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AS1390B LED Power Converter

High power boost controller and buck converter for LED backlight


  • High efficiency: Up to 95%
  • Supply voltage range: 10V to 30V
  • Boost output current: Up to 3A
  • Continuous conduction mode
  • Undervoltage lockout with hysteresis

Product parameters

Input Voltage [V] 10-30
Output Voltage Boost Controller [V] 100
Output Current Boost [A] 3
Output Buck Converter 5V/100mA
Overvoltage Protection Yes
Overcurrent Protection Yes
Overtemperature Protection Yes
3D Features
Package SOIC-16

General Description

The AS1390B is a high-power, constant-frequency boost controller with an integrated buck converter. It is designed for single mode operation. The continuous conduction mode of the AS1390B provides superior bandwidth and transient response. The two output voltages for the boost controller (2D and 3D mode) can be programmed with an external resistor divider. The buck converter is optimized for suppling a /P with 5V. AS1390B is available in a 16-pin SOIC package.

This product suits for the following applications:

  • LED backlighting for LCD – TV sets and monitors

Technical Documents

Name Type Description Version Language
AS1390B_BD000289_1-00.png Block Diagram AS1390B Block Diagram 1-00 English
AS1390_DS000272_2-00.pdf Datasheet Document version 1.7 (AS1390A, AS1390B) 2-00 English
AS11xx_AS13xx_AS17xx_AS349x_AS36xx_EN000160_1-00.pdf EoL Notification AS11xx_AS13xx_AS17xx_AS349x_AS36xx (issued 2018-Oct) 1-00 English

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