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AW9968DNR

High Efficiency, Support 0.3% PWM Dimming Boost WLED Driver with Flash Mode

The AW9968 is a white LED driver with integrated boost converter. With an internal 40V/3A switch FET, the AW9968 drives up a string of up to 10 LEDs in series. And it is quite applicable for smart phone as a flash mode light source, it can drive up to 3 times of full scale backlight current for 350ms when Strobe interface is high. The boost converter runs at 1.1MHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components. The backlight mode default white LED current is set with the external sense resistor R SET , and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. AW9968 integrates built-in soft-start function to minimize the power supply inrush current. AW9968 also integrates over-current protection, LED open protection and over temperature protection(OTP) to prevent chip from entering abnormal operating conditions.

产品特性

l  Support 0.3% PWM dimming

l  200mV Reference Voltage in Backlight Mode

l  1000mV Reference Voltage in Flash Mode

l  350ms Flash Mode Timer

l  PWM control input for CABC operation

l  1.1MHz Switching Frequency

l  38V Over-voltage Protection for up to 10 LEDs in Series

l  Innovative CDC Output Drive Technology

l  Significantly Improve EMI Performance

l  2.7V to 5.5V Input Voltage Range

l  Over-current and Over-temperature Protection

l  Built-in Soft-start Limits Inrush Current

l  DFN 2mmX2mm-6L package


Datasheet

Application note

产品型号 文档格式 大小 下载
AW9968DNR PDF 1.58M
  • Total Max Number
    Control Interface
    Min Duty(%)
    VRef_PWM
    Flash Mode
    Switching Frequency (MHz)
    Package (mm)
封装形式 引脚数 长(mm) 宽(mm) 厚(mm) 引脚间距(mm) 散热盘 文档下载
DFN 2.0×2.0×0.75 -6L(A) 6 2.0 2.0 0.75 0.65 Y
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