Vehicle electronic control unit

• US 20040159461A1
• Filed: 02/17/2004
• Published: 08/19/2004
• Est. Priority Date: 02/17/2003
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Morishima, Tamotsu, Kato, Keiichi
• Application Number:
  US10/778,114
• Publication Number:
  US 20040159461A1
• Time in Patent Office: Days
• US Class Current: 174/250
• CPC Class Codes: B60R 16/0239 Electronic boxes
• 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 2201/09754 Connector integrally incorporated in the printed circuit board [PCB] or in housing
• CPC Class Codes: H05K 2201/10166 Transistor
• CPC Class Codes: H05K 2201/10174 Diode
• CPC Class Codes: H05K 2201/10287 Metal wires as connectors or conductors
• CPC Class Codes: H05K 2203/1316 Moulded encapsulation of mounted components
• CPC Class Codes: H05K 3/103 by bonding or embedding conductive wires or strips
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence
• CPC Class Codes: H05K 3/3447 Lead-in-hole components H05K3/3415 takes precedence

Abstract

In a vehicle electronic control unit, a power device and a circuit component, which structure a circuit in which current flows when the power device is driven, and a printed board are disposed within an aluminum case as a housing. Both the power device and the circuit component are disposed within a resin mold unit in a state where both the power device and the circuit component are wired so that a loop circuit is structured as a current path. Both the power device and the circuit component are mounted on the printed board by using a connection terminal which protrudes from the resin mold unit. According to the vehicle electronic control unit, noise and efficiency of the circuit can be improved because a loop of large current can be reduced.

Claims

1. A vehicle electronic control unit, comprising:

a housing;

a circuit board disposed in the housing;

a power device and a circuit component for structuring a circuit in which current flows while the power device is driven;

a resin mold unit including therein both the power device and the circuit component in a state where both the power device and the circuit component are wired so that a loop circuit is structured as a current path; and

a connection terminal protruding from the resin mold unit to mount both the power device and the circuit component on the circuit board.

3. The vehicle electronic control unit according to claim 1, wherein the power device is disposed so that a heat radiating portion of the power device within the resin mold unit faces the housing.

4. The vehicle electronic control unit according to claim 1, further comprising:

a member with high thermal-conductivity disposed between the power device and the housing.

6. The vehicle electronic control unit according to claim 4, wherein the member with high thermal-conductivity has flexibility.

7. The vehicle electronic control unit according to claim 1, wherein:

the resin mold unit has a component accommodating portion, opening on a surface facing the circuit board; and

the component accommodating portion accommodates an electronic component, which is disposed in-a portion where the resin mold unit is mounted on the circuit board and is different from the power device and the circuit component.

8. The vehicle electronic control unit according to claim 1, wherein:

the circuit in which current flows is a DC-DC converter circuit including a power transistor, a diode, a capacitor and a reactor; and

the circuit is within the resin mold unit in a state where the power transistor, the diode, the capacitor and the reactor are connected by required wiring.

2. A vehicle electronic control unit, comprising:

a housing;

a circuit board disposed in the housing;

a heat generating component and a circuit component for structuring a circuit in which current flows while the heat generating component is driven;

a resin mold unit including therein both the heat generating component and the circuit component in a state where both the heat generating component and the circuit component are wired so that a loop circuit is structured as a current path; and

a connection terminal protruding from the resin mold unit to mount both the heat generating component and the circuit component on the circuit board, wherein a heat radiating portion of the heat generating component and the housing are connected thermally.

5. The vehicle electronic control unit according to claim 2, further comprising:

a member with high thermal-conductivity disposed between the heat radiating portion of the heat generating component and the housing.