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Atmel LED Drivers-MSL3167/MSL3168
16-string, White LED Drivers with Adaptive Power Control,
Simple PWM Dimming Interface, and Fault Handling
Setting the Maximum LED String Current with R ILED
The maximum string current, I ILED , for all 16 LED strings is set by a single external resistor, R ILED , placed from ILED to GND.
Determine the value for R ILED using:
R ILED =
762
I ILED
, where I ILED is in mA and R ILED is in k ? .
For example, a full-scale maximum LED string current of 19.9mA returns R ILED = 38.3k ? .
Efficiency Optimizer
The Efficiency Optimizer (EO) improves power efficiency by injecting a current of between 0 and 255μA into the voltage
divider of the external power supply (Figure 5), dynamically adjusting the power supply’s output to the minimum voltage
required by the LED strings. This ensures that there is sufficient voltage available for LED current control and good power
supply noise rejection, while minimizing power dissipation. The power supply must have a nominal feedback voltage of no
more than 3.5V, and the voltage setting resistor divider must be accessible (sizing the resistors is covered in the next section).
Figure 5. Atmel LED Drivers-MSL3167/8 FBO Connection to Power Supply Voltage Divider
Atmel LED Drivers-MSL3167/MSL3168
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相关代理商/技术参数
MSL3167GU-R 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL3168GU 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL3168GU-R 功能描述:LED照明驱动器 16Str Wht Simple PWM Dimming Intrfce, F RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MSL-3-2/10 制造商:Cooper Bussmann 功能描述:
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MSL3SG00P 制造商:Hubbell Wiring Device-Kellems 功能描述:SW.PSDA,3-G,SPEC.GRADE W/PASS THRU
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