Constant current control circuit

Details Constant current control circuit Constant current control circuit

2009-06-18

2011-10-25

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S267000

Reexamination Certificate

active

08044652

ABSTRACT:
A constant current control circuit is disclosed. Pads are connected with a common power supply terminal. Shunt resistors are located outward of a region containing Pch type MOS transistors. A temperature increase of the shunt resistors due to a temperature increase of the MOS transistors can be suppressed by the above structure. In particular, when the MOS transistor of one circuit system is driven, the shunt resistor of another circuit system is distant from the driving MOS transistor, and thus, it is possible to further suppress the temperature increase of the distant shunt resistor. Moreover, a power supply terminal can be provided as a single common terminal, and the number of terminals can be reduced.

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