LM5046MH

TEXAS INSTRUMENTS  LM5046MH  控制器, 全桥, 30V-12.5V电源, 2 MHz, TSSOP-28

The is a Pulse Width Modulated PWM Controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter using either current-mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A high- and low-side gate drivers for the four external bridge MOSFETs, plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the dead-time to enable zero-volt switching of the primary FETs. Intelligent startup of the synchronous rectifiers allows monotonic turn-on of the power converter even with pre-bias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start and a 2MHz capable oscillator with synchronization capability and thermal shutdown.

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Highest integration controller for small

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Form factor, high-density power converters

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High-voltage start-up regulator

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Intelligent sync rectifier start-up allows

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Linear turn-on into pre-biased loads

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Synchronous rectifiers disabled in UVLO mode and hiccup mode

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Two independent, programmable dead-time

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Adjustments to enable zero-volt switching

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Four high-current 2A Bridge gate drivers

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Wide-bandwidth opto-coupler interface

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Dual-mode overcurrent protection

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Programmable line UVLO and OVP

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Green product and no Sb/Br

Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.