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Internal Regulators and Enable Input
The MSL2160/1 includes two internal linear regulators that provide VCC (5V) and VDD (2.5V) for internal circuitry. VIN
(12V nominal) supplies the VCC and VDD regulators. Bypass VIN to GND with a 10μF capacitor close to the device. Bypass
VCC to GND with a 4.7μF capacitor close to the device. Bypass VDD to GND with a 4.7μF capacitor close to the device.
The MSL2160/1 enables input, EN, enables the device. Drive EN low to enter low power operation, which lowers
quiescent current draw to less than 20μA. With EN low, the serial interface is ignored, the Efficiency Optimizer is disabled,
and all strings are turned off. Drive EN high to turn on the device. When EN is driven high, the contents of the EEPROM
are boot loaded into the control registers, simulating a cold start up, and all bits in the fault registers are cleared to 0.
Setting the Maximum LED String Current with a Source Resistor
The maximum string current, I LEDn , for each string is set by a shunt resistor connected to ground from the source terminal
of the string drive MOSFET. The feedback threshold is 500mV. Determine the resistor value using:
R S =
0 . 5 , where I LED
I LED
is in amperes and R S is in ohms.
For example, a full-scale LED current of 100mA returns R S = 5 ? . The current for all LED strings is reduced
from the full-scale value with 8-bit resolution using ISTR, the string current control register 0x31.
Figure 5. FBOn Connects to the Power Supply Voltage Divider Through a Diode.
20
Atmel LED Drivers-MSL2160/MSL2161
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相关代理商/技术参数
MSL2160DQ-R 功能描述:LED照明驱动器 16String White & RGB LED Drivers with A 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
MSL2161 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:16-string, White and RGB LED Drivers with Adaptive Configuration, EEPROM, and SPI/I2C/SMBus Serial Interface
MSL2161DQ 功能描述:LED照明驱动器 16String White & RGB LED Drivers with A 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
MSL2161DQ-R 功能描述:LED照明驱动器 16String White & RGB LED Drivers with A 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
MSL2162DQ 功能描述:LED照明驱动器 16-String RGBWhite LED Dvrs AdapCon E2P 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
MSL2162DQ-R 功能描述:LED照明驱动器 16String White & RGB LED Driver with Ad 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
MSL2164-DU 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 3FO 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
MSL2164-DUR 功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 3FO 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