Features
- 128-step adjustable sink current output
- 2.6V to 3.6V digital supply voltage operating range (3.0V minimum programming voltage)
- 4.5V to 20V analog supply voltage operating range (10.8V minimum programming voltage)
- Rewritable EEPROM for storing the optimum VCOM value
- Output adjustment enable/disable control
- Output guaranteed monotonic over-temperature
- Two pin adjustment, programming and enable
- Ultra-thin 8 Ld 3mm x 3mm DFN (0.8mm max)
- Pb-Free (RoHS compliant)
ISL45042 Functional Diagram
Description
The VCOM voltage of an LCD panel needs to be adjusted to remove flicker. The ISL45042 can be used to digitally adjust a panel's VCOM voltage by controlling its output sink current. The output of the ISL45042 is connected to an external voltage divider and an external VCOM buffer amplifier. In this application, the user can control the VCOM voltage with 7-bit accuracy (128 steps). Once the desired VCOM setting is obtained, the settings can be stored in the non-volatile EEPROM memory, which would then be automatically recalled during every power-up. The VCOM adjustment and non-volatile memory programming is through a single interface pin (CTL). Once the desired programmed value is obtained, the Counter Enable pin (CE) can be used to prevent further adjustment or programming. The full-scale sink current of the ISL45042 is set using an external resistor connected to the SET pin. The full-scale sink current determines the lowest voltage of the external voltage divider. The ISL45042 is available in an 8 Ld 3mm x 3mm TDFN package with a maximum thickness of 0.8mm for ultra-thin LCD panel design.
Applications
- LCD panels
| Part Number | Status | Samples | Stock | RoHS | Package | Carrier Type |
|---|---|---|---|---|---|---|
| ISL45042IRZ | Obsolete | N/A | In Stock | RoHS:EN | TDFN | Tube |
| ISL45042IRZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | TDFN | Reel |
| ISL45042IRZ-TK | Obsolete | N/A | Out of Stock | RoHS:EN | TDFN | Reel |
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- Application NotePDF 564 KB an1993 May 22, 2018AI-generated Summary: Voltage feedback (VFB) amplifiers use a differential input pair, a high-impedance stage, and an output buffer to convert input voltage differences into output voltage. The VFB amplifier's gain decreases at a dominant pole frequency due to compensation capacitors. Current feedback (CFB) amplifiers include a class AB input amplifier, current mirror, high-impedance stage, and output buffer. CFB amplifiers provide faster switching and higher slew rates by drawing charge/discharge currents directly from supply rails, unlike VFB amplifiers which are limited by biasing current sources.
- Product AdvisoryPDF 213 KB PA16018 Feb 02, 2016
- Product Change NoticePDF 284 KB PCN11043 Apr 11, 2011
- Application NotePDF 280 KB an1157 Apr 29, 2005AI-generated Summary: Digitally controlled potentiometers (XDCPs) enable precise power supply and DC to DC converter control by allowing cascading configurations for fine and coarse voltage adjustments. These devices store wiper settings in nonvolatile memory, ensuring long-term reliability and simplifying manufacturing and testing. XDCPs improve repeatability, reduce human error, and enhance resistance to environmental stress, making them superior to mechanical potentiometers in power applications.
- Application NotePDF 357 KB an1694 Jan 19, 2004AI-generated Summary: The document outlines the four fundamental internal blocks of an operational amplifier and presents a simple 2:1 stage circuit diagram. It includes important legal notices from Renesas Electronics regarding the use, liability, and intellectual property rights of their semiconductor products. The document clarifies product quality grades, intended applications, and restrictions on use in life-critical or hazardous systems. It emphasizes compliance with applicable laws and safety responsibilities when using Renesas products. Contact information for Renesas sales offices worldwide is also provided.
- Application NotePDF 298 KB an1208 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design, liability disclaimers from Renesas Electronics, and restrictions on product modification or reverse engineering. It classifies products into Standard and High Quality grades, specifying intended applications and prohibiting use in life-critical or hazardous systems unless explicitly designated. Users must follow the latest product specifications, ensure compliance with laws and export controls, and implement safety measures against failures. Contact information for Renesas sales offices worldwide is provided.
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Datasheets (1)
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- Application NotePDF 564 KB an1993 May 22, 2018AI-generated Summary: Voltage feedback (VFB) amplifiers use a differential input pair, a high-impedance stage, and an output buffer to convert input voltage differences into output voltage. The VFB amplifier's gain decreases at a dominant pole frequency due to compensation capacitors. Current feedback (CFB) amplifiers include a class AB input amplifier, current mirror, high-impedance stage, and output buffer. CFB amplifiers provide faster switching and higher slew rates by drawing charge/discharge currents directly from supply rails, unlike VFB amplifiers which are limited by biasing current sources.
- Application NotePDF 280 KB an1157 Apr 29, 2005AI-generated Summary: Digitally controlled potentiometers (XDCPs) enable precise power supply and DC to DC converter control by allowing cascading configurations for fine and coarse voltage adjustments. These devices store wiper settings in nonvolatile memory, ensuring long-term reliability and simplifying manufacturing and testing. XDCPs improve repeatability, reduce human error, and enhance resistance to environmental stress, making them superior to mechanical potentiometers in power applications.
- Application NotePDF 357 KB an1694 Jan 19, 2004AI-generated Summary: The document outlines the four fundamental internal blocks of an operational amplifier and presents a simple 2:1 stage circuit diagram. It includes important legal notices from Renesas Electronics regarding the use, liability, and intellectual property rights of their semiconductor products. The document clarifies product quality grades, intended applications, and restrictions on use in life-critical or hazardous systems. It emphasizes compliance with applicable laws and safety responsibilities when using Renesas products. Contact information for Renesas sales offices worldwide is also provided.
- Application NotePDF 298 KB an1208 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design, liability disclaimers from Renesas Electronics, and restrictions on product modification or reverse engineering. It classifies products into Standard and High Quality grades, specifying intended applications and prohibiting use in life-critical or hazardous systems unless explicitly designated. Users must follow the latest product specifications, ensure compliance with laws and export controls, and implement safety measures against failures. Contact information for Renesas sales offices worldwide is provided.
Application Notes & White Papers (4)
- Product AdvisoryPDF 213 KB PA16018 Feb 02, 2016
- Product Change NoticePDF 284 KB PCN11043 Apr 11, 2011
Product Notices (PCN, EOL, etc) (3)
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