LED driving circuit package

A light-emitting diode (LED) driving circuit package, comprising:

• a rectification unit comprising diodes to rectify an alternating current (AC) power voltage to generate a ripple voltage;
• an LED driving switching unit comprising a plurality of switch units connected to respective cathodes of a plurality of external series-connected LEDs and a plurality of current control units connected to the respective switch units;
• and
• a low voltage control unit comprising:
• a circuit power supply unit to generate low voltage power;
• a voltage detection unit connected to the rectification unit and configured to detect a magnitude of the ripple voltage;
• a reference frequency generation unit connected to the circuit power supply unit and the voltage detection unit and configured to generate a reference frequency;
• and
• a reference pulse generation unit connected to the circuit power supply unit and the voltage detection unit and configured to generate a reference pulse for controlling the operation of the LED driving switch unit in response to the reference frequency generated by the reference frequency generation unit and a magnitude of the voltage detected by the voltage detection unit, wherein:
• at least one of the diodes of the rectification unit is disposed on a diode mounting pad as an individual element;
• current supplied to at least one of the LEDs via a certain switch unit is controlled by the current control unit connected to the certain switch unit so as to be constant current;
• and
• the LED driving switch unit is connected between the low voltage control unit and the plurality of external series-connected LEDs such that inputs of the plurality of switch units are directly connected to the low voltage control unit and outputs of the plurality of switch units are respectively directly connected to the cathodes of the plurality of external series-connected LEDs.

A light-emitting diode (LED) driving circuit package, comprising:

• a board having a die attach area at a center portion thereof;
• an LED chip attached to the die attach area, the LED chip comprising LED cells;
• and
• electrode pad units disposed on the board and around the die attach area and respectively connected to switches,
• wherein:
• each LED cell comprises a series electrical connection to a neighboring LED cell;
• each electrode pad unit is respectively electrically connected to a terminal unit of the LED cells via a wire;
• and
• the respective terminal units are configured to input and output driving current and form electrical connections to the switches in the respective LED cells.