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说明

特性

The MAX15159, a high-voltage, multiphase boost/flyback controller with enhanced low-side MOSFET gate drivercapability, is designed to support single-phase or dual-phase boost/flyback configurations. Two devices can be stackedup for triple-phase or quad-phase operation. The output voltage can be dynamically set through the 1.5V to 2.2V referenceinput (REFIN) for modular design support.

The switching frequency is controlled either through an external resistor setting the internal oscillator or by synchronizingthe regulator to an external clock. The device is designed to support 120kHz to 1MHz switching frequencies. When twodevices are stacked up as controller-target for triple-phase or quad-phase operation, the SYNC pins of two devices areconnected to ensure clock synchronization and phase interleaving. The controller has a dedicated enable/inputundervoltage lockout (EN/UVLO) pin to configure for flexible power sequencing.

The MAX15159 has a dedicated RAMP pin to adjust internal slope compensation. The device features adjustableovercurrent protection through the dedicated ILIM pin. The device incorporates current-sense amplifiers to accuratelymeasure the current of each phase across external sense resistors to implement accurate phase current sharing. Thecontroller is also protected against output overvoltage, input undervoltage, and thermal shutdown.

APPLICATIONS

• Communication
• Industrial
• Multiphase Flyback
• IEEE802.3bt Powered Device

参数