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IC manufacturers Alpha & Omega Semiconductor

IC manufacturers (84)

Alpha & Omega Semiconductor AOZ1977-1

High Voltage LED Driver IC

Overview

TopologyBoost Converter
Input voltage8-30 V
Switching frequency85-402 kHz
Output 1200 V / 0.2 A
IC revision1.0

Description

The AOZ1977-1 is a high-efficiency LED driver controller for high voltage LED backlighting applications. It is designed to drive high-brightness LED light bar in LED TV applications. The AOZ1977-1 can support a wide range of input and output voltages. The input bias voltage of AOZ1977-1 is from 8V to 30V.The AOZ1977-1 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 catastrophic failure conditions. Cycle-by-cycle current protection limits the peak inductor current. Thermal shutdown provides another level of protection.Low feedback voltage (500mV) helps reduce power loss.The AOZ1977-1 features sync function to allow for synchronization with external clock or multiple AOZ1977-1.The AOZ1977-1 is available in a standard SO-16 package and operates over the temperature range of -40°C to +85°.

Features

.8V to 30V input bias voltage

  • Up to 16V driving capability at GATE pin and DPWM pin.
  • Disconnect control pin for PWM dimming or fault conditions.
  • Bi-directional Clock synchronization
  • 500mV feedback regulation
  • Feedback short protection
  • 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 Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
744770256SPEC
8 files WE-PD SMT Power Inductor 560 0.8 0.9 593 1070 2.5 1280 Standard
Order Code Data­sheet Simu­lation
744770256SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples