Part # STLD40D datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: White LED power supply for large display backlight

Part Details:

STLD40D White led power supply for large display backlight General Features s Inductor switches boost controller s PFM mode control s High efficiency over wide range of input voltage from 3.0V to 5.5V s Overvoltage protection with automatic restart QFN8 (3mm x 3mm) s Adjustable peak current limit s Enable pin with possibility of PWM dimming high as 37V and can drive up to 10 white LEDs in control series. The converter is a PFM (pulse frequency s Low shutdown current <1uA modulation) inductor switches and can work in s Small external component discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch T s Good load and line regulation SW is fixed internally and allows limiting the switching s QFN 3mm x 3mm x 1mm 8 leads frequency. The output current capability is 20mA with an output voltage of 37V. Application The regulation is done by sensing the led current through the resistor R s White Led supply for LCD backlight LED. The device can be turned ON/OFF through the s Mobile phone logic enable signal pin EN. By applying a low s PDA and organizers frequency PWM signal the LEDs can be dimmed. s Any handsets powered form 3.0V to 5.5V The maximum peak inductor current can be programmed by connected a resistor RSET to the Description pin RSET. STLD40D is a boost converter that operates from 3.0V to 5.5V and can provide an output voltage as Order code Part number Package Comments STLD40DPMR

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STLD40D.pdf Datasheet