Description:The ISL6726 is a highly featured single-ended PWM controller intended for applications using the active clamp forward converter topology in either n- or p-channel active clamp configurations, the asymmetric half-bridge topology, and the standard forward topologies with synchronous rectification. It is a current-mode PWM controller with many features designed to simplify its use. Among its many features are a precision oscillator which allows accurate control of the deadtime and maximum duty cycle, bi-direct
The recommended PCB layout for the ISL6726AAZ involves keeping the high-frequency components (such as the switching FETs and the output filter) close to the IC, using a solid ground plane, and minimizing the length of the traces carrying high-frequency signals. Additionally, it is recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to reduce noise and EMI.
The selection of the output filter components (L and C) depends on the desired output voltage ripple, output current, and switching frequency. A good starting point is to use the component values recommended in the datasheet, and then adjust them based on the specific application requirements. It is also important to consider the component tolerances, temperature coefficients, and parasitic effects when selecting the output filter components.
The maximum allowed input voltage for the ISL6726AAZ is 28V, but it is recommended to operate the device with an input voltage below 25V to ensure reliable operation and to prevent damage to the internal components.
The ISL6726AAZ has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor and a capacitor. The OCP threshold can be set by selecting the appropriate resistor value. Additionally, the device has a programmable overcurrent protection feature that can be implemented using an external circuitry.
The recommended thermal management strategy for the ISL6726AAZ involves using a heat sink with a thermal resistance of less than 10°C/W, and ensuring good airflow around the device. Additionally, it is recommended to keep the device away from other heat sources and to use thermal interface materials to improve the heat transfer between the device and the heat sink.
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ISL6726AAZ Overview
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