ANX6934

ANX6934屬性

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ANX6934描述

ANX6934,8通道LED驅(qū)動器，全新原裝，門市自取或當天發(fā)貨。

ANX6934

8通道LED驅(qū)動器

特征

2.7V至24V的寬輸入范圍

集成2.8A/40V升壓FET網(wǎng)關

封裝證明和軟啟動

晶體電流接收器

通道的電流高達60mA

從100Hz到30kHz的PWM調(diào)光

2.5%電流匹配

3%電流精度

保護：

LED串開路/短路檢測

過電壓保護

過流保護

超溫保護

薄3x3 mm 16WQFN封裝芯

符合Rohs和10%（Pb）-



應用

筆記本電腦/筆記本電腦/平板電腦/Ultrabook

車載導航器/娛樂打開

可變功能燈

ANX6934AAQX WQFN-16L，3x3

說明：

ANX6934是一種高度的白色LED專為薄膜分析的驅(qū)動器（TFT）顯示器（LCD）背光。

該芯片可以驅(qū)動多達8串LED最多可串串10個LED。寬的串輸入電壓范圍為2.7V至24V，ANX6934非常適合應用，從單芯鋰電池平板電腦到，全尺寸筆記本電腦。ANX6934 具有組合的高效率

電流模式升壓。八個

集成電流接收器提供高

精密電流調(diào)節(jié)和匹配

LED電流高達60mA。反饋電路

感應LED電流接收器電壓和

補償LED的不均勻性

LED串上累積的正向電壓。

為了將功率輸出，輸出電壓

通過監(jiān)控

LED字符串。未使用的LED通道可以

通過將通道連接至禁止禁止。

ANX6934通過以下方式控制LED變光

脈寬調(diào)制（PWM）方法。

LED 電流打開和關閉，以響應

詞匯的占空比和頻率

PWM。

ANX6934 具有多種保護功能

功能包括過電流保護（OCP），

超保護（OTP），溫度

過壓保護（OVP）和LED串

開路和短路檢測。

如果啟用，軟啟動將啟用功能逐步輸出電壓，避免電壓過沖和浪涌電流。如果打開一個字符串，

LED開路檢測電路檢測到此故障所有其他電流接收器都可以繼續(xù)正常工作。



ANX6934

8 – Channel LED Driver

FEATURES

Wide input range from 2.7V to 24V

Integrated 2.8A/40V boost converter FET

Built-in loop compensation and_soft-start

Eight programmable current sinks

Current up to 60mA per channel

PWM dimming from 100Hz to 30kHz

2.5%_current matching

3%_current accuracy

Protection:

LED string open/short detection

Adjustable overvoltage protection

Over-current protection

Over-temperature protection

Thin 3x3 mm 16-lead WQFN package

Rohs compliant and_100%_Lead(Pb)-

Free/Green

APPLICATIONS

Notebook/Ultrabook/Tablet PC Display

Backlight

Car Navigator/Entertainment Display

Backlight

Flash light or utility light

ANX6934AAQX WQFN-16L, 3x3

DESCRIPTION

The ANX6934 is a highly compact white LED

driver especially optimized for thin-film transistor

(TFT) liquid crystal displays (LCDs) backlight.

The chip can drive up to eight strings of LEDs

and_up to ten LEDs in series per string. Wide

input voltage range from 2.7V to 24V makes

ANX6934 well suited for applications ranging

from a one-cell lithium-ion battery tablet PC to a

full-size notebook PC.

The ANX6934 offers a built-in high efficiency

current mode boost converter. The eight

integrated current sink regulators provide high

precision current regulation and_matching for

LED currents up to 60mA. The feedback loop

senses LED current sink voltages and_

compensates for the non-uniformity of the LED

forward voltage accumulated on the LED strings.

To minimize the power loss, the output voltage

of the boost converter is automatically adjusted

by monitoring the highest forward voltage of the

LED strings. An unused LED channel can be

disabled by connecting the channel to ground.

The ANX6934 controls LED dimming through

the pulse-width-modulation (PWM) method. The

LED current is turned on and_off in response to

the duty cycle and_frequency applied at the

PWM pin.

The ANX6934 features several protection

functions including overcurrent protection (OCP),

overtemperature protection (OTP), adjustable

overvoltage protection (OVP), and_LED string

open and_short detection. Once the device is

turned on, the soft-start function raises the

output voltage gradually to avoid voltage overshoot and_inrush current. If one string opens,

the LED open detection circuit detects this fault

and_excludes this current sink from the regulation loop. All other strings continue to work normally.


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