PWM controller increases efficiency and saves space

2 May 2007 Power Electronics / Power Management

Intersil's ISL6535 is a high performance synchronous controller for demanding DC-DC converter applications. It provides overcurrent fault protection and is designed to safely startup into pre-biased output loads. The output voltage of the converter can be precisely regulated to as low as 0,597 V, with a maximum tolerance of ±1% over the commercial temperature range, and ±1,5% over the industrial temperature range.

The ISL6535 provides simple, single feed-back loop, voltage mode control with fast transient response. It includes a triangle-wave oscillator that is adjustable from below 50 kHz to over 1,5 MHz. Full (0-100%) PWM duty cycle support is provided.

The error amplifier features a 15 MHz gain-bandwidth product and 6 V/μs slew rate, which enables high converter bandwidth for fast transient performance. The ISL6535's overcurrent protection monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor. It operates from +12 V input.

For more information contact Andrew Athanasiou, Arrow Altech Distribution, +27 (0)21 555 1884, [email protected]

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