TPS61177

适用于笔记本和平板电脑显示屏的 WLED 驱动器，具有固定模式调光功能; • 2.5V to 24V Input Voltage Range\n• 39 V Maximum Output Voltage\n• Integrated 1.8 A /40 V MOSFET\n• 450 kHz to 1.2 MHz Programmable Switching Frequency\n• Adaptive Boost Output to WLED Voltages\n• 100Hz to 25kHz Wide Input PWM Dimming Frequency Range\n• 1% Minimum Dimming Duty Cycle\n• Small External Components\n• Integrated Loop Compensation\n• Six Current Sinks of 30mA Max\n• 1% (Typical) Current Matching\n• Input PWM Glitch Filter\n• PWM Brightness Interface Control\n• Three Optional Dimming Methods, Including Direct PWM Dimming, Analog Dimming and Analog/PWM Mixed Dimming\n• Built-in WLED Open Protection\n• Thermal Shutdown\n• 20 Leads 3.5mm × 3.5mm × 0.9mm QFN Package;

The TPS61177 IC provides a highly integrated WLED driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 1.8A /40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 72 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency. The TPS61177 supports the analog dimming, analog/PWM dimming and direct PWM dimming method. During analog dimming mode, each CS current linearly varies depending on the duty cycle information on the PWMB pins. During analog and PWM mixed dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current linearly over 25% to 100% brightness area. And the device also allows adding PWM dimming when the analog current down to 25%. Below 25%, the analog signal will translate to PWM duty cycle information to control the on/off of WLED current and average the WLED current down to 1%. The frequency of adding PWM dimming is same to input PWM frequency on the PWMB pin. While the TPS61177 also supports direct PWM dimming method, in direct PWM dimming mode the WLED current is turned on/off synchronized with the input PWM signal.

TPS61177

PACKAGE MATERIALS INFORMATION

TPS61177A

适用于笔记本和平板电脑显示屏的 WLED 驱动器; • 2.5V 至 24V 输入电压范围\n• 39V 最大输出电压\n• 集成 1.8A、40V 金属氧化物半导体场效应晶体管 (MOSFET)\n• 450kHz 至 1.2MHz 可编程开关频率\n• 为白色发光二极管 (WLED) 提供电压的自适应升压输出\n• 100Hz 至 25kHz 宽输入脉宽调制 (PWM) 调光频率范围\n• 1% 最小调光占空比\n• 小型外部组件\n• 集成环路补偿\n• 六路最高 30mA 的灌电流\n• 1% 电流匹配（典型值）\n• 输入 PWM 毛刺脉冲滤波器\n• PWM 亮度接口控制\n• 三种调光方法可供选择，包括直接 PWM 调光、模拟调光以及模拟和 PWM 混合调光\n• 内置 WLED 开路保护\n• 热关断;

TPS61177A 器件可为笔记本 LCD 背光提供高度集成的白色 LED (WLED) 驱动器解决方案。该器件内置高效升压稳压器，稳压器集成有 1.8A、40V 功率 MOSFET。六个灌电流稳压器提供了高精度的电流调节和匹配。该器件总共可支持 72 个 WLED。此外，升压输出还可自动地将其电压调节至 WLED 正向电压以优化效率。\n\nTPS61177A 支持模拟调光、模拟和 PWM 混合调光以及直接 PWM 调光三种方法。在模拟调光模式下，各 CS 电流将根据 PWMB 引脚上的占空比信息线性变化。在模拟和 PWM 混合调光模式下，输入 PWM 占空比信息将转换成模拟信号，以在 25% 至 100% 的亮度区域线性控制 WLED 电流。该器件还可在模拟电流低至 25% 时增加 PWM 调光。电流低于 25% 后，模拟信号会转换成 PWM 占空比信息以控制 WLED 电流的导通或关断并求取低至 1% 的 WLED 电流的平均值。增加 PWM 调光的频率与 PWMB 引脚上的输入 PWM 频率相同。TPS61177A 还支持直接 PWM 调光方法，在直接 PWM 调光模式下，将根据 PWM 输入信号同步导通或关断 WLED 电流。

TPS61177A

WLED Driver for Notebooks

TPS61177ARGRR

WLED Driver for Notebooks

TPS61177RGRR

PACKAGE MATERIALS INFORMATION

TPS61177AEVM

包装：盒 类别：开发板，套件，编程器 评估板 - LED 驱动器 描述：TPS61177AEVM

TPS61177ARGRR

Package：20-VFQFN 裸露焊盘；包装：卷带（TR）剪切带（CT）Digi-Reel® 得捷定制卷带 类别：集成电路（IC） LED 驱动器 描述：IC LED DRV RGLTR PWM 30MA 20VQFN

TPS61177RGRR

Package：20-VFQFN 裸露焊盘；包装：卷带（TR） 类别：集成电路（IC） LED 驱动器 描述：IC LED DRV RGLTR PWM 30MA 20VQFN