MT7004B

Maximizing IC Performance MT7004B Boost LED Driver With High Frequency PWM Dimming DESCRIPTION The MT7004B is a Boost LED driver for driving up to 39 LEDs (3-series and 13-parallel) from a 5V system rail. The MT7004B uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 110mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition. The MT7004B includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. FEATURES  2.7V to 6V input voltage range  Boost PWM with internal power MOSFET  Drives up to 39 LEDs at 5V input.  Up 90% Efficiency  Low feedback voltage: 110mV  PWM dimming frequency from 100Hz to 200kHz  Under-Voltage lockout (UVLO) protection  Intern...