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IC manufacturers Alpha & Omega Semiconductor

IC manufacturers (84)

Alpha & Omega Semiconductor AOZ1977

High Voltage LED Driver IC

Overview

TopologyBoost Converter
Input voltage8-30 V
Switching frequency85-402 kHz
Output 116 V
IC revision2.1

Description

The AOZ1977 is a high-efficiency LED driver controller for high voltage LED backlighting applications. It is designed to drive a high-brightness LED light bar in LED TV applications. The AOZ1977 can support a wide range of input and output voltages. The input bias voltage of the AOZ1977 is from 8 V to 30 V.The AOZ1977 has multiple features to protect the regulator under fault conditions. A control pin can disable an external switch to disconnect the LEDs current path from the output in PWM dimming or under catastrophicfailure conditions. Cycle-by-cycle current protection limits the peak inductor current. Thermal shutdown provides an additional level of protection.Low feedback voltage (500 mV) helps reduce power loss.The AOZ1977 features a sync function to allow for synchronization with an external clock or multiple AOZ1977 devices.The AOZ1977 is available in a standard SO-16 package and operates over the -40 C to +85 C temperature range.

Features

  • 8 V to 30 V input bias voltage
  • Up to 16 V driving capability at GATE pin and DPWM pin.
  • Disconnect control pin for PWM dimming or fault conditions.
  • Bi-directional clock synchronization
  • 500 mV feedback regulation
  • 8 bit PWM dimming resolution
  • Cycle-by-cycle current limit
  • Output over-voltage protection
  • LED short and open protection
  • Thermal shutdown protection
  • SO-16 package

Typical applications

  • Monitor LED backlight
  • LCD TV LED backlight

Products

Order Code Data­sheet Downloads Product series Samples
750312370SPEC
Power Inductor
Order Code Data­sheet
750312370SPEC
Samples
Order Code Data­sheet Downloads Product series Samples