Datasheet > AOZ1978

AOZ1978

更新时间： 2024-11-15 12:25:03

品牌	Logo	应用领域
美国万代 - AOS		驱动器
页数	文件大小	规格书
17页	608K
描述
Dual Channel High Voltage LED Driver IC

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AOZ1978 数据手册

AOZ1978

Dual Channel High Voltage

LED Driver IC

General Description

Features

The AOZ1978 is a dual-channel high-efficiency LED

driver controller for high voltage LED backlighting

applications. It is designed to independently drive

two high-brightness LED light bars in LED TV

applications. The AOZ1978 can support a wide

range of input and output voltages. The input bias

voltage range of AOZ1978 is from 8V to 18V.



8V to 18V input bias voltage

180⁰ Out of phase channel switching provides

input ripple current cancellation



18V driving capability at GATE pins

Disconnect control pin for PWM dimming or fault

conditions



Flag to indicate output short or fault condition

500mV feedback regulation

The AOZ1978 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. An output flag to indicate the fault

condition if output of any channel is shorted to

ground.

External reference input and Analog Dimming

capability



8 bit PWM dimming resolution

Cycle-by-cycle current limit

Output over-voltage protection

LED short and open protection

Thermal shutdown protection

SO-20 package

Low feedback voltage (500mV) helps to reduce

power loss.

The AOZ1978 is available in a standard SO-20

package and operates over the temperature range of

-40C to +85C.

Applications



LCD TV LED backlight

Typical Application

www.aosmd.com

Rev. 1.0 January 2012

Page 1 of 1

12 3 4 5 6 7...17

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