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Quick Start Guide
The MSL2162 LED string controller drives, monitors, and dims multiple LEDs at high efficiency for LCD backlighting and
signage applications. This section summarizes the capabilities of the MSL2162 for quick evaluation.
How Many LEDs and Drivers?
The MSL2162 controls 16 strings of series-connected LEDs at up to 350mA per string. Up to eight MSL2162s share
a serial interface. The maximum number of LEDs per string is determined by the maximum power supply voltage, the
LED forward voltage drop (V F ), and the gate drive outputs of the MSL2162. The MSL2162 FET gate drive outputs are
optimized for FETs requiring up to 10nC of charge.
LED Power Supplies and Efficiency Optimizers (EOs)
The MSL2162 Efficiency Optimizer (EO) circuits dynamically adjust up to two LED string power supplies to the minimum
voltage necessary to accurately drive the LED strings while assuring accurate current flow. The power supplies can use
any topology, and are typically DC-DC boost or buck, or AC-DC off-line switcher supplies. The EOs rely on close matching
of the LED strings connected to a string supply. The better the matching, the better is the overall efficiency. Multiple
devices easily link together to optimize a single power supply.
Timing, PWM, Intensity Controls, and Synchronization
For video applications, the PWM LED drive signals synchronize to the LCD’s video frame timing via the PHI input, and
to the LCD’s pixel timing via the GSC input. This synchronization eliminates beating artifacts. Suitability for LED backlight
architectures is shown in Table 1. Area LED dimming for direct backlighting is supported for contrast and color gamut
improvement. Motion blur is reduced by setting each LED string’s PWM phasing individually to synchronize PWM off-times
with the LCD update timing.
The MSL2162 also includes easily controlled internal PWM timing generation for standalone (non-video) LED lighting
applications that do not provide external timing sources. One MSL2162 simply generates PWM timing for itself, and for the
other devices in a multiple device application. Optionally, a single external PWM signal applied to the PWM input controls all
of the strings on-times, with automatic progressive phase delay available through a single control bit.
Table 1. LED Common Backlight Drive Architectures and Features
4
BACKLIGHT TYPE
White LED - bottom edge-Lit
White LED - top/bottom edge-Lit
White LED - 4 sides edge-lit
White LED - direct back-lit
RGB LED - direct back-lit
MOTION BLUR
REMOVAL
No
No
No
Yes, LED string
phasing
Yes, LED string
phasing
AREA DIMMING
MANAGEMENT
No
No
No
Higher contrast ratio
(area dimming)
Higher contrast ratio and
color gamut
STRING SUPPLY
OPTIONS
Up to two Efficiency
Optimized power
supplies
Two Efficiency
Optimized power
supplies
Atmel LED Driver-MSL2162
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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
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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
MSL2166-DU
功能描述:LED照明驱动器 16-String LED Driver Mult-PWM Modes 2FO 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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