LED驱动器, 1输出, 升压, 2.5 V至5.5 V输入, 1.1 MHz开关, 36.5 V/1.2 A, TSOT-6
The from is an asynchronous boost converter for 10 WLEDs in 6 pin TSOT-23 package. It is a highly integrated LED driver IC capable of driving 10 WLEDs in series. It is composed of a current mode Boost converter integrated with a 36.5V/1.2A power switch. The RT4533 supports a wide input voltage range from 2.5V to 5.5V and runs at a fixed frequency of 1.1MHz. The LED current is set via an external resistor and the feedback voltage is regulated to 200mV with ±2% accuracy. The RT4533 is a constant frequency, current mode boost LED driver. In normal operation, the N-MOSFET is turned on when the PWM control circuit is set by the oscillator and is turned off when the current comparator resets the PWM Control circuit. While the N-MOSFET is turned off, the inductor current conducts through the external diode.
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- 36.5V open LED protection for 10 WLEDs
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- For brightness dimming, RT4533 supports PWM dimming which determines feedback reference voltage
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- Built-in soft start
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- Over current protection, Overtemperature protection
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- Internal compensation
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- Current limit
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- Quiescent current Iq typ is 0.35mA, Iout max/channel is 30mA