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参数资料
| 型号： | MSL3162BT-R |
| 厂商： | Atmel |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR 16 CHAN PWM 40TQFN |
| 产品培训模块： | Industrial Panel Backlighting Driver ICs LED Lighting Drivers LED Driver Basics |
| 标准包装： | 2,500 |
| 系列： | Adaptive SourcePower™ |
| 拓扑： | 交直流离线开关，PWM |
| 输出数： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，通用 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 18MHz ~ 22MHz |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN（6x6） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | MSL3162BT-R-ND |
Atmel LED Driver-MSL3162
16-string, RGB and White LED Drivers with Adaptive
Power Control and 1MHz I 2 C/SMBus Serial Interface
Efficiency Optimizer
The Efficiency Optimizer improves power efficiency by adjusting each external LED power supply output voltage to the
minimum required by the connected LED strings. It does this by injecting a current from the FBO output into the external
LED power source voltage divider (Figure 5), thus lowering the LED supply voltage. The power supply's feedback
voltage (internal reference voltage) must be 1.4V or less, and the voltage setting feedback network divider must be
accessible. Use a Schottky diode (CMPSH-3 or similar) as shown to protect the power source against reverse current
flow into the FBO pin, should the power supply circuit be powered before the MSL3162.
Figure 5. Atmel LED Driver-MSL3162
FBO_Connection to Power Supply Voltage Divider
Connecting an LED String Power Supply to an Efficiency Optimizer
An LED string power supply uses a voltage divider (R TOP and R BOTTOM in Figure 6) to set its output voltage. The maximum
output voltage is set by the voltage divider ratio and the power supply feedback regulation voltage per the equation:
V FB = V OUT ( MAX ) *
R BOTTOM
R TOP + R BOTTOM
or
V OUT ( MAX ) = V FB *
R TOP + R BOTTOM
R BOTTOM
V OUT(MAX) must exceed the maximum LED string voltage to ensure regulation, but ensure that V OUT(MAX) is always under
the 40V maximum rating of the MSL3162’s LED string outputs, STR0 to STR15.
The Efficiency Optimizer modifies the feedback network by injecting a current, I FBO , in the range of 0 to 45μA from the
FBO output into the measurement node, FB. The minimum power supply output voltage is determined by the equation:
V OUT ( MIN ) = V OUT ( MAX ) ? ( I F BOx ( MAX ) * R TOP )
where I FBOx(MAX) is the 45μA maximum output current from the Efficiency Optimizer output.
From these equations, the equations to calculate the feedback resistors are:
R TOP = V FB *
V MAX ? V MIN
I FBO ( MAX )
and
R BOTTOM = R TOP *
V FB
V OUT ? V FB
Atmel LED Driver-MSL3162
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSL3162-TB | 制造商:Atmel Corporation 功能描述:16-STRING RGB & WHITE LED DRIVERS WITH A - Bulk |
| MSL3163BT | 功能描述:LED照明驱动器 16Str Wht RGB Adptv Pwr Ctrl E2PROM I2 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 |
| MSL3163BT-R | 功能描述:LED照明驱动器 16Str Wht RGB Adptv Pwr Ctrl E2PROM I2 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 |
| MSL3164BT | 功能描述:LED照明驱动器 16Str Whte & RGB LED Dr Adptv Pwr Ctrl 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 |
| MSL3164BT-R | 功能描述:LED照明驱动器 16Str Whte & RGB LED Dr Adptv Pwr Ctrl 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 |
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