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 persity 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 1
Input Voltage Product
Isolation/
Non-Isolation
Topology
Reference designs
Output
Power
LED Voltage/
LED Current
Efficiency/
Power Factor
Option
100VAC/110VAC XC9401C60CSR-G Non-Isolation Buck 7.2W 60V/120mA 91%/0.5~0.65 -
220VAC/240VAC
XC9401C60CSR-G Non-Isolation Buck 7.2W 60V/120mA 85%/0.5~0.65 -
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
TOREXsi
■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 persity 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%.
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