Fairchild Korea Semiconductor Ltd.

Jinhwa Chung

Byunghak Ahn

Moonho Choi

Jaewoon Kim

Sehwan Kim

Frank Chang

Disclosed are a load/charger detection circuit, a battery management system comprising the same and a driving method thereof. The load/charger detection circuit includes a current source; a current mirror connected to the current source to copy a current of the current mirror; at least two resistors connected between a first terminal providing a corresponding voltage to a charger or a load and a power supply; and a zener diode connected between the first terminal and the current mirror.

Load/charger detection circuit, battery management system comprising the same and driving method thereof

The present invention relates to an LED light emitting device and a driving method thereof. The LED light emitting device supplies a power supply voltage to at least two LED channels. The LED light emitting device samples channel voltages of the at least two LED channels to detect a minimum voltage from among the sampled voltages, and amplifies a difference between the detected minimum voltage and a predetermined reference voltage to generate an error amplifying signal. The LED light emitting device generates an enable signal having a duty extended by a predetermined delay period from a duty of a dimming signal for controlling light emission periods of the at least two LED channels. In this instance, the error generator is operable by the enable signal.

LED emitting device and driving method thereof

The present invention relates to an LED emitting device and a driving method thereof including at least two LED channels. If a power source voltage supplied to an LED emitting device reaches a predetermined threshold voltage, the power source voltage is maintained as a threshold voltage during an overvoltage regulation period.

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Seoul, South Korea

Jinhwa Chung