XC9401 Series ETR3201-009 Off-line Controllers for LED Lighting GENERAL DESCRIPTION The XC9401 series are off-line controller ICs for LED lighting. Through optimization of the external components, these ICs can be made to operate in a range from 85VAC to 270VAC, as well as by DC input, and a diversity of specifications can be achieved by selecting components appropriate for the circuit configuration. Fixed off-time control is used for the basic control method, and by detecting the current that flows to the external power MOSFET, the current that flows to the LED is monitored to provide a stable power supply for LED lighting. Three product series differing by function type are available, the XC9401A type, XC9401B type and the XC9401C type. The circuit configuration of type A is designed for the power factor, achieving a high power factor by synchronizing the LED current to the input current (sine wave). Type B and C holds the peak current due to switching that flows to the external power MOSFET constant, enabling the LED current to be kept constant. With the type C, dimming is possible by inputting a PWM signal into the EN/DIM pin to set the LED current within a range of 1% to 100%. APPLICATIONS TYPICAL APPLICATION CIRCUITS LED bulb (GU-10, MR-16, Other) (XC9401C60CSR-G Non-isolation buck Type) LED tube lights LED down lights LED spot lights LED stands FEATURES Operating Voltage : 85VAC ~ 270VAC DC Input I Voltage : 0.34V 2.5% (Type C) SEN Fixed Off-time : 6.0 s o Protection Circuits : Thermal Shutdown 150 C (TYP.) V Over voltage protection, V =18V (TYP.) DD DD UVLO, V =6.5V (TYP.) DD Over current protection, V =0.7V (TYP.) ISEN Dimming : PWM Dimming (LED Current:1%100% 1kHz, Type C) Packages : SOT-26 (Type A, Type B) SOT-25 (Type C) o o Operating Ambient Temperature : -40 C ~ +85 C Environmentally Friendly : EU RoHS Compliant, Pb Free SOLUTION EXAMPLES Reference designs Isolation/ Input Voltage Product Topology Output LED Voltage/ Efficiency/ Non-Isolation Option Power LED Current Power Factor - 100VAC/110VAC XC9401C60CSR-G Non-Isolation Buck 7.2W 60V/120mA 91%/0.5~0.65 XC9401C60CSR-G Non-Isolation Buck 7.2W 60V/120mA 85%/0.5~0.65 - 220VAC/240VAC XC9401C60CSR-G Isolation Flyback 7.0W 19.2V/360mA 83%/0.5~0.65 - XC9401A605MR-G Isolation Flyback 7.2W 20V/360mA 82%/0.9~ - 400VDC XC9401C60CSR-G Non-Isolation Buck 104W 200V/520mA 97% With PFC circuit 15VDC XC9401C60CSR-G - Buck 3.5W 9.6V/350mA 92% - 12VAC XC9401C60CSR-G - Buck 2.7W 9V/300mA 87% For MR16 *Due to dispersion of constant values of external components, the above values may be deviated. Please understand that the above are typical values. For details, refer to the XC9401 Series Application Notes. 1/24 XC9401Series BLOCK DIAGRAM 1) XC9401 Series, Type A V DD VREF Voltage Regulator to Internal Circuits (Bandgap reference) 5V Thermal Shutdown 150 180 UVLO OVP 6.5V / 7.5V 16.5V / 18V Off Time Controller EN/DIM 140s & EN/DIM DELAY (Over Current Limit) Off Time Controller 6s Min. ON Time Controller Buffer Drive V SINE & Logic GATE Voltage Level Shifter 0.7V 0.2783 PWMCMP CMP GND I SEN Over Current Limit 2) XC9401 Series, Type B V DD V Voltage Regulator REF to Internal Circuits (Bandgap reference) 5V Thermal Shutdown 150 180 UVLO OVP 6.5V / 7.5V 16.5V / 18V Off Time Controller EN/DIM 140s & EN/DIM (Over Current Limit) DELAY Off Time Controller 6s Min. ON Time Controller Buffer Drive NF & Logic GATE Voltage Level Shifter 0.7V 0.3430V PWMCMP CMP GND I SEN Over Current Limit * Diodes inside the circuit are an ESD protection diode and a parasitic diode. 2/24