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OB3398 - High Precision Off-line Primary-Side PWM Power Switch

Download the OB3398 datasheet PDF. This datasheet also covers the OB3398-On variant, as both devices belong to the same high precision off-line primary-side pwm power switch family and are provided as variant models within a single manufacturer datasheet.

Key Features

  • OB3398 is a primary side regulation off-line LED.
  • High Precise Constant Current Regulation at lighting controller which can achieve accurate LED Universal AC input current. It significantly simplifies LED lighting.
  • Primary-side Sensing and Regulation Without system design by eliminating the secondary side TL431 and Opto-coupler feedback circuitry. Proprietary Constant Voltage.
  • Floating PSR control scheme with two (CV) and Constant Current (CC) control is transformer windi.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (OB3398-On-Bright.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number OB3398
Manufacturer On-Bright
File Size 778.79 KB
Description High Precision Off-line Primary-Side PWM Power Switch
Datasheet download datasheet OB3398 Datasheet

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Other Datasheets by On-Bright

Part Number Description
OB3394 High Precision PWM power switch
OB3396 High Precision Off-line Primary-Side PWM Power Switch
OB3396AP High Precision Off-line Primary-Side PWM Power Switch
OB3399PAP High Precision Offline LED Power Switch
OB3399TAP-H High Precision Offline LED Power Switch

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
OB3398 High Precision Off-line Primary-Side PWM Power Switch GENERAL DESCRIPTION FEATURES OB3398 is a primary side regulation off-line LED  High Precise Constant Current Regulation at lighting controller which can achieve accurate LED Universal AC input current. It significantly simplifies LED lighting  Primary-side Sensing and Regulation Without system design by eliminating the secondary side TL431 and Opto-coupler feedback circuitry. Proprietary Constant Voltage  Floating PSR control scheme with two (CV) and Constant Current (CC) control is transformer windings integrated as shown in the figure below.  Adjustable Constant Current and Output The LED current (CC control) can be adjusted Power Setting externally by the resistor Rs at CS pin.