Features
- Synchronous rectifier control outputs with adjustable delay/advance
- Adjustable average current signal
- 3% Tolerance cycle-by-cycle peak current limit
- Fast current sense to output delay
- Adjustable oscillator frequency up to 2MHz
- Adjustable dead time control
- Voltage- or current-mode operation
- Separate RAMP and CS inputs for voltage feed-forward or current-mode applications
- Tight tolerance error amplifier reference over line, load, and temperature
- 175µA start-up current
- Supply UVLO
- Adjustable soft-start
- 70ns leading edge blanking
- Multipulse suppression
- Internal over-temperature protection
- Pb-Free (RoHS compliant)
ISL6742 Functional Diagram
Description
The ISL6742 is a high-performance double-ended PWM controller with advanced synchronous rectifier control and current limit features. It is suitable for both current- and voltage-mode control methods. The ISL6742 includes complemented PWM outputs for Synchronous Rectifier (SR) control. The complemented outputs may be dynamically advanced or delayed relative to the main outputs using an external control voltage. Its advanced current sensing circuitry employs sample and hold methods to provide a precise average current signal. Suitable for average current limiting, a technique which virtually eliminates the current tail-out common to peak current limiting methods, it is also applicable to current sharing circuits and average current-mode control. This advanced BiCMOS design features an adjustable oscillator frequency up to 2MHz, internal over-temperature protection, precision dead time control, and short propagation delays. Additionally, multipulse suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
Applications
- Half-Bridge, Full-Bridge, Interleaved Forward, and Push-Pull Converters
- Telecom and Datacom Power
- Wireless Base Station Power
- File Server Power
- Industrial Power Systems
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL6742AAZA | Obsolete | N/A | In Stock | RoHS:EN | QSOP | 16# | Tube | 2 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL6742AAZA-T | Obsolete | N/A | Out of Stock | RoHS:EN | QSOP | 16# | Reel | 2 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- Product Change NoticePDF 294 KB PCN14036 Jul 08, 2014
- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
- Application NotePDF 1.05 MB an1245 Oct 31, 2003AI-generated Summary: The iSim ISL6742 Virtual Evaluation Platform enables interactive simulation and analysis of power supply designs. It provides tools to update schematics, generate Bills of Materials, and view detailed waveform data including steady state and transient analyses. Users can adjust FET driver delays and current limits to optimize synchronous rectifier timing and output response. The platform highlights the behavior of average and peak current limits, voltage-mode control, and transient load responses, aiding in design validation and optimization.
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- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
- Application NotePDF 1.05 MB an1245 Oct 31, 2003AI-generated Summary: The iSim ISL6742 Virtual Evaluation Platform enables interactive simulation and analysis of power supply designs. It provides tools to update schematics, generate Bills of Materials, and view detailed waveform data including steady state and transient analyses. Users can adjust FET driver delays and current limits to optimize synchronous rectifier timing and output response. The platform highlights the behavior of average and peak current limits, voltage-mode control, and transient load responses, aiding in design validation and optimization.
Application Notes & White Papers (3)
- Product Change NoticePDF 294 KB PCN14036 Jul 08, 2014
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