Overview
Description
The ISL6744A is a low cost, primary side, double-ended controller intended for applications using full and half-bridge topologies for unregulated DC/DC converters. It is a voltage-mode PWM controller designed for half-bridge and full-bridge power supplies. It provides precise switching frequency control, adjustable soft-start, precise dead time control with dead times as low as 35ns, and overcurrent shutdown. The ISL6744A is identical to the ISL6744, but is optimized for higher noise environments. Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults.
Features
- Precision duty cycle and dead time control
- 100μA start-up current
- Adjustable delayed overcurrent shutdown and restart
- Adjustable oscillator frequency up to 2MHz
- 1A MOSFET gate drivers
- Adjustable soft-start
- Internal over-temperature protection
- 35ns control to output propagation delay
- Small size and minimal external component count
- Input undervoltage protection
- Pb-free (RoHS compliant)
Comparison
Applications
- Telecom and Datacom Isolated Power
- DC Transformers
- Bus Converters
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 1.10 MB | |
| Product Change Notice | PDF 178 KB | |
| Product Change Notice | PDF 266 KB | |
| Product Advisory | PDF 106 KB | |
| Product Change Notice | PDF 398 KB | |
| Product Change Notice | PDF 74 KB | |
| Product Change Notice | PDF 108 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| SOICN | Tube | 3 | 2.075 | ||
ISL6744AABZ-T Active Samples Available
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|
SOICN | Reel | 3 | 2.263 | Get Samples, |
ISL6744AAUZ Active Samples Available
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|
MSOP | Tube | 1 | 2.075 | Get Samples, |
| MSOP | Reel | 1 |
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