SR8115 Pb Free Plating Product ® Pb SR8115 Single Channel LED Current Regulator Driver IC for T5/T8 General Description Features LED CRD IC SR8115 is a single channel LED constant current driver which Patented constant current control integrates patented constant current setting and control technology. The technology output current designed by external REXT is 5mA~60mA and it is invariant to Output current adjustable with range OUT output voltage change, which has better constant current performance. 5mA~60mA It is a low cost circuit with simple circuit and less external components. Inter-chip output current deviation <±4% Over temperature protection Sharing PCB board with LED lamps output current formula Excellence EMI performance VREXT 0.6V Simple circuit and low cost Iout Package：TO-252-2L REXT REXT Pin Diagram Applications T5/T8 LED tubes； LED street lighting； LED bulb lamp，LED ceiling lamp； TO-252-2L TO-252-2L/DPAK-2L 2 1 3 Typical Schematic Circuit Diagram Rev.05 © 2006 Thinki Semiconductor Co.,Ltd. Page 1/3 http://www.thinkisemi.com/ SR8115 ® Pin Description TO-252-2L/DPAK-2L Name No. Pin Description OUT 1 Power supply input and constant current output GND 2 Ground REXT 3 Output current setting port Absolute Maximum Parameter Unless otherwise stated, the ambient temperature is 25° C. Symbol Description Range Unit VOUT Voltage of OUT -0.5 ~ +450 V IOUT Current of OUT 1~ 60 mA TOPT Operating temperature -40 ~ +120 °C TSTG Storage temperature -50 ~ +150 °C VESD HBM 2 KV Thermal Resistor Parameter Symbol Description TO-252-2L Unit RTHJA Thermal resistor(1) 74.9 ℃/W Note (1): The chip needs to be welded to the PCB with 200 mm2 cooling copper foil, and the thickness of the copper foil is 35um. Electric Operating Parameter Unless otherwise stated, the ambient temperature is 25° C. Symbol Description Condition Min. Typ. Max. Unit VOUT_MIN Input voltage of OUT IOUT = 30mA - - 6.5 V VOUT_BV Withstand voltage of OUT IOUT = 0 450 - - V IOUT Output current ----- 5 - 60 mA IDD Quiescent current VOUT = 10V，REXT is opened - 0.16 0.25 mA VREXT Voltage of REXT VOUT = 10V - 0.6 - V IOUT = 20mA - ±4 - % - - 110 - ℃ DIOUT Error between chips and chips of IOUT Initial point of the negative TSC temperature compensation of the current Rev.05 © 2006 Thinki Semiconductor Co.,Ltd. Page 2/3 http://www.thinkisemi.com/ SR8115 ® The Series Connection of the Chip in the LED Tube The chip is connected to the GND, the middle of the LED lamp or ahead of the LED lamp according to different application. Parallel Application of the Chip Schematic diagram of the parallel application circuit Select the number of the parallel chips according to the number of the parallel LED lamps and the operating current of the LED lamp, the resistance of Rext1~RextN can be set to be the same or to be different. In the parallel application of the chip, when the value of the resistor Rext is different, the constant current threshold voltage of the complete system is the maximal threshold voltage of the parallel chip. Rev.05 © 2006 Thinki Semiconductor Co.,Ltd. Page 3/3 http://www.thinkisemi.com/