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ISL6611A - Phase Doubler

Key Features

  • 4A typical sink current for the lower gate driver, enhancing the lower MOSFET gate hold-down capability during PHASE node rising edge, preventing power loss caused by the self turn-on of the lower MOSFET due to the high dV/dt of the switching node. The ISL6611A also features an input that recognizes a high-impedance state, working together with Intersil multiphase PWM controllers to prevent negative transients on the controlled output voltage when operation is suspended. This feature eliminates.

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Full PDF Text Transcription (Reference)

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DATASHEET ISL6611A Phase Doubler with Integrated Drivers and Phase Shedding Function FN6881 Rev 1.00 August 28, 2012 The ISL6611A utilizes Intersil’s proprietary Phase Doubler scheme to modulate two-phase power trains with single PWM input. It doubles the number of phases that Intersil’s ISL63xx multiphase controllers can support. At the same time, the PWM line can be pulled high to disable the corresponding phase or higher phase(s) when the enable pin (EN_PH) is pulled low. This simplifies the phase shedding implementation. For layout simplicity and improving system performance, the device integrates two 5V drivers (ISL6609) and current balance function.