ISL6744A中文资料Intermediate Bus PWM Controller数据手册Renesas规格书

描述 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.

特性 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)

应用 Application

• Telecom and Datacom Isolated Power
• DC Transformers
• Bus Converters