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MAX8728 - Low-Cost - Multiple-Output Power Supply

Description

The MAX8728 generates all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in TVs and monitors.

It includes step-down and step-up regulators, positive and negative charge pumps, and a dualmode, logic-controlled high-voltage switch control block.

Features

  • Optimized for 10.8V to 13.2V Input Supply 7V to 13.2V Input Supply Range Selectable Frequency (500kHz/1MHz/1.5MHz) Current-Mode Step-Down Regulator 14V Internal n-Channel MOSFET 1.5% Accurate Output Current-Mode Step-Up Regulator 19V Internal n-Channel MOSFET 1% Accurate Output True Shutdown™ (Output Goes to Zero) 180° Out-of-Phase Switching Adjustable Positive/Negative Charge Pumps Soft-Start and Timer Delay Fault Latch for All Outputs Logic-Controlled, High-Voltage Switches Power-Up and Power.

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Full PDF Text Transcription

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19-3910; Rev 0; 1/06 www.DataSheet4U.com Low-Cost, Multiple-Output Power Supply for LCD Monitors/TVs General Description The MAX8728 generates all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in TVs and monitors. It includes step-down and step-up regulators, positive and negative charge pumps, and a dualmode, logic-controlled high-voltage switch control block. The MAX8728 can operate from input voltages from 7V to 13.2V and is optimized for LCD TV panel and LCD monitor applications running directly from 12V supplies. The step-up and step-down regulators feature internal power MOSFETs and high-frequency operation allowing the use of small inductors and capacitors, resulting in a compact solution.
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