LT8311MPFE#PBF

特殊功能芯片, 次级同步整流器, 3.7 V至30 V输入, TSSOP-20

The is a Synchronous Rectifier Controller that is used on the secondary side of a forward converter to provide synchronous MOSFET control and output voltage feedback through an opto-coupler. The LT8311"s unique preactive mode allows control of the secondary-side MOSFETs without requiring a traditional pulse transformer for primary- to secondary-side communication. In preactive mode, the output inductor current operates in discontinuous conduction mode DCM at light load. If forced continuous mode FCM operation is desired at light load, the LT8311 can, alternatively, be used in SYNC mode, where a pulse transformer is required to send synchronous control signals from the primary-side IC to the LT8311. The LT8311 offers a full featured opto-coupler controller, incorporating a 1.5% reference, a transconductance error amplifier and a 10mA opto-driver. Power good monitoring and output soft-start/overshoot control are also included.

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Preactive mode - No pulse transformer required, DCM operation at light load

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SYNC mode - FCM or DCM operation at light load, Achieves highest efficiency

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1.5% Feedback voltage reference

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10mA Opto-coupler driver

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Output power good indicator

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Integrated soft-start function

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Green product and no Sb/Br