Alpha & Omega Semiconductor

AOZ1977

High Voltage LED Driver IC

Topologie: Boost
Eingangsspannung (min.): 8.00 V
Eingangsspannung (max.): 30.00 V
Schaltfrequenz (min.): 85.00 kHz
Schaltfrequenz (max.): 402.00 kHz

Erstveröffentlichung am 22.05.2012, Version 2.1

Beschreibung

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.

Merkmale

  • 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

Artikel

Artikel Nr. SPEC Produktserie Muster
750312370 PDF