RO

Application Note 19 Rev B, June 23, 1998

RO Associates, Inc.

Hole Dimensions And Socket Information General Description Proper location and sizing of PWB holes and sockets is important to realize the full reliability and performance of RO’s modules. Correct mounting techniques will prevent problems due to strained module leads or reduced thermal coupling between the module and the heat sink. This application note provides the recommended hole locations and sizes for several popular mounting configurations, as well as a compilation of electrical and mechanical data for the sockets that RO offers as accessories. PWB fabrication drawings for any of the RO mounting boards or evaluation boards are also available. Please contact the RO factory or your local RO sales representative for further information. Footprint Drawings µV28-xx and µV48-xx single output modules.......... 4 µV300-xx single output modules ............................. 5 µV28-Txxx and µV48-Txxx triple output modules.. 5 µV300-Txxx triple output modules.......................... 6 PFC modules ........................................................... 6 nV48-xx modules ..................................................... 7 nV300-xx modules ................................................... 7 pV modules .............................................................. 7 HH1199-6 EMI Filter .............................................. 8 µV28-xx or µV48-xx single with sockets ................. 8 µV28-xx or µV48-xx triple with sockets .................. 9 PFC module with sockets. ....................................... 9 nV48-xx module with sockets................................ 10 nV300-xx module with sockets.............................. 10 pV module with sockets......................................... 10 HH1199-6 EMI Filter with sockets. ...................... 11

Implementation Standard Mounting In the standard mounting method the module is sandwiched by the PWB and the heat sink. The

mounting screws pass through the PWB and the module, and are threaded into the heat sink. This method of mounting is shown in Figure 19a. The standoffs are required because without them, the screw force on the PWB material will cause it to cold flow into the counter bore of the module mounting hole. The result will be a loss of tension on the screw resulting in poor thermal coupling between the module and the heat sink. A swaged standoff is preferred because it passes through the PWB and contacts the screw head. This completely removes the compressive force of the screw from the PWB. All of the module footprints shown in this application note assume the use of RO’s standoffs to support the PWB. See AP-22 for further information on the standoffs. In the standard mounting method, the pins of the module are directly soldered into the PWB. This is the best possible scenario for performance, reliabilThreaded Heat Sink

Module

Standoff

PWB Figure 19a RO Standard Module Mounting

ity, and cost. A high quality solder joint has a much lower resistance than a socket and can actually help to cool the module. Soldering should be done via an automated process such as wave soldering. Hand soldering may expose the module to high temperatures that can damage components located at the base of the large pins and is therefore not recommended. Figure 19b through Figure 19j show the standard footprints for RO modules.

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AP-19B

Hole Dimensions and Socket Information

Recessed Mounting It is possible to lower the effective height of the nANOVERTER® modules to a mere 0.33” by recessing the module into the PWB. Figure 19q shows the recommended cut-out for the PWB. Care must be exercised to prevent the leads of the module from being strained. If a heat sink is to be used with the module, brackets should be used to support the weight of the module-heat sink combination. Socketed Mounting There are some instances when soldering the modules to the PWB is not practical and sockets are desired or required. RO, in fact, recommends that prototype and first run power supplies use sockets on the modules to ease problem resolution and system optimization efforts. The trade-off in using sockets is practicality (ease of manufacture, repair, and trouble-shooting) versus cost and performance (efficiency, reliability, and noise). The two main parameters that affect socket cost are contact resistance and insertion force. In general, socket cost increases as insertion force and contact resistance decrease. The following descriptions are intended as a guide to selecting the most cost effective set of sockets for your application. Table 19a and Table 19b list the socket sets used by RO in our evaluation boards and mounting boards. These sockets were chosen for the best module performance. The quantities shown assume that all pins are used. Some examples of socketed footprints are shown in Figure 19k through Figure 19r

MICROVERTER® pins Table 19a Standard socket quantities and ® types used for MICROVERTER and UNIVERTER modules

RO Socket # Pin Size Module Series

9871 0.040 Dia.

9890 0.040 Dia.

µV28 Singles µV48 Singles µV300 Singles µV28 Triples µV48 Triples µV300 Triples PFC Series

8 8 6 13 13 11 7

1 1 1

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9894 0.098 Dia.

9872 0.138 Dia. 2 2 2

2 2 2

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± Input pins - For the 28V and 48V series modules use the 0.040 Hypertronics socket (RO#9871) to handle the full input current. The 300V series can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out. For paralleling applications, always use the Hypertronics socket for the -IN pin(s) to ensure good current sharing accuracy. Parallel/ On/ Off pin - Either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890) can be used on the Parallel/ On/ Off pin. For paralleling applications the Hypertronics socket will provide slightly better current sharing accuracy and lower noise. On applications that do not use the Parallel/ On/ Off pin the socket can be left out to reduce cost and insertion force. Be sure to either use a non-plated-through hole or mask the hole prior to wave solder to prevent it from filling up with solder. Output pins (singles) - Use the 0.138 Hypertronics socket (RO#9872) to handle the full output current. The PWB pads will have to be shaped in order to avoid an interference with adjacent pads. RO has successfully used a rectangular pad for this purpose. Output pins (triples) - Use the 0.098 Hypertronics socket (RO#9894) to handle the full output current. The PWB pads will have to be shaped in order to avoid an interference with adjacent pads. RO has successfully used a rectangular pad for this purpose. Sense pins - The -SENSE pin can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). On triple output models, the +SENSE pin can also use either socket. However, on the single output models there will be an interference between the +OUT socket and the +SENSE socket if both use the Hypertronics sockets available from RO. RO therefore recommends the 0.040 Cambion socket for the +SENSE pin on single output modules. TRIM pin - The TRIM pin is a low current connection and therefore can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Hypertronics socket will provide slightly better trimming accuracy and lower noise. On applications that don’t use the TRIM pin the socket can be left out to reduce cost

RO Associates, Inc. • 246 Caspian Dr. • Sunnyvale, CA 94089 • (408) 744-1450

AP-19B

Hole Dimensions and Socket Information

and insertion force. Be sure to use either a nonplated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. Output Good pin - The Output Good (OG) pin is a low current, low accuracy connection and therefore can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). On applications that don’t use the OG pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder.

UNIVERTER pins AC Input pins - The PFC series input pins can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out. The Hypertronics socket will tend to run cooler because of the lower contact resistance. ±Vout pins - The output pins of the PFC series have relatively low current because of the high output voltage. They therefore can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out. Vaux pin - The Vaux pin is a low current voltage source and is not sensitive to noise. Therefore it can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). On applications that don’t use the DC OK pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. DC OK pin - The DC OK pin is a low current, low accuracy connection and therefore can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). On applications that don’t use the DC OK pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. LD ENA pin - The LD ENA pin is a low current, low accuracy connection and therefore can use either the 0.040 Hypertronics socket (RO#9871) or

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the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out.

nANOVERTER® pins RO only offers one socket for the 0.025” square pins (RO# 9741). There are, however, many sockets available on the market for this particular pin size. Carefully analyze the insertion/ extraction force and contact resistance of candidate sockets before selecting a substitute. Table 19b Standard socket quantities and types used for nANOVERTER® and pICOVERTER® modules.

RO Socket # Pin Size Module Series

9741 0.025 SQ.

nV48 Series nV300 Series pV48 Series pV300 Series

6 6

9871 0.040 Dia.

9740 0.060 Dia.

2 6 6

9748 0.081 Dia.

6 4 2 2

±SENSE pins - Use the RO# 9741 socket. For paralleling applications, always use a low contact resistance socket for the -SENSE pin to ensure good current sharing accuracy. They will provide better current sharing accuracy and lower noise. TRIM pin - Use the RO# 9741 socket. On applications that don’t use the TRIM pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. ON/ OFF pin - Use the RO# 9741 socket. On applications that don’t use the ON/OFF pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. PARALLEL pin - Use the RO# 9741 socket. On applications that don’t use the PARALLEL pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. PV pin - Use the RO# 9741 socket. On applications that don’t use the PV pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole

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AP-19B

Hole Dimensions and Socket Information

prior to wave solder to prevent it from filling up with solder. ±OUT pins - Use the RO# 9740 0.060 socket. ±IN pins - Use the RO# 9740 0.060 socket for the 48V input models. The 300V series can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out.

pICOVERTER® pins Sense pins - The sense pins can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). Trim pin - The trim pin is a low current connection and therefore can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Hypertronics socket will provide slightly better trimming accuracy and lower noise. On applications that don’t use the trim pin the

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socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. ON/ OFF pin - The ON/OFF pin can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). On applications that don’t use the ON/OFF pin the socket can be left out to reduce cost and insertion force. Be sure to use either a non-plated through hole or mask the hole prior to wave solder to prevent it from filling up with solder. ±OUT pins - Use the RO# 9740 0.060 socket. ±IN pins - The input pins can use either the 0.040 Hypertronics socket (RO#9871) or the 0.040 Cambion socket (RO#9890). The Cambion socket will help to reduce cost at the expense of insertion force and the number of insertion cycles before the socket wears out.

Standard Footprint Drawings MICROVERTER® Singles 3.60 Hole size tolerance is ± 0.005 3.20 0.20 0.20 0.25 0.12

0.15 0.15 0.20

0.15 0.15

2.40 0.12

0.50

2.00 1.10

0.194 DIA. Hole. Install RO# 9878 standoff nearside 0.160 DIA. Hole. 0.08

0.060 DIA. Hole. 3.30

Figure 19b Recommended footprint for µV28-xx and µV48-xx single output modules. View is from the module side of the PWB.

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RO Associates, Inc. • 246 Caspian Dr. • Sunnyvale, CA 94089 • (408) 744-1450

AP-19B

Hole Dimensions and Socket Information

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3.60 3.20

Hole size tolerance is ± 0.005

0.20 0.20 0.25 0.15 0.15 0.20

0.27 2.40

0.15

0.50

2.00 1.22

0.194 DIA. Hole. Install RO# 9878 standoff nearside 0.160 DIA. Hole. 0.08

0.060 DIA. Hole. 3.30

Figure 19c Recommended footprint for µV300-xx single output modules. View is from the module side of the PWB.

MICROVERTER® Triples 4.60 4.20

Hole size tolerance is ± 0.005

0.20 0.20 0.20 0.12 2.40

0.15 0.20

0.15 0.15

0.25

0.12

0.25 0.15 0.15 0.15

2.00 1.10

0.194 DIA. Hole. Install RO# 9878 standoff nearside 0.08

0.120 DIA. Hole. 4.30

0.060 DIA. Hole.

Figure 19d Recommended footprint for µV28-Txxx and µV48-Txxx triple output modules. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

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4.60 Hole size tolerance is ± 0.005

4.20 0.20 0.20 0.20

0.15 0.20

0.27 2.40

0.15

0.25 0.25

2.00

0.15 0.15 0.15

1.22

0.194 DIA. Hole. Install RO# 9878 standoff nearside 0.08

0.120 DIA. Hole. 4.30

0.060 DIA. Hole.

Figure 19e Recommended footprint for µV300-Txxx triple output modules. View is from the module side of the PWB.

PFC Standard Footprints

4.60 Hole size tolerance is ± 0.005

4.20 0.20 0.20

0.15 0.20 0.27 2.40 0.70 2.00 1.37

0.194 DIA. Hole. Install RO# 9878 standoff nearside

0.08 4.30

0.060 DIA. Hole.

Figure 19f Recommended footprint for PFC modules. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

06-23-98

nV Standard Footprints 2.30 0.17

0.17

2.30 0.10 5 places

1.96

0.17

0.17

Hole size tolerance is ± 0.005

0.10 5 places

1.96

Hole size tolerance is ± 0.005

0.85 2.40

0.85 2.40

2.06

2.06

1.00

1.00

0.15 3 places

0.04

0.15 3 places

0.04

2.05

2.04

0.153 DIA. Hole. Install RO# 9528 standoff nearside

0.081 DIA. Hole

0.040 DIA. Hole

Figure 19g Recommended footprint for nV48-xx modules. View is from the module side of the PWB.

0.153 DIA. Hole. Install RO# 9528 standoff nearside

0.081 DIA. Hole

0.060 DIA. Hole

0.040 DIA. Hole

Figure 19h Recommended footprint for nV300-xx modules. View is from the module side of the PWB.

pV Standard Footprints 2.30 1.96 0.17

0.33 0.17 0.40 2.40

0.30

2.06 Hole size tolerance is ± 0.005

0.30 0.40

0.03 1.90 0.153 DIA. Hole. Install RO# 9528 standoff nearside

0.100 DIA. Hole

0.060 DIA. Hole

Figure 19i Recommended footprint for all pV modules. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

06-23-98

EMI Filter Standard Footprints

4.60 Hole size tolerance is ± 0.005

4.20 0.20 0.20

1.00 0.40

2.40

0.40 2.00

0.125 DIA. Hole. 0.100 DIA. Hole.

Figure 19j Recommended footprint for HH1199-6 EMI Filter. View is from the filter side of the PWB.

Socketed Footprint Drawings µV Singles Socketed Footprints 3.60 3.20 0.20 0.20 0.25 0.12 2.40

0.15 0.15

0.15 0.15

0.20

0.12 2.00

0.50 1.10

0.265 ± 0.002 DIA. Hole. Install RO# 9872 socket nearside 0.194 ± 0.005 DIA. Hole. Install RO# 9878 standoff nearside 0.110 ± 0.002 DIA. Hole. Install RO# 9871 socket nearside

0.08 3.30

0.076 +0.002, -0.001 DIA. Hole. Install RO# 9890 socket nearside

Figure 19k An example of a µV28-xx or µV48-xx single output module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

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µV Triples Socketed Footprints 4.60 4.20 0.20 0.20 0.20 0.12

0.15 0.20

0.15 0.15

2.40 0.12

0.25

2.00

0.25 0.15 0.15 0.15

1.10

0.221 ± 0.002 DIA. Hole. Install RO# 9894 socket nearside. 0.194 ± 0.005 DIA. Hole. Install RO# 9878 standoff nearside.

0.08 4.30

0.110 ± 0.002 DIA. Hole. Install RO# 9871 socket nearside.

Figure 19l An example of a µV28-xx or µV48-xx triple output module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB

PFC Socketed Footprints 4.60 4.20 0.20 0.20 0.15 0.20 0.27

2.40

0.70 2.00 1.37

0.221 ± 0.002 DIA. Hole. Install RO# 9894 socket nearside. 0.08 4.30

0.194 ± 0.005 DIA. Hole. Install RO# 9878 standoff nearside. 0.110 ± 0.002 DIA. Hole. Install RO# 9871 socket nearside.

Figure 19m An example of a PFC module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

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nV Socketed Footprints 2.30 0.17

2.30 0.17

0.10 5 places

1.96

0.17

0.10 5 places

1.96

0.17 Hole size tolerance is ± 0.002

Hole size tolerance is ± 0.002

0.85

2.40

2.06

0.85

2.40

2.06

1.00

1.00

0.15 3 places

0.04

0.04

2.05

0.15 3 places

2.04

0.153 ±0.005 DIA. Hole. Install RO# 9528 standoff nearside

0.105 DIA. Hole. Install RO# 9740 socket nearside

0.064 DIA. Hole. Install RO# 9741 socket nearside

Figure 19n An example of a nV48-xx module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB.

0.153 ±0.005 DIA. Hole. Install RO# 9528 standoff nearside

0.105 DIA. Hole. Install RO# 9740 socket nearside

0.110 DIA. Hole. Install RO# 9871 socket nearside

0.064 DIA. Hole. Install RO# 9741 socket nearside

Figure 19o An example of a nV300-xx module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB.

nV Cut-out for Recessed Mounting

pV Socketed Footprint

2.35

2.30 1.96

0.21

0.17

0.06

0.07 0.33

0.37

0.17

REMOVE MATERIAL FOR RECESSED MOUNTING

0.40 2.40

0.30

2.06 Hole size tolerance is ± 0.002

0.30

1.28

0.40

0.03 1.90 0.153 ± 0.005 DIA. Hole. Install RO# 9528 standoff nearside

0.37 0.37

0.122 DIA. Hole. Install RO# 9748 socket nearside

0.03R MAX 8 PLACES

0.110 DIA. Hole. Install RO# 9871 socket nearside

Figure 19p An example of a pV module footprint with sockets. Other socket configurations are possible. View is from the module side of the PWB.

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0.02R 4 PLACES

Figure 19q Suggested cut-out for recessed mounting of the nV series modules. View is from the module side of the PWB.

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AP-19B

Hole Dimensions and Socket Information

06-23-98

EMI Filter Socketed Footprints 4.60 Hole size tolerance is ± 0.005

4.20 0.20 0.20

1.00 0.40

2.40

0.40 2.00 0.125 DIA. Hole. Install spacer nearside 0.122 ± 0.002 DIA. Hole. Install RO#9748 socket nearside

Figure 19r An example of a HH-1199-6 EMI Filter with sockets. Other socket configurations are possible. View is from the module side of the PWB. Note: A small spacer (>0.030 thick) is required at each corner between the filter body and the PWB to prevent the filter from contacting the sockets.

Socket Data The following is a compilation of electrical and mechanical data for the sockets offered by RO. RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Insert/ Extract Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

9741 Socket, 0.025 SQ. PIN Amp 50864-1 < 15 mΩ min 0.5 oz., max 56 oz. 0.244 in min. 0.065 ±0.002 copper (body), Beryllium copper (spring) electro-tin (body), gold (spring)

RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Extraction Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

0.018

0.257

9890 Socket, 0.040 DIA. PIN Cambion 450-3716-01-06-00 1.0 mΩ min 6 oz., max 20 oz. 0.190 in min. 0.076 +0.002, -0.001 in copper (body), Beryllium copper (spring) electro-tin (body), gold over copper (spring) 0.190

0.013

0.014

0.061DIA ±0.002

0.080DIA ±0.002

OPEN END

Tol ±0.005

Figure 19s RO Socket 9741 Mechanical Dimensions

0.046DIA 0.073DIA ±0.002

0.090DIA

OPEN END

Tol ±0.005

Figure 19t RO Socket 9890 Mechanical Dimensions

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AP-19B

Hole Dimensions and Socket Information

RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Extraction Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

9871 Socket, 0.040 DIA. PIN Hypertronics YSK0102-004 AH < 2.5 mΩ min 1 oz., max 3.9 oz. 0.240 in min. 0.110 ±0.002 in brass (body), Beryllium copper (wires) gold over nickel (body), gold over nickel (wires)

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RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Extraction Force: Internal Hole Depth: PCB Hole Size: Materials:

9748 Socket, 0.080 DIA. PIN Mill-Max 0394-0-15-01-07-27-10-0 ??? typ 7 oz. 0.352 in min. 0.122 ±0.002 brass #360, 1/2H (body), Beryllium copper (spring) tin over nickel (body), gold over nickel (spring)

Plating:

0.284

0.025

0.031

0.400

0.143DIA ±0.002 0.121 DIA.

0.108 DIA.

OPEN END

Tol ±0.002

Figure 19u RO Socket 9871 Mechanical Dimensions

RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Insert/ Extract Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

9740 Socket, 0.060 DIA. PIN Amp 2-50871-2 (or -6) < 15 mΩ min0.5 oz., max 56 oz. 0.275 in min. 0.105 ±0.002 copper (body), Beryllium copper (spring) tin, or gold flash(body), tin, or gold (spring)

0.118DIA ±0.002

OPEN END

Tol ±0.005

Figure 19w RO Socket 9748 Mechanical Dimensions

RO Part # Description: Manufacturer: Manuf. Part # Contact Resistance: Extraction Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

9894 Socket, 0.098 DIA. PIN Hypertronics Identical to YSK025-002AH except for shoulder < 0.8 mΩ min 6 oz., max 25 oz. 0.319 in min. 0.221 ±0.005 in brass (body), Beryllium copper (wires) gold over nickel (body), gold over nickel (wires)

0.411

0.288

0.055

0.031

0.014

0.101DIA ±0.002

0.118DIA ±0.002

OPEN END

Tol ±0.005

Figure 19v RO Socket 9740 Mechanical Dimensions

19-12

0.157 DIA.

0.230 DIA. 0.046

OPEN END

0.046

0.217 DIA.

Tol ±0.001

Figure 19x RO Socket 9894 Mechanical Dimensions

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AP-19B

Hole Dimensions and Socket Information

RO Part # Description: Manufacturer: Manuf. Part #

9872 Socket, 0.138 DIA. PIN Hypertronics Identical to MG138F31A except for shoulder < 0.5 mΩ min 7 oz., max 32 oz. 0.319 in min. 0.265 ±0.002 in brass (body), Beryllium copper (wires) gold over nickel (body), gold over nickel (wires)

Contact Resistance: Extraction Force: Internal Hole Depth: PCB Hole Size: Materials: Plating:

0.352

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the problem resolution and optimization efforts and could significantly reduce the debug cycle times. Configurable Power Supplies - Inventory can be reduced by designing common boards that can be configured by inserting a module with the desired output voltage in the appropriate socketed location. Difficult Production Situations - Sockets can be used in situations where the modules can not withstand the manufacturing process, or in situations where the assembly process is hampered by the presence of the modules. For example, in low quantity production/ prototype applications sockets can be hand soldered into the PCB when the use of a wave solder process is not warranted.

0.031

Precautions 0.272 DIA.

0.260 DIA.

OPEN END

Tol ±0.001

Figure 19y RO Socket #9872 Mechanical Dimensions

Possible Applications PWB Based Power Supplies - The footprint information contained in this note along with the information in AP-18 Board Layout Considerations and Recommendations will speed the layout process on any application that requires a module to be mounted in a PWB.

Mechanical Interference - The +OUT and +SENSE pins of the single output modules will interfere with one another when both are using large diameter sockets. Thermal Performance - Using sockets that are not rated for the applied current levels will generate excessive heat and may reduce the reliability of the module.

Related Topics AP-2

Mechanical Mounting Considerations

AP-18 Board Layout Considerations and Recommendations AP-22 Accessories

Prototype Designs - The prototype and first run production power supplies should be built using sockets to mount the modules. This will facilitate

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AP-19B

Hole Dimensions and Socket Information

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