ANX6934AAQX,8通道LED驅(qū)動(dòng)器，全新原裝，門(mén)市自取或當(dāng)天發(fā)貨。
ANX6934
8通道LED驅(qū)動(dòng)器
特征
2.7V至24V的寬輸入范圍
集成2.8A/40V升壓FET網(wǎng)關(guān)
封裝證明和軟啟動(dòng)
晶體電流接收器
通道的電流高達(dá)60mA
從100Hz到30kHz的PWM調(diào)光
2.5%電流匹配
3%電流精度
保護(hù)：
LED串開(kāi)路/短路檢測(cè)
過(guò)電壓保護(hù)
過(guò)流保護(hù)
超溫保護(hù)
薄3x3 mm 16WQFN封裝芯
符合Rohs和10%（Pb）-
應(yīng)用
筆記本電腦/筆記本電腦/平板電腦/Ultrabook
車(chē)載導(dǎo)航器/娛樂(lè)打開(kāi)
可變功能燈
ANX6934AAQX WQFN-16L，3x3
說(shuō)明：
ANX6934是一種高度的白色LED專為薄膜分析的驅(qū)動(dòng)器（TFT）顯示器（LCD）背光。
該芯片可以驅(qū)動(dòng)多達(dá)8串LED最多可串串10個(gè)LED。寬的串輸入電壓范圍為2.7V至24V，ANX6934非常適合應(yīng)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(gè)
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(dá)60mA。反饋電路
感應(yīng)LED電流接收器電壓和
補(bǔ)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(guò)監(jiān)控
LED字符串。未使用的LED通道可以
通過(guò)將通道連接至禁止禁止。
ANX6934通過(guò)以下方式控制LED變光
脈寬調(diào)制（PWM）方法。
LED 電流打開(kāi)和關(guān)閉，以響應(yīng)
詞匯的占空比和頻率
PWM。
ANX6934 具有多種保護(hù)功能
功能包括過(guò)電流保護(hù)（OCP），
超保護(hù)（OTP），溫度
過(guò)壓保護(hù)（OVP）和LED串
開(kāi)路和短路檢測(cè)。
如果啟用，軟啟動(dòng)將啟用功能逐步輸出電壓，避免電壓過(guò)沖和浪涌電流。如果打開(kāi)一個(gè)字符串，
LED開(kāi)路檢測(cè)電路檢測(cè)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.
