Alpha & Omega Semiconductor AOZ1977

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

More information

• Datasheet
• IC product information