Surface mount power supply package and method of manufacture thereof

• US 5,959,842 A
• Filed: 05/14/1998
• Issued: 09/28/1999
• Est. Priority Date: 05/14/1998
• Status: Expired due to Fees

• Current Assignee: Tyco Electronics Logistics AG (TE Connectivity Limited)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Leonard, Scott E., Shih, Yi Teh, Woods, William L. Jr.
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): Vigushin, John B.
• Application Number:
  US09/078,791
• Time in Patent Office: 502 Days
• Field of Search: 361/601, 361/622, 361/623-625, 361/679, 361/683, 361/728, 361/736, 361/740, 361/746, 361/747, 361/752, 361/757, 361/759, 361/760, 361/767, 361/771, 361/782, 361/783 , 361/807, 361/809, 361/812, 361/813, 361/829, 361/836, 174/50.51, 174/52.1, 174/52.2, 174/260, 29/827, 29/831, 29/841, 307/64-66, 307/147, 264/272.11
• US Class Current: 361/752
• CPC Class Codes: H05K 1/141 One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters H05K1/142 and H05K1/147 take precedence
• CPC Class Codes: H05K 2201/1003 Non-printed inductor
• CPC Class Codes: H05K 2201/10166 Transistor
• CPC Class Codes: H05K 2201/10424 Frame holders
• CPC Class Codes: H05K 2203/082 Suction, e.g. for holding solder balls or components
• CPC Class Codes: H05K 3/303 Surface mounted components, e.g. affixing before soldering, aligning means, spacing means H05K3/32 takes precedence
• CPC Class Codes: H05K 3/3421 Leaded components
• CPC Class Codes: H05K 3/3447 Lead-in-hole components H05K3/3415 takes precedence
• CPC Class Codes: H05K 3/368 parallel to each other H05K3/361 takes precedence
• CPC Class Codes: H05K 7/1092 with built-in components, e.g. intelligent sockets

Abstract

A surface mount package for containing a board-mounted power supply, a method of manufacturing the same and a board-mounted power supply employing the package. In one embodiment, the package includes: (1) a plurality of leads having first ends and second, surface mount ends, (2) a dielectric lead frame that retains the plurality of leads in predetermined positions relative to one another such that at least some of the second, surface mount ends are co-planar, the first ends couplable to the board-mounted power supply, (3) a shell, coupled to the lead frame, that forms a portion of a periphery of the surface mount package and (4) potting material located between the lead frame and the shell.

Claims

1. A surface mount package for containing a board-mounted power supply, comprising:

a plurality of leads having first ends and second, surface mount ends;

a dielectric lead frame that retains said plurality of leads in predetermined positions relative to one another such that at least some of said second, surface mount ends are co-planar, said first ends couplable to said board-mounted power supply;

a shell, coupled to said lead frame, that forms a portion of a periphery of said surface mount package; and

potting material located between said lead frame and said shell and adapted to resist movement of said board-mounted power supply within said surface-mount package.

2. The package as recited in claim 1 wherein said first ends are through-hole mount ends adapted to pass through corresponding vias in said board-mounted power supply.

3. The package as recited in claim 1 wherein said lead frame has a potting port that allows said potting material to be introduced between said lead frame and said shell.

4. The package as recited in claim 1 wherein said lead frame has a retention clip that engages and mechanically retains said board-mounted power supply in contact with said first ends.

5. The package as recited in claim 1 wherein said board-mounted power supply has a magnetic core associated therewith, said package further comprising a compliant material, proximate said magnetic core, that absorbs compressive forces generated in said potting material.

6. The package as recited in claim 1 wherein said shell has a retention clip that engages and mechanically retains said lead frame in contact with said shell.

7. The package as recited in claim 1 wherein said lead frame and said shell are composed of plastic.

8. A method of manufacturing a surface mount package for containing a board-mounted power supply, comprising the steps of:

forming a plurality of leads having first ends and second, surface mount ends;

retaining, with a dielectric lead frame, said plurality of leads in predetermined positions relative to one another such that at least some of said second, surface mount ends are co-planar, said first ends couplable to said board-mounted power supply;

coupling a shell to said lead frame, said shell forming a portion of a periphery of said surface mount package; and

introducing potting material between said lead frame and said shell, said potting material adapted to resist movement of said board-mounted power supply within said surface-mount package.

9. The method as recited in claim 8 wherein said first ends are through-hole mount ends adapted to pass through corresponding vias in said board-mounted power supply.

10. The method as recited in claim 8 wherein said step of introducing comprises the step of introducing said potting material through a potting port in said lead frame.

11. The method as recited in claim 8 wherein said lead frame has a retention clip, said method further comprising the step of engaging and mechanically retaining a board-mounted power supply in contact with said first ends.

12. The method as recited in claim 8 wherein said board-mounted power supply has a magnetic core associated therewith, said method further comprising the step of placing a compliant material proximate said magnetic core, said compliant material adapted to absorb compressive forces generated in said potting material.

13. The method as recited in claim 8 wherein said shell has a retention clip, said step of coupling comprising the step of engaging and mechanically retaining said lead frame in contact with said shell with said retention clip.

14. The method as recited in claim 8 wherein said lead frame and said shell are composed of plastic and wherein said lead frame comprises a removable pick-and-place bridge.

15. A surface mount packaged power supply, comprising:

a plurality of leads having first ends and second, surface mount ends;

a dielectric lead frame that retains said plurality of leads in predetermined positions relative to one another such that at least some of said second, surface mount ends are co-planar;

a power supply having a magnetic core associated therewith and conductors coupled to at least some of said first ends;

a shell, coupled to said lead frame, that forms a portion of a periphery of said surface mount package; and

potting material, located between said lead frame and said shell and at least partially surrounding said power supply, that resists movement of said power supply within said surface-mount package.

16. The power supply as recited in claim 15 wherein said first ends are through-hole mount ends and wherein said power supply comprises a circuit board having corresponding vias therein, said through-hole mount ends adapted to pass through said vias.

17. The power supply as recited in claim 15 wherein said lead frame has a potting port that allows said potting material to be introduced between said lead frame and said shell.

18. The power supply as recited in claim 15 wherein said lead frame has a retention clip that engages and mechanically retains said board-mounted power supply in contact with said first ends.

19. The power supply as recited in claim 15 further comprising a compliant material, proximate said magnetic core, that absorbs compressive forces generated in said potting material.

20. The power supply as recited in claim 15 wherein said shell has a retention clip that engages and mechanically retains said lead frame in contact with said shell.

21. The power supply as recited in claim 15 wherein said lead frame and said shell are composed of plastic.