Alpha & Omega Semiconductor


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
Ausgang 1: 200.00 V / 0.200 A

Erstveröffentlichung am 22.11.2011, Version 1.0


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°.


  • .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


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Bauform Version Muster
744770256 PDF WE-PD SMT-Speicherdrossel 560 0.8 0.9 593 1070 2.5 1280 Standard