A711 線性驅(qū)動IC的應(yīng)用優(yōu)點及使用配合條件.PDF   

    The A711 is a high voltage, low dropout current regulator for high power LED that the maximum output current can be up to 1.1Amp. The output current was decided by an external resistor. The output sink current could be disabled via OE pin. PWM dimming function could also be controlled by OE pin. TO-263 package is available for good power dissipation ability. Build-in thermal protection to prevent the chip from over heat damage, and adequate thermal pad PCB area is required to control the junction temperature below 125°C.
　 Features
~0.8V Output Drop-out Voltage at 1.1Amp.
~1.1Amp. Maximum Output Current.
~Output Current Controlled by External Resisto
~3us Fast Response Output Stage Enable Control.
~Supply Voltage Range 5V~50V.
~Output Driving Voltage Up To 75V.
~TO-252-5L package
　 Applications
~High Power LED Driver
~RGB Full Color Power LED driver
~LCD Monitor/TV LED backlight Driver
~LED Table Lamp
Typical Applications


A711 線性驅(qū)動IC的優(yōu)點：
1.去除DC/DC一級電路節(jié)省成本及提高整機(jī)效率，A711模組效率可達(dá)98~93%
2.可輕易通過EMC
3.電路元件極少成本低，電路走線簡單
4.每路燈條和驅(qū)動板只有一條接線，排線少組裝容易
5.A711 Vdd 5~ 50V，輸出端75V耐壓，且封裝為TO-220可鎖散熱片可靠度高
6.A711 有EN Pin 可做各種開關(guān)斷保護(hù)措施，同時有Iset pin 可依各種溫度或光耦等元件，配合開關(guān)元件作電流的調(diào)節(jié)變化


在Vdrop電壓為3V條件下，燒機(jī)1小時，A711（TO263封裝）溫度只達(dá)42度（環(huán)境溫度28度）  

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