ANX6934AAQ,8通道LED驅動器，全新原裝，門市自取或當天發貨。ANX6934
8通道LED驅動器
特征
2.7V至24V的寬輸入范圍
集成2.8A/40V升壓FET網關
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專為薄膜分析的驅動器（TFT）顯示器（LCD）背光。
該芯片可以驅動多達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節和匹配
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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