STMicroelectronics | STLA02PUR

The STLA02PUR is a boost converter that operates from 2.5 V to 18 V and can provide an output voltage as high as 27 V and can drive up to 6 white LEDs connected in series. The device can be turned on/off by the logic signal connected to the EN pin and this pin is also dedicated for the PWM dimming of the output current.

The regulation is done by the internal error amplifier which works with the feedback voltage from the sensing resistor connected in high side sensing configuration. It has an Operating temperature ranges b/w -40 °C to 85 °C and available in a DFN-6 package.

Features:

• Boost DC-DC converter
• Drives up to 6 LEDs with a total current up to 20 mA
• Output power capability up to 500 mW
• Input voltage range 2.5 V to 18 V
• Output current control
• 2.3 MHz switching frequency
• PWM input for the output current dimming with 300:1 dimming range
• 350 mA integrated switch
• Overvoltage protection
• Chip overtemperature detection and protection
• Soft-start implemented

Applications:

• PDA and handheld devices
• Cellular phones
• MP3 players