The ISL6744 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 fullbridge power supplies. It provides precise control of switching frequency, adjustable soft-start, precise deadtime control with deadtimes as low as 35ns, and overcurrent shutdown.
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.
Key Features
- Precision Duty Cycle and Deadtime Control
- 100µA Start-up Current
- Adjustable Delayed Overcurrent Shutdown and Re-Start
- 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 Plus Anneal Available (RoHS Compliant)
Applications
- Telecom and Datacom Isolated Power
- DC Transformers
- Bus Converters
Order Information| Part Number | Package Type | Weight(g) | Pins | MSL Rating | Peak Temp (°C) | RoHS Status |
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| ISL6744AB | 8 Ld SOIC | 0.072 | 8 | | 240 | |
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| ISL6744AB-T | 8 Ld SOIC T+R | 0.072 | 8 | | 240 | |
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| ISL6744ABZ | 8 Ld SOIC | 0.072 | 8 | 1 | 260 | RoHS |
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| ISL6744ABZ-T | 8 Ld SOIC T+R | 0.072 | 8 | 1 | 260 | RoHS |
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| ISL6744AU | 8 Ld MSOP | 0.025 | 8 | | 240 | |
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| ISL6744AU-T | 8 Ld MSOP T+R | 0.025 | 8 | | 240 | |
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| ISL6744AUZ | 8 Ld MSOP | 0.025 | 8 | 2 | 260 | RoHS |
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| ISL6744AUZ-T | 8 Ld MSOP T+R | 0.025 | 8 | 2 | 260 | RoHS |
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| ISL6744AUZ-TR5252 | 8 Ld MSOP T+R | 0.025 | 8 | 2 | 260 | RoHS |
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| ISL6744EVAL1 | | | | N/A | | |
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| ISL6744EVAL1Z | | | | N/A | | RoHS |
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