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 Application Note 1583
ISL6745AHEVAL5Z and ISL6745ALEVAL5Z: TRIAC
Dimmer Compatible LED Driver
Abstract Features of the Board
ISL6745AHEVAL5Z (high line) and ISL6745ALEVAL5Z VIN: 160~270VAC (ISL6745AHEVAL5Z), 90V~144V
(low line) are low cost, high performance LED drivers (ISL6745ALEVAL5Z)
with Power Factor Correction (PFC). They use Intersil’s IO = 350/500/700mA/1.05A; VO = 32/48V,
voltage mode PWM controller ISL6745A to operate a PO(MAX) = 33W
Flyback converter in Discontinuous Conduction Mode
Isolated, Flyback Converter
(DCM) for PFC. Th
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