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iW7038
High Precision, 16-Channel LED Backlighting Driver with Integrated Current Sinks for High Dynamic Range (HDR) LCD Displays
BroadLED™ Technology Improves Thermal Performance for High Ambient Temperature Applications
The iW7038 LED driver for LCD backlighting integrates 16 precision current sinks with advanced digital control technology to improve brightness control in High Dynamic Range (HDR) displays. The digital control block uses Dialog’s BroadLED™ adaptive switch technology, improving thermal performance by optimizing the voltage drop across each LED string, while enabling precision matching with unbinned LEDs.
The iW7038 also uses Dialog’s patented AnyMode™ dimming, which offers comprehensive, simple and flexible options to improve HDR display picture quality. It allows continuous PWM signals or very narrow PWM burst signals that are fully synchronized to the video frame at the same or higher frequency. The PWM duty cycle can be updated in each video frame and with user-configurable tail or head delays. This provides more options to reduce motion blur and improve the contrast ratio.
AnyMode dimming also helps reduce motion blur caused by the human visual system (HVS) by generating high intensity, short duration PWM pulses. This results in faster fade out and reduces the physiological afterimage effects of the HVS, important for automobile dashboard displays.
Lifecycle status
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Active
特征
16-channel LED driver with internal MOSFET current sinks
每个通道55V最大输出电压
Patented BroadLED™ adaptive switch mode technology for high current matching at maximum efficiency
- Reduces power dissipation requirements
- Enables use of cheaper, loosely binned LED arrays for lower BOM cost
Flexible input supply voltage rating: 12V (9V-16V)
AnyMode™ comprehensive dimming control improves picture quality
- 13位PWM调光或11位全球调光，以提高对比度
- Head, tail, center mode PWM alignments to reduce motion blur
- 9-bit independent analog dimming
- PWM dimming range: 0% to 99.9%
- 可编程转换速率 - 更好的EMI控制
Comprehensive protection features:
- Individual LED short protection
- Channel-to-channel short protection
- Current sink MOSFET drain-to-source short protection
- Current sense resistor short protection
- Microcontroller interrupt interface
- LED open-fault detection
- Over-temperature protection
外部电流检测电阻 - 用于当前要求的最大灵活性
- 每个通道的200mA最大;支持2通道分组
SPI daisy-chain interface simplifies design when supporting more than 16 LED strings
3个LED驱动器中的SPI通信保护模式
Internal PLL ensures jitter-free operation even with noisy VSYNC signal
亚博国际官网平台网址
LCD Backlighting for HDR LCD TV, Monitor and Notebook Displays
Automotive Displays
Block Diagrams
典型的应用程序图亚博国际官网平台网址
