概要
説明
The iW7027 is a 16-channel LED backlight driver that enhances TV picture quality and reduces BOM cost for 2D and 3D LCD TVs. It uses external LED current sinks and up to two external DC/DC converters (boost, buck, LLC, etc.) for the LED driver to enable easy current and voltage scaling. By integrating Renesas' patented BroadLED™ technology, enabling a unique 2-pin LED open/short sensing technology to protect the external current sinks, the iW7027 eliminates the need for high voltage sensing components and reduces the required pin count, resulting in a smaller, lower-cost package. The BroadLED technology also enables the use of loosely binned LED arrays, further reducing the total BOM cost.
Renesas' patented AnyMode™ dimming offers comprehensive, simple and flexible options to improve LED TV picture quality. It allows continuous PWM signals or burst PWM 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. A built-in phase-locked loop (PLL ) further ensures jitter-free operation even with a noisy VSYNC signal.
特長
- 16-channel LED driver controller, unlimited LED voltage per channel
- Patented BroadLED™ adaptive switch mode technology for high current matching at maximum efficiency
- Enables patented 2-pin external LED open/short protection circuit
- Enables the use of cheaper, loosely binned LED arrays for lower BOM cost
- TQFP-44 package – Reduced pin count and cost
- Flexible input supply voltage rating: 5V/9V-16V
- AnyMode™ comprehensive dimming control improves picture quality
- High-frequency PWM dimming up to 4kHz
- Scanning-mode PWM dimming
- Configurable phase-shift dimming
- 8-bit analog dimming
- 12-bit PWM dimming
- Hybrid dimming (analog and PWM)
- PWM dimming range: 0% to 99.9%
- Scalable LED current
- Supports 2D and 3D LCD TV modes
- Supports patterned retarder (PR) and shutter glass (SG) 3D technologies
- 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
- Digitally controlled scanning mode
- External LED current sink MOSFETs for maximum flexibility
- SPI daisy-chain interface simplifies design when supporting more than 16 LED strings
- Internal PLL ensures jitter-free operation even with a noisy VSYNC signal
- Reduces BOM costs
- Digital control engine eliminates the need for MCUs
- 2-pin sensing removes the need for external high voltage sensing components
- 5V/9V-16V input supply voltage eliminates the need for separate voltage rail
製品比較
アプリケーション
- Direct and Edge-Lit LED TVs
設計・開発
モデル
ECADモデル
[製品選択]テーブル内の製品名をクリックするとSamacSysが提供する回路図シンボル、PCBフットプリント、3D CADモデルがご確認いただけます。 お探しのシンボルやモデルが見つからない場合、Webサイトから直接リクエストできます。
Processing table
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product