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BL8548 - Variable Frequency Step-up DC/DC Converter

Description

The BL8548 variable frequency step-up Converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices.

Features

  • 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 3MHz 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 operate fro.

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Datasheet preview – BL8548

Datasheet Details

Part number BL8548
Manufacturer BELLING
File Size 375.36 KB
Description Variable Frequency Step-up DC/DC Converter
Datasheet download datasheet BL8548 Datasheet
Additional preview pages of the BL8548 datasheet.

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Full PDF Text Transcription

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BL8548 Max. 3MHz, Variable Frequency Step-up DC/DC Converter DESCRIPTION The BL8548 variable frequency step-up Converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features 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 3MHz 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.
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