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HY3845 - (HY3842 / HY3845) PWM controller

This page provides the datasheet information for the HY3845, a member of the HY3842 (HY3842 / HY3845) PWM controller family.

Description

The HY3842D-N/3843D-N/3844D-N/3845D-N, are fixed frequency current mode PWM controller.

Line and DC to DC converter applications with a minimal external components.

Features

  • Low Start-Up and Operating Current High Current Totem Pole Output Under voltage Lockout With Hysteresis Operating Frequency Up To 500KHz BLOCK.

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Datasheet preview – HY3845

Datasheet Details

Part number HY3845
Manufacturer Hooyi
File Size 932.37 KB
Description (HY3842 / HY3845) PWM controller
Datasheet download datasheet HY3845 Datasheet
Additional preview pages of the HY3845 datasheet.

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Full PDF Text Transcription

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HY3842/43/44/45 DESCRIPTION The HY3842D-N/3843D-N/3844D-N/3845D-N, are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Protection circuitry includes built under voltage lockout and current limiting. The HY3842D-N, HY3844D-N, have UVLO thresholds of 16 V (on) and 10 V (off). The corresponding thresholds for the HY3843D-N/3845D- N are 8.4V (on) and 7.6V (off). The HY 3842D-N, HY3843D-N, can operate within 100% duty cycle.
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