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EC4188B Datasheet(PDF) 1 Page - E-CMOS Corporation |
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EC4188B Datasheet(HTML) 1 Page - E-CMOS Corporation |
1 / 10 page High Power Factor & Accuracy Constant Current LED Driver EC4188B E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 10 4C26N-Rev.P001 General Description The EC4188B is a highly-integrated, low startup current, average current mode, one cycle control PFC and fixed switching frequency PWM controller. These functions enable the LED driver to easily meet the accuracy average LED current and high power factor requirements. The integrated functions also include the LED short protection, open protection, and internal over temperature protection. The COMP pin controls the duty by connected an RC compensation network to ground and forming the closed loop feedback control. To protect the external power MOSFET from being damaged by supply over voltage, the EC4188B OUT pin voltage is clamped to about 15V. The EC4188B improves the performance and reduces the cost of the LED driver. It is a 6-pin SOT23-6L package. Features ●High Power Factor by One Cycle Control ●Accuracy Constant Current ●Low BOM Cost ●Linear Dimming on DIM Pin ●Average Current / Fixed Frequency Control ●Gate Output Voltage Clamp ●LED Open Protection (OVP) ●LED Short Protection (SCP) ●Over Current Protection (OCP) ●Internal OTP Protection ●300mA Driving Capability for OUT Pin ●Fast Start Current ●Incompatible Electronic Ballast and Inductance Ballast Applications ● E26/27, T8 LED Tube ● Others LED Lighting Applications Pin Assignments Pin Description Pin No. Name Function 1 VCC Power Supply Pin 2 GND Ground Pin 3 OUT The Output Driver for Driving The External MOSFET 4 DIM Dimming Control Pin by Input a DC Voltage 5 COMP Feedback Compensation Network 6 CS Current Sense Pin, Connect to Sense The MOSFET Current |
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