MAX8901AETA+T

MAX8901AETA+T is a step-up converter drive from two to six series-connected white LEDs (WLEDs) with constant current to provide uniform WLED intensity for LCD backlighting in cell phones, PDAs, and other handheld devices. The MAX8901 operates at a fixed 750kHz (typ) switching frequency, allowing for tiny external components, and are optimized for the highest possible efficiency over the full 1-cell Li+/Li-Poly battery range. This converter use a single input (ON) to enable the IC and to control WLED intensity. The MAX8901A requires a direct PWM input to regulate WLED intensity with the WLED current proportional to the PWM duty cycle. Typical applications include display backlight (from 2 to 6 WLEDs), cellular phones, PDAs and smartphones, MP3 and portable media players, portable navigation devices, digital cameras.

• Cost-effective and flexible solution for wide range of backlighting applications
• 2.6V to 5.5V input voltage range, fixed-frequency operation
• Direct PWM dimming, flexible dimming control
• Protection features improve system reliability: WLED overvoltage protection (25V typ)
• Internal soft-start and thermal shutdown, input undervoltage lockout, input overvoltage lockout
• High efficiency extends battery life: up to 91% efficiency
• 0.01µA (typ) shutdown current
• No WLED current in shutdown
• 8 pin 2mm x 2mm TDFN package
• Operating temperature range from -40°C to +85°C

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Notas

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