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LT1508 - Power Factor and PWM Controller(Voltage Mode)

This page provides the datasheet information for the LT1508, a member of the LT1 Power Factor and PWM Controller(Voltage Mode) family.

Datasheet Summary

Description

The LT ® 1508 is a complete solution for universal off-line switching power supplies utilizing active power factor correction.

The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally.

Features

  • s s s s s s s s s s s s.

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Datasheet preview – LT1508

Datasheet Details

Part number LT1508
Manufacturer Linear Technology
File Size 337.19 KB
Description Power Factor and PWM Controller(Voltage Mode)
Datasheet download datasheet LT1508 Datasheet
Additional preview pages of the LT1508 datasheet.

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Full PDF Text Transcription

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LT1508 Power Factor and PWM Controller (Voltage Mode) FEATURES s s s s s s s s s s s s DESCRIPTION The LT ® 1508 is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally. The voltage mode PWM section (LT1509 is the current mode counterpart) contains all the primary side functions to convert the PFC preregulated high voltage output to an isolated low voltage output. The PWM duty cycle is internally limited to 47% (maximum 50%) to prevent transformer saturation. PWM soft start begins when the PFC output reaches the preset voltage.
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