Features
- Input Voltage Feed Forward Compensation
- Precision Duty Cycle and Deadtime Control
- Adjustable Delayed Overcurrent Shutdown and Re-Start
- Adjustable Short Circuit Shutdown and Re-Start
- Adjustable Oscillator Frequency Up to 2MHz
- Bidirectional Synchronization
- Adjustable Input Undervoltage Lockout/Inhibit
- Tight Tolerance Voltage Reference Over Line, Load, and Temperature
- Adjustable Soft-Start
- Fault Signal
- 95µA Startup Current
- Internal Over-Temperature Protection
- System Over-Temperature Protection Using a Thermistor or Sensor
- Pb-free and ELV, WEEE, RoHS Compliant
Description
The ISL6740A is an enhanced ISL6740 PWM controller featuring built-in voltage feed forward functionality. It is pin and feature compatible with the ISL6740 double-ended pulse width modulating (PWM) voltage-mode controller, allowing easy drop-in replacement on existing designs. Voltage feed forward compensates for input voltage variation without intervention of the feedback control loop. It is particularly useful in unregulated bus converters and DC transformers where wide input voltage variation would otherwise result in large output voltage swings. In addition to voltage feed forward compensation, the ISL6740A features an extremely flexible oscillator that allows precise control of frequency, duty cycle, and deadtime. Deadtimes of under 40ns are easily achievable. This advanced BiCMOS design features low operating current, adjustable switching frequency up to 1MHz, adjustable soft-start, internal and external over-temperature protection, fault annunciation, and a bidirectional SYNC signal that allows the oscillator to be locked to paralleled units or to an external clock for noise sensitive applications.
Applications
- Telecom and Datacom Power
- Wireless Base Station Power
- File Server Power
- Industrial Power Systems
- DC Transformers and Bus Converters
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL6740AIVZA | Obsolete | N/A | In Stock | RoHS:EN | TSSOP | 16# | Tube | 1 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL6740AIVZA-T | Obsolete | N/A | Out of Stock | RoHS:EN | TSSOP | 16# | Reel | 1 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- Product Change NoticePDF 131 KB PCN21006 Jan 25, 2021
- Product Change NoticePDF 294 KB PCN14036 Jul 08, 2014
- Product Change NoticePDF 98 KB PCN12094 Dec 19, 2012
- Product Change NoticePDF 126 KB PCN11109A Dec 05, 2011
- Product Change NoticePDF 120 KB PCN11109 Oct 17, 2011
- 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.
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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 Notes & White Papers (2)
- Product Change NoticePDF 131 KB PCN21006 Jan 25, 2021
- Product Change NoticePDF 294 KB PCN14036 Jul 08, 2014
- Product Change NoticePDF 98 KB PCN12094 Dec 19, 2012
- Product Change NoticePDF 126 KB PCN11109A Dec 05, 2011
- Product Change NoticePDF 120 KB PCN11109 Oct 17, 2011
Product Notices (PCN, EOL, etc) (5)
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