AOZ1977-1 Datasheet, PDF (1/16 Pages) Alpha & Omega Semiconductors – High Voltage LED Driver IC

AOZ1977-1
High Voltage LED Driver IC
General 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
Applications
• LCD TV LED backlight
• LED monitor
• General LED lighting
Typical Application
Rev. 1.0 November 2011
www.aosmd.com
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