The ISL6744A is a low-cost, primary, dual-ended controller for full - and half-bridge topologies using random DC/DC converters. It is a voltage type PWM controller suitable for half - bridge and full - bridge power supply. It provides precise switching frequency control, adjustable soft start, precise dead-time control, dead-time as low as 35ns, and overcurrent off.
The ISL6744A is the same as the ISL6744, but optimized for high-noise environments. Low startup and operating currents allow for easy bias in AC/DC and DC/DC applications. This advanced BiCMOS design features low startup and operating currents, adjustable switching frequencies up to 1MHz, 1A FET drivers, and very low propagation delay for rapid response to overcurrent failures
ISL6744A Pin Configuration
ISL6744A Block Diagram
ISL6744A Typical Application
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)
Applications
● Isolated power supply for telecommunications and data communications
● DC transformer
● Bus converter
