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HY3844 - (HY3842 / HY3845) PWM controller

Download the HY3844 datasheet PDF. This datasheet also covers the HY3842 variant, as both devices belong to the same (hy3842 / hy3845) pwm controller family and are provided as variant models within a single manufacturer datasheet.

General 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.

Key Features

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

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (HY3842-Hooyi.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number HY3844
Manufacturer Hooyi
File Size 932.37 KB
Description (HY3842 / HY3845) PWM controller
Datasheet download datasheet HY3844 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.