SE3362
2021-06-17
The SE3362 is a charge pump operating in either 1x mode or 2x fractional mode regulating current through each of the 4 LED pins. Operation at a fixed high frequency of 1MHz typical allows the use of very small value ceramic capacitors.
The SE3362 drives white light-emitting diodes (LED) connected in parallel and provides tightly matched regulated current to achieve uniformity of brightness in LCD backlighting applications. An external resistor RSET controls the output current level. LED currents of up to 30mA are supported over a range of input supply voltages from 2.85V to 5.5V, making the device ideal for battery-powered applications.
LED dimming can be accomplished by several methods including using a resistor Rset (the exact formula will be provided in the Application Section) to set the RSET pin current, applying a PWM signal on the Control signals, or adding a switched resistor in parallel with Rset. The Enable input pin allows the device to be placed in power-down mode with close to "zero" quiescent current. The SE3362 features short circuit and Over Temperature Protection (OTP). The device is available in a 16- lead thin QFN package with a max height of 0.8mm.
