STLD40DPUR

STLD40DPUR is a white LED power supply for large display backlight in a 8 pin QFN package. It is a boost converter that operates from 3.0V to 5.5V. It can provide an output voltage as high as 37V and can drive up to 10 white LEDs in series. The converter is a PFM (pulse frequency modulation) inductor switch that can work in discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch TSW is fixed internally and allows limiting the switching frequency. The output current capability is 20mA with an output voltage of 37V. The regulation is done by sensing the LED current through the resistor RLED. The device can be turned ON/OFF through the logic enable signal pin EN. By applying a low frequency PWM signal the LEDs can be dimmed. The maximum peak inductor current can be programmed by connected a resistor RSET to the pin RSET. Typical applications include white LED supply for LCD backlight, mobile phone, PDA and organizers and any handsets powered form 3.0V to 5.5V.

• Inductor switches boost controller
• PFM mode control
• Over voltage protection with automatic restart
• Adjustable peak current limit
• Enable pin with possibility of PWM dimming control
• Low shutdown current <lt/> 1µA
• Small external component
• Good load and line regulation

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Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.