资料介绍
The ISL6745A is a low-cost double-ended voltage-mode PWM controller designed for half-bridge and full-bridge power supplies and line-regulated bus converters. It provides precise control of switching frequency, adjustable soft-start, and overcurrent shutdown. In addition, the ISL6745A allows for accurate adjustment of MOSFET non-overlap time ("deadtime") with deadtimes as low as 35ns, allowing power engineers to optimize the efficiency of open-loop bus converters. The ISL6745A also includes a control voltage input for closed-loop PWM and line voltage feed-forward functions. The ISL6745A is identical to the ISL6745, 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 also features adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults. The ISL6745A is available in a space-saving MSOP-10 package and is guaranteed to meet rated specifications over a wide -40°C to +105°C temperature range.
ISL6745ALEVAL3Z: TRIAC Dimmer Compatible
High Brightness White LED Driver
Application Note July 28, 2009 AN1487.0
Abstract Configuration with Phase Controlled Triac Wall
The ISL6745ALEVAL3Z is a low cost, high performance LED Dimmer
driver with power factor correction function, and is Input VAC: 80V~ 140V
compatible with the widely used wall dimmers. It uses Efficiency η: 78%
Intersil’s voltage mode PWM controller ISL6745A to oper
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