Hot-selling and scarce SC4505MLTRT High Efficiency Boost Converter for Backlight/Flash LED Driver QFN spot stock

Product Descriptions

The SC4505 is a high-frequency PWM current-mode stepup switching regulator with an integrated 2A power transistor. Its high switching frequency (1MHz)allows the use of tiny surface-mount external passive components. The internal switch is rated at 36V which makes the converter ideal for multiple LED series operation with optimal current matching. Two programmable independent current source structure allows dual panel LED backlight and flash operation.

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The operating frequency of the SC4505 is set at  1MHz. The selected operating frequency gives the SC4505 design flexibility for size, cost and efficiency optimization. The SC4505 is available in thermally enhanced 16-pin MLPQ package (3x3x0.9mm) with embedded over temperature protection.

Product Features

Two independent current sources for dual LED strands with optimal current/light matching.  Backlight up to 75mA, Flash up to 125mA

Wide input range from 2.6V to 12V

Adaptive output voltage up to 28V with OVP protection against open circuit conditions

Low shutdown current (<1µA )

Internal Flash/Torch mode with flash timeout to protect LEDs

1MHz Fixed Frequency Current-Mode Control

Internal 2A current limit for driving large numbers of LEDs

Supports PWM Dimming from 50Hz to 50kHz

Internal undervoltage lockout

Small,low profile,thermally enhanced 16-MLPQ package is fully WEEE and RoHS compliant

Product Applications

White LED power supplies

Flat screen LCD bias supplies

TFT bias supplies

Dual panel Handset/Liquid Crystal Display Monitor

Portable media players

Digital video cameras

Digital still cameras

Product Specifications

Product Photos

For more product information, please download the PDF

WhenCE is HIGH (deselected),the device assumes a standby mode at which the power dissipation can be reduced down to250 µW (typical) with CMOS input levels.