because the power draw at thismaximum firing rate ( ~25W) cannot be sustained continuously by the power system, this optionis included to provide high thrust for only an orbit or two. Fast charge is implemented bybringing the D line HI at least 20 µsec prior to the HI-to-LO transition of F (after all data hasbeen clocked in), and keeping it HI until the BUSY output line goes HI (capacitors fullycharged). For normal charge rate, the D line should remain LO except when clocking in data.Fast-charge is not implemented on the VT PPU, and the D line should always be LO duringcharging.

The efficiency of the SMPS is ~ 80%, so the input power during charging will be ~ 6.25W perPPU capacitor selected. Firing 2 PPT's per shot at 1 Hz would draw an average power of~12.5W. For the nominal UW bus voltage of 28V, the current draw would be ~ .225 A/capacitorduring charging (~.45A to charge two caps). When inactive, the PPU draws ~ 10 mA.

Temperature Sensors.The PPU/PPT assemblies are fitted with thermistor temperature sensors (negative temperaturecoefficient) for the SMPS transformer and each PPT capacitor (3 thermistors for VT, 5 for UW).The thermistors have a 10 kΩ nominal resistance at 25°C, and are biased (internally to the PPU)as shown in Fig. 4. Resistance and output voltage vs temperature are shown in Fig. 5. Foridentification purposes (PPU pin assignments given later), the thermistors will be called RT

(transformer), R1 (PPT capacitor 1), R2 (PPT capacitor 2), etc. The voltages on the thermistoroutput lines should be checked periodically to insure the transformer and PPT capacitors do notget too hot. The PPT's should not be fired if the transformer temperature exceeds TT,max=120°C,or if the PPT capacitor temperature is out of the range -40°C ≤ TC ≤ 125°C.

Fig. 4. Thermistor biasing. [Measurement of transformer and capacitor temperatures.]

Fig. 5 Thermistor resistance and output voltage vs temperature.

The PPU has a 15-pin input connector for power, logic, and thermistor signals. Externalconnectors are prewired, and provided with the unit. The 4 power lines (2 @ BUS+, 2@ BUS-)are joined with a 4-pin inline (2-piece) connector whose leads are connected to the relay board(PPU must disabled from firing until satellite sufficiently far from shuttle). The remaining 11lines are joined with an 11-pin inline (2-piece) connector whose leads are connected to the I/Oboard. When assembling the inline connectors together, make sure the white dots are on thesame side (both dots visible), since the connectors are not polarized. With this convention forthe dots, the color coding of the wires is shown in Fig. 6.

Cautions/notes:

• Make sure the input signals (logic), output signals (busy and thermistors) and power areconnected to the proper PPU input lines.The PPU can be destroyed if incorrectly connected.

• Do not fire the PPT's in air. This can destroy the PPT capacitors.Note that for air testing, the PPT capacitors were removed from the PPT assembly, anddischarged resistively after full charge with peak discharge current < 1 Amp. The sparkplugs can be fired in air.

• The busy line and thermistor output signals should be bypassed with ~0.1 µF capacitors toanalog ground near the I/O board end. These are relatively high impedance outputs, and the~20 kHz noise of the SMPS and the spark-plug discharge will otherwise result in significantnoise on these lines. [The power lines are filtered, and digital control lines are opto-isolated,so little noise should appear on these.]

• Never select both spark plugs on a single PPT assembly for discharge.

Fig. 6 Input Connections for PPU Unit

PPU Circuitry.The PPU uses three circuit boards:

Filter Board: I/O, timing, SMPS input filter

SMPS Board: HV SMPS supply, HV switching circuitry

DI Board: High current, high-voltage switching of DI plugs.4 DI switches per board.VT uses 1 DI board; UW uses 2 DI boards.

To avoid the weight and volume of high-voltage, high-current connectors, all wiring to PPT's issoldered directly onto PPU boards. A shielded wire bundle is routed to each PPT unit, including2 DI coax lines, the positive charging lead for the PPT capacitor (white HV wire), and a wire pairfor the thermistor. The negative return for the PPT capacitor is the shield of the DI coax lines,since the shells of the DI plugs are in common with the cathode of the PPT (capacitor negative).

A functional diagram of the PPU is shown below. Schematics and parts lists for the boards aregiven on the following pages.

INOUT

GNDC44

0.1uF C4515uF

Pin 11

Pin 12

Pin 13

Pin 14

Pin 15

T1

T5

T4

T3

T2

Pin 8

Pin 9B -

B -

Q34LM2936Z - 5.0

5V

+

R10110K (SIP)

R1021K (SIP)

+ -

TO THERMISTORS

Pin 2

Pin 1

B+

B+

* R983.6 K

R923K

P30 H11A817D

R955.1K

12 12

* R993.6 K

R933K

P31 H11A817D

R965.1K

12 12

* R1003.6 K

R943K

R975.1K

12 12

Pin 5

Pin 6

Pin 4 P32 H11A817D

P33 H11A817DPin 3

CLK

/BUSY

DATA

FIRE

D

C

B -

F

B +

B

TO SMPS BOARD

TO SMPS BOARD

PROPULSION POWER UNITFILTER BOARD -- PAGE 1/2

UNIVERSITY OF WASHINGTON NANOSATELLITEDESIGNED BY DR. A. THOMAS MATTICKGRAPHIC BY HIEU LE AUGUST 20, 2001

UPDATED 5/10/02 (A.T.M.)

1 4

32

3

4

2

1

2

1

3

4

4

32

1

Q312N3906

Q332N3906

Q322N3906

K1(CONNECTOR)

DIG GND

Pin 10

To Page 2

To Page 2

To Page 2

To Page 2

TID100uH

C410.1uF

C4222uF50V

C4322uF50V

C6010uF 50V

12

Q302N4401

D501N4148

D401N5242

12V

T

/T

/RR/C

Q

/Q

VSS

3

86

5

4

7

1

2

GND

R1042M

12

R11110K

R1032M

C461uF

C480.1uF

12 12

T

/T

VCC

/R

R/C

/Q

Q

GND

14

13911

12 10

16

15

+

+

C501nF

/T

T

/RR/C

Q

/Q

GND

14

151012

11 9

13C521nF

R10810K

12 12

/T

T

/RR/C

/Q

Q

VSS

3

87

4

5

6

1

2

GND

VCC

16C5110nF

R107100K

C490.1uF

12 12

R1061K

R105100K

12

R11020K

R1162K

R1152K

FB

/RF

B +

B -

B

12V

G

28V

PROPULSION POWER UNITFILTER BOARD -- PAGE 2/2

UNIVERSITY OF WASHINGTON NANOSATELLITEDESIGNED BY DR. A. THOMAS MATTICKGRAPHIC BY HIEU LE AUGUST 20, 2001

UPDATED 5/10/02 (A.T.M.)

TO SMPS BOARD

(To DI Board 1)

C400.022uF

++

+

TO SMPS BOARD

TO SMPS BOARD

TO SMPS BOARD

TO SMPS BOARD

D511N52981.1mA

D411N4148

E

TO SMPS BOARD

Q35CD4538

Q36CD4538

L1050uH

L1150uH

Q37ZVN3310A

Q38ZVN4424A

R91390

FIRE 2

FIRE 1

GND 1

GND 2

(To DI Board 2)

From Page 1

From Page 1

From Page 1

C471uF

+ +

From Page 1

PPU - Filter Board Components - page 1 of 2

Tom Mattick 3/27/02

Part number Mfg Package Vendor Pkg SlipSemiconductorsD40 12V Zener diode 1N5242B Diodes,Inc DO-35 Digikey DK01-5D41 Signal diode 1N4148 Diodes,Inc DO-35 Digikey DK01-1D42 100V, 1A Rectifier 1N4002 Diodes,Inc DO-41 Digikey DK01-1Q30 NPN Transistor 2N4401 Fairchild TO-92 Digikey DK01-1Q31-33 PNP Transistor 2N3906 ON Semi TO-92 Newark NE01-3Q34 5V Regulator LM2936Z-5.0 NSC TO-92 Digikey DK01-6Q35-36 Dual Multivibrator CD4538BCN Fairchild 16-DIP E-Chips EC01-1Q37 N-Ch Mosfet ZVN3310A Zetex TO-92 Digikey DK01-6Q38 N-Ch Mosfet ZVN4424A Zetex TO-92 Digikey DK01-6P30-32 Optoisolator H11A817D Fairchild 4-DIP Digikey DK01-6

InductorsL10,L11 50uH, 3.3A, 0.04Ω Ind. 73120 Pico Surf mnt Pico PE01-1T10 100uH,3A,0.013Ω CMF 47560 Pico Surf mnt Pico PE01-1

CapacitorsC40 0.047uF,100V,X7R K473K20X7RH5TL2 BC Components axial Digikey DK01-6C41,C44,C48-49 0.1uF,100V,X7R K104K20X7RH5TL2 BC Components axial Digikey DK01-6C42,C43 22uF,50V,tantalum T322F226K050 Kemet axial Mouser ME01-4C45 15uF,16V,tantalum T350E156K016 Kemet radial Mouser ME01-4C46,C47 1uF,35V,tantalum T350A105K035 Kemet radial Mouser ME01-4C50,C52 1nF,100V,X7R K102K15X7RH5TL2 BC Components axial Digikey DK01-6C51 10nF,100V,X7R K103K15X7RH5TL2 BC Components axial Digikey DK01-5C60 10uF,50V,tantalum TAP106M050CRW AVX radial All Amer. Semi AS01-1

PPU - Filter Board Components - page 2 of 2

Part number Mfg Package Vendor Pkg SlipResistorsR90 12K,1/4W,1%,mf 271-12K Xicon axial Mouser ME01-4R91 390Ω,2W,1%,mf 5083NW390R0J12AFX BC Components axial Digikey DK01-8R92-94 3K,1/8W,5%,cf CFR-12JB-3K0 Yageo axial Digikey DK01-6R95-97 4.99K,1/8W,1%,mf 270-4.99K Xicon axial Mouser ME01-2R98-100 3.6K,1/8W,5%,cf CFR-12JB-3K6 Yageo axial Digikey DK01-6R101 10K 5-resistor network 773061103 CTS 6-pin SIP Digikey DK01-6R108,R111 10K,1/8W,1%,mf 270-10K Xicon axial Mouser ME01-1R102 1K 5-resistor network 773061102 CTS 6-pin SIP Digikey DK01-6R106 1K,1/8W,5%,cf CFM-12JB-1K0 Yageo axial Digikey DK01-6R103,R104 2M,1/8W,5%,cf CFM-12JB-2M0 Yageo axial Digikey DK01-6R105,R107 100K,1/8W,1%,mf 270-100K Xicon axial Mouser ME01-2R110 20K,1/8W,1%,mf 270-20k Xicon axial Mouser ME01-2R115,R116 2K,1/8W,5%,cf CFM-12JB-2K0 Yageo axial Digikey DK01-6

OtherK1 15-pin connector ML-263-015-435-22OS Airborn AirbornCircuit Board Polyimide, 4.9"x1.9"x0.064" Prototron Prototron PR01-3

C5

470p

F

R19

10K

R20

909K

R21

10K

+

R23

100K

R14

160K

C10

0.1u

F+

Q14

TLC

393I

P+ -

Q11

ZV

N33

10A

Q12ZVP3310AF

B

VC

CC

S

OU

T

5V

RE

FO

SC

VS

S

C6

1nF

R12

499o

hm

R13

15oh

m

T2

+

Q10

UC

C28

00N

D8

1N41

48

Q13

IRF

S31

N20

D9

P6K

E18

0A18

0V

T1

R17 1K

R24

100M

R22

200K

C9

0.04

7uF

28

D14

1N52

367.

5V

D1

UF

100

7

R18 2K

R1

2K

C1

39uF

C3

0.1u

F

C4

1nF

HV

VD

I

C7

560p F C8

560p

F

PR

OP

ULS

ION

PO

WE

R U

NIT

SM

PS

BO

AR

D -

- P

AG

E 1

/2U

NIV

ER

SIT

Y O

F W

AS

HIN

GT

ON

NA

NO

SA

TE

LLIT

ED

ES

IGN

ED

BY

DR

. A. T

HO

MA

S M

AT

TIC

KG

RA

PH

IC B

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IEU

LE

AU

GU

ST

20, 2

001

UP

DA

TE

D 5

/10/

02 (

A.T

.M.)

FB ECD12V

GN

D

28V

S1B

S2B

S2A

S1A

FROM FILTER BOARD TO DI BOARD 1

+28

/R

FR

OM

FIL

TER

BO

AR

D

R5

100KR2

100K R3

100K R4

100K

R9

100KR6

100K R7

100K R8

100K

S3B S

4B

S4A

S3A

DA

TA

OU

TP

UT

EN

AB

LE

ST

RO

BE

CLO

CK

Q1

Q5

Q6

Q7

Q8

Q4Q3

Q2

VS

S

Q1

CD

4094

BN

TO DI BOARD 2

C2

0.1u

F

+

VC

C

D6

UF

1007

D5

UF

1007

D4

UF

1007

D3

UF

100

7

D2

UF

100

7

R16 2K

D7

UF

1007

Q2

ZV

N44

24A

Q6

ZV

N44

24A

Q7

ZV

N44

24A

Q8

ZV

N44

24A

Q9

ZV

N44

24A

Q5

ZV

N44

24A

Q4

ZV

N44

24A

Q3

ZV

N44

24A

R11

30oh

mR

1049

9ohm

R15

150K

To

Pag

e 2

HV

GN

D

(To DI Boards)

PROPULSION POWER UNITSMPS BOARD -- PAGE 2/2

UNIVERSITY OF WASHINGTON NANOSATELLITEDESIGNED BY DR. A. THOMAS MATTICKGRAPHIC BY HIEU LE AUGUST 20, 2001

UPDATED 5/10/02 (A.T.M.)

HV 28V

D10

GP

02-4

0

P5

MO

C30

83

16 4

2

P4

MO

C30

83

16 4

2

R25

100M

5kV

R36

22M

1.6k

V

R37

22M

1.6k

V

R29

2.7K

2W

S1

CA

P1

1.3u

F M

ICA

P1

MO

C30

83

16 4

2

R33

22M

1.6k

V

P2

MO

C30

83

16 4

2

R34

22M

1.6k

V

P3

MO

C30

83

16 4

2

R35

22M

1.6k

V

D11

GP

02-4

0

P10

MO

C30

83

16 4

2

P9

MO

C30

83

16 4

2

R26

100M

5kV

R41

22M

1.6k

V

R42

22M

1.6k

V

R30

2.7K

2W

S2

CA

P2

1.3u

F M

ICA

P6

MO

C30

83

16 4

2

R38

22M

1.6k

V

P2

MO

C30

83

16 4

2

R39

22M

1.6k

V

P8

MO

C30

83

16 4

2

R40

22M

1.6k

V

TO D

I BO

AR

D 1

D11

2G

P02

-40

P15

MO

C30

83

16 4

2

P14

MO

C30

83

16 4

2

R27

100M

5kV

R46

22M

1.6k

V

R47

22M

1.6k

V

R31

2.7K

2W

S3

CA

P3

1.3u

F M

ICA

P11

MO

C30

83

16 4

2

R43

22M

1.6k

V

P12

MO

C30

83

16 4

2

R44

22M

1.6k

V

P13

MO

C30

83

16 4

2

R45

22M

1.6k

V

D13

GP

02-4

0

P20

MO

C30

83

16 4

2

P19

MO

C30

83

16 4

2

R28

100M

5kV

R51

22M

1.6k

V

R52

22M

1.6k

V

R32

2.7K

2W

S4

CA

P4

1.3u

F M

ICA

P16

MO

C30

83

16 4

2

R48

22M

1.6k

V

P17

MO

C30

83

16 4

2

R49

22M

1.6k

V

P18

MO

C30

83

16 4

2

R50

22M

1.6k

V

HV

GN

D

From Page 1

TO D

I BO

AR

D 1

TO D

I BO

AR

D 2

TO D

I BO

AR

D 2

From Page 1

PPU - SMPS Board Components - page 1 of 2

Tom Mattick 3/27/02

Mfg. part # Mfg. Package Vendor Packing ListSemiconductorsD1-7 1kV,1A,Ultrafast Rectifier UF1007 Diodes,Inc DO-41 Digikey DK01-4D8 Signal diode 1N4148 Diodes,Inc DO-35 Digikey DK01-1D9 170V TVS diode P6KE170A MicroSemi DO-204 Digikey DK01-4D10-13 4kV,1A,rectifier GP02-40 Gen Semi DO-41 All Am Semi AS01-1D14 7.5V Zener diode 1N5236B Diodes,Inc DO-35 Digikey DK01-6Q1 CMOS Ser-to-parallel CD4094BCN Fairchild 16-DIP Echips EC01-1Q2-9 N-Ch Mosfet ZVN4424A Zetex TO-92 Digikey DK01-6Q10 PWM UCC2800N TI 8-DIP Arrow AR01-2Q11 N-Ch Mosfet ZVN3310A Zetex TO-92 Digikey DK01-6Q12 P-Ch Mosfet ZVP3310A Zetex TO-92 Digikey DK01-6Q13 200V,31A,N-Ch Mosfet IRFS31N20D IRF D2PAK Newark NE01-2Q14 Comparator TLC393IP TI 8-DIP Arrow AR01-2P1-20 800V opto-triac MOC-3083 Fairchild 6-DIP Digikey DK01-6

TransformersT1 E-core E30/15/7 Philips Allstar Magn AM01-1

Bobbin CSH-E20/7-1S-10P Philips Allstar Magn AM01-1Clip CLA-E20/15/7 Philips Allstar Magn AM01-120AWG H Magnet wire 20HAPT Wiretronics Wiretronics WT00-132AWG H Magnet wire 32HAPT Wiretronics Wiretronics WT00-1Interwinding tape 1N012 Lodestone Lodestone LP01-1

T2 Cur. Sense xfmr,1:100 PE68280 Pulse Engg. Surf mnt Arrow AR00-1

PPU - SMPS Board Components - page 2 of 2

Mfg. part # Mfg. Package Vendor Packing ListResistorsR1,R16,R18 2k,2W,5%,mf 5083NW2K000J12AFX BC Components axial Digikey DK01-6R2-9,R23 100k,1/8W,1%,mf 270-100K Xicon axial Mouser ME01-2R10,R12 499Ω,1/8W,1%,mf 270-499 Xicon axial Mouser ME01-1R11 30Ω,1/8W,1%,mf 270-30R0 Xicon axial Mouser ME01-4R13 15Ω,1/8W,5%,cf CFR-12JB-15R Yageo axial Digikey DK01-6R14,R15 150k,1/8W,1%,mf 270-150K Xicon axial Mouser ME01-1R17 1k,2W,5%,mf 5083NW1K000J12AFX BC Components axial Digikey DK01-6R19,R21 10k,1/8W,1%,mf 270-10K Xicon axial Mouser ME01-1R20 909k,1/8W,1%,mf 270-909K Xicon axial Mouser ME01-1R22 178k,1/8W,1%,mf 270-178K Xicon axial Mouser ME01-4R24-28 100M,1W,5kV MOX750F-100M Ohmite axial Digikey DK01-4R29-32 3k,2W,5%,mf 5083NW3K000J12AFX BC Components axial Digikey DK01-6R33-52 22M,1/4W,1.5kV 5043DM22M00J BC Components axial Allied AL00-1

CapacitorsC1 39uF,50V,ceramic 87106-D39 JDI 20-DIP [Provided by Genl Dynamics]C2-3,C9 0.1uF,100V,X7R K104K20X7RH5TL2 BC Components axial Digikey DK01-6C5 470pF,100V,5%,COG K471J15COGH5TL2 BC Components axial Digikey DK01-6C4,C6 1nF,100V,X7R K102K15X7RH5TL2 BC Components axial Digikey DK01-6C7-8 560pf,6kV,ceramic 140-CD602P9-561K Xicon radial Mouser ME01-4

OtherCircuit Board Polyimide, 6"x4"x0.064" Prototron Prototron PR01-2

C2210nF

R7320K

T41:2.24

D301N4148

D311N4148

L115uH

D261N5250

20VC30

4.7nF

Q22IRG4PH50UD

R8122M

C26.68uF

P21 MOC3083

1 6

42

R6522M

R6622M

1 6

42

C2310nF

R7420K

T51:2.24

D321N4148

D331N4148

L215uH

D271N5250

20VC31

4.7nF

Q23IRG4PH50UD

R8222M

C27.68uF

P23 MOC3083

1 6

42

R6722M

R6822M

1 6

42

P24 MOC3083P22 MOC3083

C201uF

R625K

R635K

C2110nF

D201N5242 (12V)

FireQ20

2N3906

R641K

Q21IRFD120

R773.3

R783.3

S1A S1

D22R2000F

D23R2000F

VDI S1BHV GND

COAX TOD1A

COAX TOD1B

VDI

HV GND

( To Page 2)

Fire HI

Fire LO

( To Page 2)

R60100K

GND

+28V

Fro

m F

ilter

Boa

rdFrom SMPS Board

PROPULSION POWER UNITDI BOARD - Page 1/2

UNIVERSITY OF WASHINGTON NANOSATA.T. MATTICK 5/10/02

C2410nF

R7520K

T61:2.24

D341N4148

D351N4148

L315uH

D281N5250

20VC32

4.7nF

Q24IRG4PH50UD

R8322M

C28.68uF

P25 MOC3083

1 6

42

R6922M

R7022M

1 6

42

C2510nF

R7620K

T71:2.24

D361N4148

D371N4148

L415uH

D291N5250

20VC33

4.7nF

Q25IRG4PH50UD

R8422M

C29.68uF

P27 MOC3083

1 6

42

R7122M

R7222M

1 6

42

P28 MOC3083P26 MOC3083

R793.3

R803.3

S2A S2

D24R2000F

D25R2000F

S2B

COAX TOD2A

COAX TOD2B

VDI

HV GND

( From Page 1)

From SMPS Board

Fire HI

Fire LO

( From Page 1)

PROPULSION POWER UNITDI BOARD - Page 2/2

UNIVERSITY OF WASHINGTON NANOSATA.T. MATTICK 5/10/02

PPU - DI Board Components - page 1 of 2

Tom Mattick 3/27/02

Mfg. Part # Mfg. Package Vendor Packing ListSemiconductorsD20 12V Zener diode 1N5242B Diodes,Inc DO-35 Digikey DK01-5D22-D25 2kV rectifier diode R2000F Rectron DO-41 Mouser ME01-3D26-D29 20V zener diode 1N5250B Gen. Semi. DO-35 Mouser ME01-3D30-D37 Signal diode 1N4148 Diodes,Inc DO-35 Digikey DK01-1Q20 PNP Transistor 2N3906 ON Semi TO-92 Newark NE01-3Q21 N-Ch Mosfet IRFD120 IRF 4-DIP Digikey DK01-5Q22-Q25 1.2 kV IGBT IRG4PH50UD IRF TO-247 Allied AL00-2P21-P28 800-V opto-SCR MOC3083 Fairchild 6-DIP Digikey DK01-6

InductorsT4-T7 1:2.24, 4kV gate xfmr 78253-35V CD Tech 6-DIP Mouser ME01-3L1-L4 15uH Iron-core Ind. 434-10-150M Xicon/Fastron axial Mouser ME01-3

ResistorsR60 100k,1/8W,1%,mf 270-100K Xicon axial Mouser ME01-2R61-63 4.99k,1/8W,1%,mf 270-4.99K Xicon axial Mouser ME01-2R64 1k,1/8W,1%,mf 270-1K Xicon axial Mouser ME01-1R65-72,R81-84 22M,1/4W,1.5kV 5043DM22M00J BC Components axial Allied AL00-1R73-76 20K,1/8W,1%,mf 270-20k Xicon axial Mouser ME01-2R77-80 3.3Ω,1/8W,5%,cf CFR-12JB-3R3 Yageo axial Digikey DK01-5

PPU - DI Board Components - page 2 of 2

Mfg. Part # Mfg. Package Vendor Packing ListCapacitorsC20 1uF,50V,mf ECQ-V1H105JL Panasonic radial Digikey DK01-5C21 10nF,100V,X7R K103K15X7RH5TL2 BC Components axial Digikey DK01-5C22-25 10nf, 3kV,ceramic 30GASS10 Ceramite radial Allied AL01-2C26-29 0.68uF, 1kV, X7R SV08AC684K AVX radial Kent KE01-1C30-C33 4.7nF,100V,X7R K472K20X7RH5TL2 BC Components axial Digikey DK01-5

OtherCircuit Board Polyimide, 6"x4"x0.064" Prototron Prototron PR01-1