Description:The ISL6731A and ISL6731B are active power factor correction (PFC) controller ICs that use a boost topology. The controllers are suitable for AC/DC power systems up to 2kW and over the universal line input. The ISL6731A and ISL6731B operate in Continuous Current Mode (CCM). Accurate input current shaping is achieved with a current error amplifier. A patent pending breakthrough negative capacitance technology minimizes zero crossing distortion and reduces the magnetic components size. The small external comp
The recommended PCB layout for the ISL6731AFBZ involves placing the input capacitors close to the VIN pin, using a solid ground plane, and keeping the high-current paths short and wide. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to minimize noise and EMI.
The selection of input and output capacitors for the ISL6731AFBZ depends on the specific application requirements. In general, it's recommended to use low-ESR capacitors with a voltage rating higher than the maximum input voltage. The output capacitor should be selected based on the output voltage ripple and transient response requirements. A good starting point is to use a 10uF to 22uF ceramic capacitor for the input and a 22uF to 47uF ceramic capacitor for the output.
The maximum ambient temperature range for the ISL6731AFBZ is -40°C to +125°C. However, the device can operate up to +150°C with derating. It's recommended to consult the datasheet for the thermal derating curve to ensure reliable operation.
The ISL6731AFBZ has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor divider network. The resistor values can be calculated based on the desired overcurrent threshold. Additionally, the device also has a hiccup mode that can be enabled to prevent damage from repeated overcurrent events.
The recommended input voltage range for the ISL6731AFBZ is 4.5V to 18V. However, the device can operate up to 20V with reduced performance. It's recommended to consult the datasheet for the input voltage range vs. output voltage and current capability.
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ISL6731AFBZ Overview
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