BL8545 - High Efficiency Low Noise PFM Step-up DC/DC Converter

BELLING

Datasheet Details

Part number	BL8545
Manufacturer	BELLING
File Size	66.80 KB
Description	High Efficiency Low Noise PFM Step-up DC/DC Converter
Datasheet	BL8545-BELLING.pdf

The BL8545 PFM step-up Converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other handheld devices.

allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LEDs brightness. The fast 500KHz to 2MHz operation frequency allows for smaller capacitor and inductor. Fault condition protection uses cycle-by cycle current limiting to sense maximum inductor current and over-voltage protection. The 0.2V low reference voltage minimized the power loss across the current sense resistor. The converter can o.

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Published: Sep 1, 2015 |